XML序列化 判断是否是手机 字符操作普通帮助类 验证数据帮助类 IO帮助类 c# Lambda操作类封装 C# -- 使用反射（Reflect）获取dll文件中的类型并调用方法 C# -- 文件的压缩与解压（GZipStream）

XML序列化

 

#region  序列化

        /// <summary>
        /// XML序列化
        /// </summary>
        /// <param name="obj">序列对象</param>
        /// <param name="filePath">XML文件路径</param>
        /// <returns>是否成功</returns>
        public static bool SerializeToXml(object obj, string filePath)
        {
            bool result = false;

            FileStream fs = null;
            try
            {
                fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(fs, obj);
                result = true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
            return result;

        }

        /// <summary>
        /// XML反序列化
        /// </summary>
        /// <param name="type">目标类型(Type类型)</param>
        /// <param name="filePath">XML文件路径</param>
        /// <returns>序列对象</returns>
        public static object DeserializeFromXML(Type type, string filePath)
        {
            FileStream fs = null;
            try
            {
                fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(type);
                return serializer.Deserialize(fs);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

        #endregion

判断是否是手机

 

public static bool CheckAgent()
{
bool flag = false;

string agent = HttpContext.Current.Request.UserAgent;
string[] keywords = { "Android", "iPhone", "iPod", "iPad", "Windows Phone", "MQQBrowser" };

//排除 Windows 桌面系统
if (!agent.Contains("Windows NT") || (agent.Contains("Windows NT") && agent.Contains("compatible; MSIE 9.0;")))
{
//排除 苹果桌面系统
if (!agent.Contains("Windows NT") && !agent.Contains("Macintosh"))
{
foreach (string item in keywords)
{
if (agent.Contains(item))
{
flag = true;
break;
}
}
}
}

return flag;
}

字符操作普通帮助类

 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594

/// <summary>    /// 普通帮助类    /// </summary>    public class CommonHelper    {        //星期数组        private static string[] _weekdays = { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };        //空格、回车、换行符、制表符正则表达式        private static Regex _tbbrRegex = new Regex(@"\s*|\t|\r|\n", RegexOptions.IgnoreCase);          #region 时间操作          /// <summary>        /// 获得当前时间的""yyyy-MM-dd HH:mm:ss:fffffff""格式字符串        /// </summary>        public static string GetDateTimeMS()        {            return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fffffff");        }          /// <summary>        /// 获得当前时间的""yyyy年MM月dd日 HH:mm:ss""格式字符串        /// </summary>        public static string GetDateTimeU()        {            return string.Format("{0:U}", DateTime.Now);        }          /// <summary>        /// 获得当前时间的""yyyy-MM-dd HH:mm:ss""格式字符串        /// </summary>        public static string GetDateTime()        {            return DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");        }          /// <summary>        /// 获得当前日期        /// </summary>        public static string GetDate()        {            return DateTime.Now.ToString("yyyy-MM-dd");        }          /// <summary>        /// 获得中文当前日期        /// </summary>        public static string GetChineseDate()        {            return DateTime.Now.ToString("yyyy月MM日dd");        }          /// <summary>        /// 获得当前时间(不含日期部分)        /// </summary>        public static string GetTime()        {            return DateTime.Now.ToString("HH:mm:ss");        }          /// <summary>        /// 获得当前小时        /// </summary>        public static string GetHour()        {            return DateTime.Now.Hour.ToString("00");        }          /// <summary>        /// 获得当前天        /// </summary>        public static string GetDay()        {            return DateTime.Now.Day.ToString("00");        }          /// <summary>        /// 获得当前月        /// </summary>        public static string GetMonth()        {            return DateTime.Now.Month.ToString("00");        }          /// <summary>        /// 获得当前年        /// </summary>        public static string GetYear()        {            return DateTime.Now.Year.ToString();        }          /// <summary>        /// 获得当前星期(数字)        /// </summary>        public static string GetDayOfWeek()        {            return ((int)DateTime.Now.DayOfWeek).ToString();        }          /// <summary>        /// 获得当前星期(汉字)        /// </summary>        public static string GetWeek()        {            return _weekdays[(int)DateTime.Now.DayOfWeek];        }          #endregion          #region 数组操作          /// <summary>        /// 获得字符串在字符串数组中的位置        /// </summary>        public static int GetIndexInArray(string s, string[] array, bool ignoreCase)        {            if (string.IsNullOrEmpty(s) || array == null || array.Length == 0)                return -1;              int index = 0;            string temp = null;              if (ignoreCase)                s = s.ToLower();              foreach (string item in array)            {                if (ignoreCase)                    temp = item.ToLower();                else                    temp = item;                  if (s == temp)                    return index;                else                    index++;            }              return -1;        }          /// <summary>        /// 获得字符串在字符串数组中的位置        /// </summary>        public static int GetIndexInArray(string s, string[] array)        {            return GetIndexInArray(s, array, false);        }          /// <summary>        /// 判断字符串是否在字符串数组中        /// </summary>        public static bool IsInArray(string s, string[] array, bool ignoreCase)        {            return GetIndexInArray(s, array, ignoreCase) > -1;        }          /// <summary>        /// 判断字符串是否在字符串数组中        /// </summary>        public static bool IsInArray(string s, string[] array)        {            return IsInArray(s, array, false);        }          /// <summary>        /// 判断字符串是否在字符串中        /// </summary>        public static bool IsInArray(string s, string array, string splitStr, bool ignoreCase)        {            return IsInArray(s, StringHelper.SplitString(array, splitStr), ignoreCase);        }          /// <summary>        /// 判断字符串是否在字符串中        /// </summary>        public static bool IsInArray(string s, string array, string splitStr)        {            return IsInArray(s, StringHelper.SplitString(array, splitStr), false);        }          /// <summary>        /// 判断字符串是否在字符串中        /// </summary>        public static bool IsInArray(string s, string array)        {            return IsInArray(s, StringHelper.SplitString(array, ","), false);        }              /// <summary>        /// 将对象数组拼接成字符串        /// </summary>        public static string ObjectArrayToString(object[] array, string splitStr)        {            if (array == null || array.Length == 0)                return "";              StringBuilder result = new StringBuilder();            for (int i = 0; i < array.Length; i++)                result.AppendFormat("{0}{1}", array[i], splitStr);              return result.Remove(result.Length - splitStr.Length, splitStr.Length).ToString();        }          /// <summary>        /// 将对象数组拼接成字符串        /// </summary>        public static string ObjectArrayToString(object[] array)        {            return ObjectArrayToString(array, ",");        }          /// <summary>        /// 将字符串数组拼接成字符串        /// </summary>        public static string StringArrayToString(string[] array, string splitStr)        {            return ObjectArrayToString(array, splitStr);        }          /// <summary>        /// 将字符串数组拼接成字符串        /// </summary>        public static string StringArrayToString(string[] array)        {            return StringArrayToString(array, ",");        }          /// <summary>        /// 将整数数组拼接成字符串        /// </summary>        public static string IntArrayToString(int[] array, string splitStr)        {            if (array == null || array.Length == 0)                return "";              StringBuilder result = new StringBuilder();            for (int i = 0; i < array.Length; i++)                result.AppendFormat("{0}{1}", array[i], splitStr);              return result.Remove(result.Length - splitStr.Length, splitStr.Length).ToString();        }          /// <summary>        /// 将整数数组拼接成字符串        /// </summary>        public static string IntArrayToString(int[] array)        {            return IntArrayToString(array, ",");        }              /// <summary>        /// 移除数组中的指定项        /// </summary>        /// <param name="array">源数组</param>        /// <param name="removeItem">要移除的项</param>        /// <param name="removeBackspace">是否移除空格</param>        /// <param name="ignoreCase">是否忽略大小写</param>        /// <returns></returns>        public static string[] RemoveArrayItem(string[] array, string removeItem, bool removeBackspace, bool ignoreCase)        {            if (array != null && array.Length > 0)            {                StringBuilder arrayStr = new StringBuilder();                if (ignoreCase)                    removeItem = removeItem.ToLower();                string temp = "";                foreach (string item in array)                {                    if (ignoreCase)                        temp = item.ToLower();                    else                        temp = item;                      if (temp != removeItem)                        arrayStr.AppendFormat("{0}_", removeBackspace ? item.Trim() : item);                }                  return StringHelper.SplitString(arrayStr.Remove(arrayStr.Length - 1, 1).ToString(), "_");            }              return array;        }          /// <summary>        /// 移除数组中的指定项        /// </summary>        /// <param name="array">源数组</param>        /// <returns></returns>        public static string[] RemoveArrayItem(string[] array)        {            return RemoveArrayItem(array, "", true, false);        }          /// <summary>        /// 移除字符串中的指定项        /// </summary>        /// <param name="s">源字符串</param>        /// <param name="splitStr">分割字符串</param>        /// <returns></returns>        public static string[] RemoveStringItem(string s, string splitStr)        {            return RemoveArrayItem(StringHelper.SplitString(s, splitStr), "", true, false);        }          /// <summary>        /// 移除字符串中的指定项        /// </summary>        /// <param name="s">源字符串</param>        /// <returns></returns>        public static string[] RemoveStringItem(string s)        {            return RemoveArrayItem(StringHelper.SplitString(s), "", true, false);        }              /// <summary>        /// 移除数组中的重复项        /// </summary>        /// <returns></returns>        public static int[] RemoveRepeaterItem(int[] array)        {            if (array == null || array.Length < 2)                return array;              Array.Sort(array);              int length = 1;            for (int i = 1; i < array.Length; i++)            {                if (array[i] != array[i - 1])                    length++;            }              int[] uniqueArray = new int[length];            uniqueArray[0] = array[0];            int j = 1;            for (int i = 1; i < array.Length; i++)                if (array[i] != array[i - 1])                    uniqueArray[j++] = array[i];              return uniqueArray;        }          /// <summary>        /// 移除数组中的重复项        /// </summary>        /// <returns></returns>        public static string[] RemoveRepeaterItem(string[] array)        {            if (array == null || array.Length < 2)                return array;              Array.Sort(array);              int length = 1;            for (int i = 1; i < array.Length; i++)            {                if (array[i] != array[i - 1])                    length++;            }              string[] uniqueArray = new string[length];            uniqueArray[0] = array[0];            int j = 1;            for (int i = 1; i < array.Length; i++)                if (array[i] != array[i - 1])                    uniqueArray[j++] = array[i];              return uniqueArray;        }          /// <summary>        /// 去除字符串中的重复元素        /// </summary>        /// <returns></returns>        public static string GetUniqueString(string s)        {            return GetUniqueString(s, ",");        }          /// <summary>        /// 去除字符串中的重复元素        /// </summary>        /// <returns></returns>        public static string GetUniqueString(string s, string splitStr)        {            return ObjectArrayToString(RemoveRepeaterItem(StringHelper.SplitString(s, splitStr)), splitStr);        }          #endregion          /// <summary>        /// 去除字符串首尾处的空格、回车、换行符、制表符        /// </summary>        public static string TBBRTrim(string str)        {            if (!string.IsNullOrEmpty(str))                return str.Trim().Trim('\r').Trim('\n').Trim('\t');            return string.Empty;        }          /// <summary>        /// 去除字符串中的空格、回车、换行符、制表符        /// </summary>        public static string ClearTBBR(string str)        {            if (!string.IsNullOrEmpty(str))                return _tbbrRegex.Replace(str, "");              return string.Empty;        }          /// <summary>        /// 删除字符串中的空行        /// </summary>        /// <returns></returns>        public static string DeleteNullOrSpaceRow(string s)        {            if (string.IsNullOrEmpty(s))                return "";              string[] tempArray = StringHelper.SplitString(s, "\r\n");            StringBuilder result = new StringBuilder();            foreach (string item in tempArray)            {                if (!string.IsNullOrWhiteSpace(item))                    result.AppendFormat("{0}\r\n", item);            }            if (result.Length > 0)                result.Remove(result.Length - 2, 2);            return result.ToString();        }          /// <summary>        /// 获得指定数量的html空格        /// </summary>        /// <returns></returns>        public static string GetHtmlBS(int count)        {            if (count == 1)                return "    ";            else if (count == 2)                return "        ";            else if (count == 3)                return "            ";            else            {                StringBuilder result = new StringBuilder();                  for (int i = 0; i < count; i++)                    result.Append("    ");                  return result.ToString();            }        }          /// <summary>        /// 获得指定数量的htmlSpan元素        /// </summary>        /// <returns></returns>        public static string GetHtmlSpan(int count)        {            if (count <= 0)                return "";              if (count == 1)                return "<span></span>";            else if (count == 2)                return "<span></span><span></span>";            else if (count == 3)                return "<span></span><span></span><span></span>";            else            {                StringBuilder result = new StringBuilder();                  for (int i = 0; i < count; i++)                    result.Append("<span></span>");                  return result.ToString();            }        }          /// <summary>        ///获得邮箱提供者        /// </summary>        /// <param name="email">邮箱</param>        /// <returns></returns>        public static string GetEmailProvider(string email)        {            int index = email.LastIndexOf('@');            if (index > 0)                return email.Substring(index + 1);            return string.Empty;        }          /// <summary>        /// 转义正则表达式        /// </summary>        public static string EscapeRegex(string s)        {            string[] oList = { "\\", ".", "+", "*", "?", "{", "}", "[", "^", "]", "$", "(", ")", "=", "!", "<", ">", "|", ":" };            string[] eList = { "\\\\", "\\.", "\\+", "\\*", "\\?", "\\{", "\\}", "\\[", "\\^", "\\]", "\\$", "\\(", "\\)", "\\=", "\\!", "\\<", "\\>", "\\|", "\\:" };            for (int i = 0; i < oList.Length; i++)                s = s.Replace(oList[i], eList[i]);            return s;        }          /// <summary>        /// 将ip地址转换成long类型        /// </summary>        /// <param name="ip">ip</param>        /// <returns></returns>        public static long ConvertIPToLong(string ip)        {            string[] ips = ip.Split('.');            long number = 16777216L * long.Parse(ips[0]) + 65536L * long.Parse(ips[1]) + 256 * long.Parse(ips[2]) + long.Parse(ips[3]);            return number;        }          /// <summary>        /// 隐藏邮箱        /// </summary>        public static string HideEmail(string email)        {            int index = email.LastIndexOf('@');              if (index == 1)                return "*" + email.Substring(index);            if (index == 2)                return email[0] + "*" + email.Substring(index);              StringBuilder sb = new StringBuilder();            sb.Append(email.Substring(0, 2));            int count = index - 2;            while (count > 0)            {                sb.Append("*");                count--;            }            sb.Append(email.Substring(index));            return sb.ToString();        }          /// <summary>        /// 隐藏手机        /// </summary>        public static string HideMobile(string mobile)        {            if (mobile != null && mobile.Length > 10)                return mobile.Substring(0, 3) + "*****" + mobile.Substring(8);            return string.Empty;        }          /// <summary>        /// 数据转换为列表        /// </summary>        /// <param name="array">数组</param>        /// <returns></returns>        public static List<T> ArrayToList<T>(T[] array)        {            List<T> list = new List<T>(array.Length);            foreach (T item in array)                list.Add(item);            return list;        }          /// <summary>        /// DataTable转化为List        /// </summary>        /// <param name="dt">DataTable</param>        /// <returns></returns>        public static List<Dictionary<string, object>> DataTableToList(DataTable dt)        {            int columnCount = dt.Columns.Count;            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>(dt.Rows.Count);            foreach (DataRow dr in dt.Rows)            {                Dictionary<string, object> item = new Dictionary<string, object>(columnCount);                for (int i = 0; i < columnCount; i++)                {                    item.Add(dt.Columns[i].ColumnName, dr[i]);                }                list.Add(item);            }            return list;        }    }

　　

验证数据帮助类

 

using System;
using System.Text.RegularExpressions;

namespace ZMM.Core
{
    /// <summary>
    /// 验证帮助类
    /// </summary>
    public class ValidateHelper
    {
        //邮件正则表达式
        private static Regex _emailregex = new Regex(@"^[a-z0-9]([a-z0-9]*[-_]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[\.][a-z]{2,3}([\.][a-z]{2})?$", RegexOptions.IgnoreCase);
        //手机号正则表达式
        private static Regex _mobileregex = new Regex("^(13|15|17|18)[0-9]{9}$");
        //固话号正则表达式
        private static Regex _phoneregex = new Regex(@"^(\d{3,4}-?)?\d{7,8}$");
        //IP正则表达式
        private static Regex _ipregex = new Regex(@"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$");
        //日期正则表达式
        private static Regex _dateregex = new Regex(@"(\d{4})-(\d{1,2})-(\d{1,2})");
        //数值(包括整数和小数)正则表达式
        private static Regex _numericregex = new Regex(@"^[-]?[0-9]+(\.[0-9]+)?$");
        //邮政编码正则表达式
        private static Regex _zipcoderegex = new Regex(@"^\d{6}$");

        /// <summary>
        /// 是否为邮箱名
        /// </summary>
        public static bool IsEmail(string s)
        {
            if (string.IsNullOrEmpty(s))
                return true;
            return _emailregex.IsMatch(s);
        }

        /// <summary>
        /// 是否为手机号
        /// </summary>
        public static bool IsMobile(string s)
        {
            if (string.IsNullOrEmpty(s))
                return true;
            return _mobileregex.IsMatch(s);
        }

        /// <summary>
        /// 是否为固话号
        /// </summary>
        public static bool IsPhone(string s)
        {
            if (string.IsNullOrEmpty(s))
                return true;
            return _phoneregex.IsMatch(s);
        }

        /// <summary>
        /// 是否为IP
        /// </summary>
        public static bool IsIP(string s)
        {
            return _ipregex.IsMatch(s);
        }

        /// <summary>
        /// 是否是身份证号
        /// </summary>
        public static bool IsIdCard(string id)
        {
            if (string.IsNullOrEmpty(id))
                return true;
            if (id.Length == 18)
                return CheckIDCard18(id);
            else if (id.Length == 15)
                return CheckIDCard15(id);
            else
                return false;
        }

        /// <summary>
        /// 是否为18位身份证号
        /// </summary>
        private static bool CheckIDCard18(string Id)
        {
            long n = 0;
            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
                return false;//数字验证

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证

            string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证

            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
            char[] Ai = Id.Remove(17).ToCharArray();
            int sum = 0;
            for (int i = 0; i < 17; i++)
                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());

            int y = -1;
            Math.DivRem(sum, 11, out y);
            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
                return false;//校验码验证

            return true;//符合GB11643-1999标准
        }

        /// <summary>
        /// 是否为15位身份证号
        /// </summary>
        private static bool CheckIDCard15(string Id)
        {
            long n = 0;
            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
                return false;//数字验证

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证

            string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证

            return true;//符合15位身份证标准
        }

        /// <summary>
        /// 是否为日期
        /// </summary>
        public static bool IsDate(string s)
        {
            return _dateregex.IsMatch(s);
        }

        /// <summary>
        /// 是否是数值(包括整数和小数)
        /// </summary>
        public static bool IsNumeric(string numericStr)
        {
            return _numericregex.IsMatch(numericStr);
        }

        /// <summary>
        /// 是否为邮政编码
        /// </summary>
        public static bool IsZipCode(string s)
        {
            if (string.IsNullOrEmpty(s))
                return true;
            return _zipcoderegex.IsMatch(s);
        }

        /// <summary>
        /// 是否是图片文件名
        /// </summary>
        /// <returns> </returns>
        public static bool IsImgFileName(string fileName)
        {
            if (fileName.IndexOf(".") == -1)
                return false;

            string tempFileName = fileName.Trim().ToLower();
            string extension = tempFileName.Substring(tempFileName.LastIndexOf("."));
            return extension == ".png" || extension == ".bmp" || extension == ".jpg" || extension == ".jpeg" || extension == ".gif";
        }
        /// <summary>
        /// 是否是文件名word
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static bool IsFile(string fileName)
        {
            if (fileName.IndexOf(".") == -1)
                return false;

            string tempFileName = fileName.Trim().ToLower();
            string extension = tempFileName.Substring(tempFileName.LastIndexOf("."));
            return extension == ".doc" || extension == ".docx" || extension == ".xls" || extension == ".xlsx" || extension == ".txt";
        }

        /// <summary>
        /// 判断一个ip是否在另一个ip内
        /// </summary>
        /// <param name="sourceIP">检测ip</param>
        /// <param name="targetIP">匹配ip</param>
        /// <returns></returns>
        public static bool InIP(string sourceIP, string targetIP)
        {
            if (string.IsNullOrEmpty(sourceIP) || string.IsNullOrEmpty(targetIP))
                return false;

            string[] sourceIPBlockList = StringHelper.SplitString(sourceIP, @".");
            string[] targetIPBlockList = StringHelper.SplitString(targetIP, @".");

            int sourceIPBlockListLength = sourceIPBlockList.Length;

            for (int i = 0; i < sourceIPBlockListLength; i++)
            {
                if (targetIPBlockList[i] == "*")
                    return true;

                if (sourceIPBlockList[i] != targetIPBlockList[i])
                {
                    return false;
                }
                else
                {
                    if (i == 3)
                        return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 判断一个ip是否在另一个ip内
        /// </summary>
        /// <param name="sourceIP">检测ip</param>
        /// <param name="targetIPList">匹配ip列表</param>
        /// <returns></returns>
        public static bool InIPList(string sourceIP, string[] targetIPList)
        {
            if (targetIPList != null && targetIPList.Length > 0)
            {
                foreach (string targetIP in targetIPList)
                {
                    if (InIP(sourceIP, targetIP))
                        return true;
                }
            }
            return false;
        }

        /// <summary>
        /// 判断一个ip是否在另一个ip内
        /// </summary>
        /// <param name="sourceIP">检测ip</param>
        /// <param name="targetIPStr">匹配ip</param>
        /// <returns></returns>
        public static bool InIPList(string sourceIP, string targetIPStr)
        {
            string[] targetIPList = StringHelper.SplitString(targetIPStr, "\n");
            return InIPList(sourceIP, targetIPList);
        }

        /// <summary>
        /// 判断当前时间是否在指定的时间段内
        /// </summary>
        /// <param name="periodList">指定时间段</param>
        /// <param name="liePeriod">所处时间段</param>
        /// <returns></returns>
        public static bool BetweenPeriod(string[] periodList, out string liePeriod)
        {
            if (periodList != null && periodList.Length > 0)
            {
                DateTime startTime;
                DateTime endTime;
                DateTime nowTime = DateTime.Now;
                DateTime nowDate = nowTime.Date;

                foreach (string period in periodList)
                {
                    int index = period.IndexOf("-");
                    startTime = TypeHelper.StringToDateTime(period.Substring(0, index));
                    endTime = TypeHelper.StringToDateTime(period.Substring(index + 1));

                    if (startTime < endTime)
                    {
                        if (nowTime > startTime && nowTime < endTime)
                        {
                            liePeriod = period;
                            return true;
                        }
                    }
                    else
                    {
                        if ((nowTime > startTime && nowTime < nowDate.AddDays(1)) || (nowTime < endTime))
                        {
                            liePeriod = period;
                            return true;
                        }
                    }
                }
            }
            liePeriod = string.Empty;
            return false;
        }

        /// <summary>
        /// 判断当前时间是否在指定的时间段内
        /// </summary>
        /// <param name="periodStr">指定时间段</param>
        /// <param name="liePeriod">所处时间段</param>
        /// <returns></returns>
        public static bool BetweenPeriod(string periodStr, out string liePeriod)
        {
            string[] periodList = StringHelper.SplitString(periodStr, "\n");
            return BetweenPeriod(periodList, out liePeriod);
        }

        /// <summary>
        /// 判断当前时间是否在指定的时间段内
        /// </summary>
        /// <param name="periodList">指定时间段</param>
        /// <returns></returns>
        public static bool BetweenPeriod(string periodList)
        {
            string liePeriod = string.Empty;
            return BetweenPeriod(periodList, out liePeriod);
        }

        /// <summary>
        /// 是否是数值(包括整数和小数)
        /// </summary>
        public static bool IsNumericArray(string[] numericStrList)
        {
            if (numericStrList != null && numericStrList.Length > 0)
            {
                foreach (string numberStr in numericStrList)
                {
                    if (!IsNumeric(numberStr))
                        return false;
                }
                return true;
            }
            return false;
        }

        /// <summary>
        /// 是否是数值(包括整数和小数)
        /// </summary>
        public static bool IsNumericRule(string numericRuleStr, string splitChar)
        {
            return IsNumericArray(StringHelper.SplitString(numericRuleStr, splitChar));
        }

        /// <summary>
        /// 是否是数值(包括整数和小数)
        /// </summary>
        public static bool IsNumericRule(string numericRuleStr)
        {
            return IsNumericRule(numericRuleStr, ",");
        }
    }
}

IO帮助类

 

using System;
using System.IO;
using System.Web;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Xml.Serialization;

namespace ZMM.Core
{
    /// <summary>
    /// IO帮助类
    /// </summary>
    public class IOHelper
    {
        //是否已经加载了JPEG编码解码器
        private static bool _isloadjpegcodec = false;
        //当前系统安装的JPEG编码解码器
        private static ImageCodecInfo _jpegcodec = null;

        /// <summary>
        /// 获得文件物理路径
        /// </summary>
        /// <returns></returns>
        public static string GetMapPath(string path)
        {
            if (HttpContext.Current != null)
            {
                return HttpContext.Current.Server.MapPath(path);
            }
            else
            {
                return System.Web.Hosting.HostingEnvironment.MapPath(path);
            }
        }

        #region  序列化

        /// <summary>
        /// XML序列化
        /// </summary>
        /// <param name="obj">序列对象</param>
        /// <param name="filePath">XML文件路径</param>
        /// <returns>是否成功</returns>
        public static bool SerializeToXml(object obj, string filePath)
        {
            bool result = false;

            FileStream fs = null;
            try
            {
                fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(obj.GetType());
                serializer.Serialize(fs, obj);
                result = true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
            return result;

        }

        /// <summary>
        /// XML反序列化
        /// </summary>
        /// <param name="type">目标类型(Type类型)</param>
        /// <param name="filePath">XML文件路径</param>
        /// <returns>序列对象</returns>
        public static object DeserializeFromXML(Type type, string filePath)
        {
            FileStream fs = null;
            try
            {
                fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                XmlSerializer serializer = new XmlSerializer(type);
                return serializer.Deserialize(fs);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (fs != null)
                    fs.Close();
            }
        }

        #endregion

        #region  水印,缩略图

        /// <summary>
        /// 获得当前系统安装的JPEG编码解码器
        /// </summary>
        /// <returns></returns>
        public static ImageCodecInfo GetJPEGCodec()
        {
            if (_isloadjpegcodec == true)
                return _jpegcodec;

            ImageCodecInfo[] codecsList = ImageCodecInfo.GetImageEncoders();
            foreach (ImageCodecInfo codec in codecsList)
            {
                if (codec.MimeType.IndexOf("jpeg") > -1)
                {
                    _jpegcodec = codec;
                    break;
                }

            }
            _isloadjpegcodec = true;
            return _jpegcodec;
        }

        /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="imagePath">图片路径</param>
        /// <param name="thumbPath">缩略图路径</param>
        /// <param name="width">缩略图宽度</param>
        /// <param name="height">缩略图高度</param>
        /// <param name="mode">生成缩略图的方式</param>
        public static void GenerateThumb(string imagePath, string thumbPath, int width, int height, string mode)
        {
            Image image = Image.FromFile(imagePath);

            string extension = imagePath.Substring(imagePath.LastIndexOf(".")).ToLower();
            ImageFormat imageFormat = null;
            switch (extension)
            {
                case ".jpg":
                case ".jpeg":
                    imageFormat = ImageFormat.Jpeg;
                    break;
                case ".bmp":
                    imageFormat = ImageFormat.Bmp;
                    break;
                case ".png":
                    imageFormat = ImageFormat.Png;
                    break;
                case ".gif":
                    imageFormat = ImageFormat.Gif;
                    break;
                default:
                    imageFormat = ImageFormat.Jpeg;
                    break;
            }

            int toWidth = width > 0 ? width : image.Width;
            int toHeight = height > 0 ? height : image.Height;

            int x = 0;
            int y = 0;
            int ow = image.Width;
            int oh = image.Height;

            switch (mode)
            {
                case "HW"://指定高宽缩放（可能变形）
                    break;
                case "W"://指定宽，高按比例
                    toHeight = image.Height * width / image.Width;
                    break;
                case "H"://指定高，宽按比例
                    toWidth = image.Width * height / image.Height;
                    break;
                case "Cut"://指定高宽裁减（不变形）
                    if ((double)image.Width / (double)image.Height > (double)toWidth / (double)toHeight)
                    {
                        oh = image.Height;
                        ow = image.Height * toWidth / toHeight;
                        y = 0;
                        x = (image.Width - ow) / 2;
                    }
                    else
                    {
                        ow = image.Width;
                        oh = image.Width * height / toWidth;
                        x = 0;
                        y = (image.Height - oh) / 2;
                    }
                    break;
                default:
                    break;
            }

            //新建一个bmp
            Image bitmap = new Bitmap(toWidth, toHeight);

            //新建一个画板
            Graphics g = Graphics.FromImage(bitmap);

            //设置高质量插值法
            g.InterpolationMode = InterpolationMode.High;

            //设置高质量,低速度呈现平滑程度
            g.SmoothingMode = SmoothingMode.HighQuality;

            //清空画布并以透明背景色填充
            g.Clear(Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分
            g.DrawImage(image,
                        new Rectangle(0, 0, toWidth, toHeight),
                        new Rectangle(x, y, ow, oh),
                        GraphicsUnit.Pixel);

            try
            {
                bitmap.Save(thumbPath, imageFormat);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (g != null)
                    g.Dispose();
                if (bitmap != null)
                    bitmap.Dispose();
                if (image != null)
                    image.Dispose();
            }
        }

        /// <summary>
        /// 生成图片水印
        /// </summary>
        /// <param name="originalPath">源图路径</param>
        /// <param name="watermarkPath">水印图片路径</param>
        /// <param name="targetPath">保存路径</param>
        /// <param name="position">位置</param>
        /// <param name="opacity">透明度</param>
        /// <param name="quality">质量</param>
        public static void GenerateImageWatermark(string originalPath, string watermarkPath, string targetPath, int position, int opacity, int quality)
        {
            Image originalImage = null;
            Image watermarkImage = null;
            //图片属性
            ImageAttributes attributes = null;
            //画板
            Graphics g = null;
            try
            {

                originalImage = Image.FromFile(originalPath);
                watermarkImage = new Bitmap(watermarkPath);

                if (watermarkImage.Height >= originalImage.Height || watermarkImage.Width >= originalImage.Width)
                {
                    originalImage.Save(targetPath);
                    return;
                }

                if (quality < 0 || quality > 100)
                    quality = 80;

                //水印透明度
                float iii;
                if (opacity > 0 && opacity <= 10)
                    iii = (float)(opacity / 10.0F);
                else
                    iii = 0.5F;

                //水印位置
                int x = 0;
                int y = 0;
                switch (position)
                {
                    case 1:
                        x = (int)(originalImage.Width * (float).01);
                        y = (int)(originalImage.Height * (float).01);
                        break;
                    case 2:
                        x = (int)((originalImage.Width * (float).50) - (watermarkImage.Width / 2));
                        y = (int)(originalImage.Height * (float).01);
                        break;
                    case 3:
                        x = (int)((originalImage.Width * (float).99) - (watermarkImage.Width));
                        y = (int)(originalImage.Height * (float).01);
                        break;
                    case 4:
                        x = (int)(originalImage.Width * (float).01);
                        y = (int)((originalImage.Height * (float).50) - (watermarkImage.Height / 2));
                        break;
                    case 5:
                        x = (int)((originalImage.Width * (float).50) - (watermarkImage.Width / 2));
                        y = (int)((originalImage.Height * (float).50) - (watermarkImage.Height / 2));
                        break;
                    case 6:
                        x = (int)((originalImage.Width * (float).99) - (watermarkImage.Width));
                        y = (int)((originalImage.Height * (float).50) - (watermarkImage.Height / 2));
                        break;
                    case 7:
                        x = (int)(originalImage.Width * (float).01);
                        y = (int)((originalImage.Height * (float).99) - watermarkImage.Height);
                        break;
                    case 8:
                        x = (int)((originalImage.Width * (float).50) - (watermarkImage.Width / 2));
                        y = (int)((originalImage.Height * (float).99) - watermarkImage.Height);
                        break;
                    case 9:
                        x = (int)((originalImage.Width * (float).99) - (watermarkImage.Width));
                        y = (int)((originalImage.Height * (float).99) - watermarkImage.Height);
                        break;
                }

                //颜色映射表
                ColorMap colorMap = new ColorMap();
                colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
                colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
                ColorMap[] newColorMap = { colorMap };

                //颜色变换矩阵,iii是设置透明度的范围0到1中的单精度类型
                float[][] newColorMatrix ={
                                            new float[] {1.0f,  0.0f,  0.0f,  0.0f, 0.0f},
                                            new float[] {0.0f,  1.0f,  0.0f,  0.0f, 0.0f},
                                            new float[] {0.0f,  0.0f,  1.0f,  0.0f, 0.0f},
                                            new float[] {0.0f,  0.0f,  0.0f,  iii, 0.0f},
                                            new float[] {0.0f,  0.0f,  0.0f,  0.0f, 1.0f}
                                           };
                //定义一个 5 x 5 矩阵
                ColorMatrix matrix = new ColorMatrix(newColorMatrix);

                //图片属性
                attributes = new ImageAttributes();
                attributes.SetRemapTable(newColorMap, ColorAdjustType.Bitmap);
                attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);

                //画板
                g = Graphics.FromImage(originalImage);
                //绘制水印
                g.DrawImage(watermarkImage, new Rectangle(x, y, watermarkImage.Width, watermarkImage.Height), 0, 0, watermarkImage.Width, watermarkImage.Height, GraphicsUnit.Pixel, attributes);
                //保存图片
                EncoderParameters encoderParams = new EncoderParameters();
                encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, new long[] { quality });
                if (GetJPEGCodec() != null)
                    originalImage.Save(targetPath, _jpegcodec, encoderParams);
                else
                    originalImage.Save(targetPath);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (g != null)
                    g.Dispose();
                if (attributes != null)
                    attributes.Dispose();
                if (watermarkImage != null)
                    watermarkImage.Dispose();
                if (originalImage != null)
                    originalImage.Dispose();
            }
        }

        /// <summary>
        /// 生成文字水印
        /// </summary>
        /// <param name="originalPath">源图路径</param>
        /// <param name="targetPath">保存路径</param>
        /// <param name="text">水印文字</param>
        /// <param name="textSize">文字大小</param>
        /// <param name="textFont">文字字体</param>
        /// <param name="position">位置</param>
        /// <param name="quality">质量</param>
        public static void GenerateTextWatermark(string originalPath, string targetPath, string text, int textSize, string textFont, int position, int quality)
        {
            Image originalImage = null;
            //画板
            Graphics g = null;
            try
            {
                originalImage = Image.FromFile(originalPath);
                //画板
                g = Graphics.FromImage(originalImage);
                if (quality < 0 || quality > 100)
                    quality = 80;

                Font font = new Font(textFont, textSize, FontStyle.Regular, GraphicsUnit.Pixel);
                SizeF sizePair = g.MeasureString(text, font);

                float x = 0;
                float y = 0;

                switch (position)
                {
                    case 1:
                        x = (float)originalImage.Width * (float).01;
                        y = (float)originalImage.Height * (float).01;
                        break;
                    case 2:
                        x = ((float)originalImage.Width * (float).50) - (sizePair.Width / 2);
                        y = (float)originalImage.Height * (float).01;
                        break;
                    case 3:
                        x = ((float)originalImage.Width * (float).99) - sizePair.Width;
                        y = (float)originalImage.Height * (float).01;
                        break;
                    case 4:
                        x = (float)originalImage.Width * (float).01;
                        y = ((float)originalImage.Height * (float).50) - (sizePair.Height / 2);
                        break;
                    case 5:
                        x = ((float)originalImage.Width * (float).50) - (sizePair.Width / 2);
                        y = ((float)originalImage.Height * (float).50) - (sizePair.Height / 2);
                        break;
                    case 6:
                        x = ((float)originalImage.Width * (float).99) - sizePair.Width;
                        y = ((float)originalImage.Height * (float).50) - (sizePair.Height / 2);
                        break;
                    case 7:
                        x = (float)originalImage.Width * (float).01;
                        y = ((float)originalImage.Height * (float).99) - sizePair.Height;
                        break;
                    case 8:
                        x = ((float)originalImage.Width * (float).50) - (sizePair.Width / 2);
                        y = ((float)originalImage.Height * (float).99) - sizePair.Height;
                        break;
                    case 9:
                        x = ((float)originalImage.Width * (float).99) - sizePair.Width;
                        y = ((float)originalImage.Height * (float).99) - sizePair.Height;
                        break;
                }

                g.DrawString(text, font, new SolidBrush(Color.White), x + 1, y + 1);
                g.DrawString(text, font, new SolidBrush(Color.Black), x, y);

                //保存图片
                EncoderParameters encoderParams = new EncoderParameters();
                encoderParams.Param[0] = new EncoderParameter(Encoder.Quality, new long[] { quality });
                if (GetJPEGCodec() != null)
                    originalImage.Save(targetPath, _jpegcodec, encoderParams);
                else
                    originalImage.Save(targetPath);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (g != null)
                    g.Dispose();
                if (originalImage != null)
                    originalImage.Dispose();
            }
        }

        #endregion
    }
}

c# Lambda操作类封装

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

namespace EasyFrame.Common
{
    public static class LambdaCommon
    {
        #region 表达式工具
        /// <summary>
        /// 相当于&&操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisFilter">已生成的过滤条件</param>
        /// <param name="otherFilter">未生成的过滤条件</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoAndAlso(this Expression thisFilter, Expression otherFilter)
        {
            return Expression.AndAlso(thisFilter, otherFilter);
        }
        /// <summary>
        /// 相当于||操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisFilter">已生成的过滤条件</param>
        /// <param name="otherFilter">未生成的过滤条件</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoOrElse(this Expression thisFilter, Expression otherFilter)
        {
            return Expression.OrElse(thisFilter, otherFilter);
        }
        /// <summary>
        /// 相当于==操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoEqual(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            return Expression.Equal(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue));
        }
        /// <summary>
        /// 相当于>=操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoGreaterThanOrEqual<T>(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //大于或等于
            return Expression.GreaterThanOrEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(T)));
        }
        /// <summary>
        /// 相当于小于等于操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoLessThanOrEqual<T>(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //小于或等于
            return Expression.LessThanOrEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(T)));
        }
        /// <summary>
        /// 相当于!=操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoNotEqual(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            return Expression.NotEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue));
        }

        /// <summary>
        /// 相当于>=操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoGreaterThanOrEqual(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //大于或等于
            return Expression.GreaterThanOrEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue));
        }
        /// <summary>
        /// 相当于>操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoGreaterThan<T>(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //大于
            return Expression.GreaterThan(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(T)));
        }
        /// <summary>
        /// 相当于小于操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoLessThan<T>(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //小于
            return Expression.LessThan(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(T)));
        }
        /// <summary>
        /// 相当于>=操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoGreaterThanOrEqualByDateTime(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //大于或等于
            return Expression.GreaterThanOrEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(DateTime?)));
        }
        /// <summary>
        /// 字符串包含
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoContains(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            return Expression.Call(Expression.Property(thisParameterExpression, propertieName), typeof(string).GetMethod("Contains"), Expression.Constant(propertieValue));
        }

        /// <summary>
        /// 相当于小于或等于操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoLessThanOrEqualByDateTime(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //小于或等于
            return Expression.LessThanOrEqual(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(DateTime?)));
        }
        /// <summary>
        /// 相当于>操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoGreaterThanByDateTime(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //大于
            return Expression.GreaterThan(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(DateTime?)));
        }
        /// <summary>
        /// 相当于小于操作
        /// ——Author：hellthinker
        /// </summary>
        /// <param name="thisParameterExpression">查询对象</param>
        /// <param name="propertieName">属性名称</param>
        /// <param name="propertieValue">属性值</param>
        /// <returns>新的过滤</returns>
        public static Expression GotoLessThanByDateTime(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            //小于
            return Expression.LessThan(Expression.Property(thisParameterExpression, propertieName), Expression.Constant(propertieValue, typeof(DateTime?)));
        }
        /// <summary>
        /// 包含操作 相当余 a=> arr.Contains(a.ID)
        /// </summary>
        /// <param name="thisParameterExpression"></param>
        /// <param name="propertieName"></param>
        /// <param name="propertieValue"></param>
        /// <returns></returns>
        public static Expression ContainsOperations(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            MethodInfo method = null;
            MemberExpression member = Expression.Property(thisParameterExpression, propertieName);
            var containsMethods = typeof(Enumerable).GetMethods(BindingFlags.Static | BindingFlags.Public).Where(m => m.Name == "Contains");
            foreach (var m in containsMethods)
            {
                if (m.GetParameters().Count() == 2)
                {
                    method = m;
                    break;
                }
            }
            method = method.MakeGenericMethod(member.Type);
            var exprContains = Expression.Call(method, new Expression[] { Expression.Constant(propertieValue), member });
            return exprContains;
        }

        /// <summary>
        /// 包含操作 相当于  a=>a.ID.Contains(key)
        /// </summary>
        /// <param name="thisParameterExpression"></param>
        /// <param name="propertieName"></param>
        /// <param name="propertieValue"></param>
        /// <returns></returns>
        public static Expression Contains(this ParameterExpression thisParameterExpression, string propertieName, object propertieValue)
        {
            var propertyExp = Expression.Property(thisParameterExpression, propertieName);
            MethodInfo method = typeof(string).GetMethod("Contains", new[] { typeof(string) });
            var someValue = Expression.Constant(propertieValue, typeof(string));
            var containsMethodExp = Expression.Call(propertyExp, method, someValue);
            return containsMethodExp;
        }
        #endregion
    }
}

C# -- 使用反射（Reflect）获取dll文件中的类型并调用方法

使用反射（Reflect）获取dll文件中的类型并调用方法

需引用：System.Reflection;

1. 使用反射（Reflect）获取dll文件中的类型并调用方法（入门案例）

 1         static void Main(string[] args)
 2         {
 3             //dll文件路径
 4             string path = @"D:\VS2015Project\001\Computer\bin\Debug\computer.dll";
 5
 6             //加载dll文件
 7             Assembly asm = Assembly.LoadFile(path);
 8
 9             //获取类
10             Type type = asm.GetType("Computer.Computer");
11
12             //创建该类型的实例
13             object obj = Activator.CreateInstance(type);
14
15             //获取该类的方法
16             MethodInfo mf = type.GetMethod("ShowDrives");
17
18             //调用方法
19             mf.Invoke(obj, null);
20
21             Console.ReadKey();
22         }

2. 生成类库(computer.dll)的computer.cs文件代码

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.Linq;
 5 using System.Text;
 6
 7
 8 namespace Computer
 9 {
10     public class Computer
11     {
12         private DriveInfo[] drives;
13         public Computer()
14         {
15             this.drives = DriveInfo.GetDrives();
16         }
17         public void ShowDrives()
18         {
19             Console.WriteLine("该电脑的磁盘驱动器有：\r\n");
20             foreach (var item in drives)
21             {
22                 Console.WriteLine(item);
23             }
24         }
25     }
26 }

3. 反射调用结果：

C# -- 文件的压缩与解压（GZipStream）

文件的压缩与解压

需引入 System.IO.Compression;

1.C#代码（入门案例）

 1             Console.WriteLine("压缩文件...............");
 2             using (FileStream fr = File.OpenRead("d:\\test.txt"))
 3             {
 4                 using (FileStream fw = File.OpenWrite("d:\\test.zip"))
 5                 {
 6                     using (GZipStream gz = new GZipStream(fw, CompressionMode.Compress))
 7                     {
 8
 9                         byte[] by = new byte[1024 * 1024];
10                         int r = fr.Read(by, 0, by.Length);
11                         while (r > 0)
12                         {
13                             gz.Write(by, 0, r);
14                             r = fr.Read(by, 0, r);
15                         }
16                     }
17                 }
18             }
19             Console.WriteLine("压缩完成。");
20
21
22             Console.WriteLine("解压文件...............");
23             using (FileStream fr = File.OpenRead("d:\\test.zip"))
24             {
25                 using (GZipStream gz = new GZipStream(fr, CompressionMode.Decompress))
26                 {
27                     using (FileStream fw = File.OpenWrite("d:\\test2.txt"))
28                     {
29
30                         byte[] by = new byte[1024 * 1024];
31                         int r = gz.Read(by, 0, by.Length);
32                         while (r > 0)
33                         {
34                             fw.Write(by, 0, r);
35                             r = gz.Read(by, 0, r);
36                         }
37                     }
38                 }
39             }
40             Console.WriteLine("解压完成。");
41
42             Console.ReadKey();

2. 运行结果