C# 压缩 解压 复制文件夹,文件的操作

命名空间：namespace System.IO.Compression

压缩：

//目标文件夹
            string fileDirPath = "/Downloads/试题" + userId + "_" + courseId;
            string downPath = Server.MapPath(fileDirPath);
            if (!Directory.Exists(downPath))
            {
                Directory.CreateDirectory(downPath);
            }
            System.IO.File.SetAttributes(downPath, FileAttributes.Normal);

//压缩文件
            string filePathZIP = Server.MapPath(fileDirPath) + ".zip";  //压缩文件夹
            if (System.IO.File.Exists(filePathZIP))
            {
                System.IO.File.Delete(filePathZIP);
            }
            System.IO.File.SetAttributes(downPath, FileAttributes.Normal);
            ZipFile.CreateFromDirectory(downPath, filePathZIP, CompressionLevel.Optimal, true);//压缩文件
            if (System.IO.Directory.Exists(downPath))
            {
                System.IO.Directory.Delete(downPath, true);    //删除原文件夹
            }
            return File(filePathZIP, "application/octet-stream", "试题" + "_" + userId + "_" + courseId + ".zip");

解压：

                HttpPostedFileBase fileBase = Request.Files["fileImport"];
                string fileName = Path.GetFileName(fileBase.FileName);
                string fileNameNoExt = Path.GetFileNameWithoutExtension(fileBase.FileName);
                string extension = Path.GetExtension(fileName);
                if (extension.ToLower() != ".zip") //extension.ToLower() != ".xls" || extension.ToLower() != ".xlsx" ||
                {
                    //window.location.href='@Url.Action('CoursePackManage','ManageCourse')'  window.location.href='/admin/ManageCourse/CoursePackManage';
                    return Content("<script type='text/javascript'>alert('请上传zip格式的压缩文件');window.location.href='/admin/ManageCourse/CoursePackManage';</script>");
                }

                string filePath = "/UploadFile/试题/"; // +DateTime.Now.ToString("yyyyMMdd") + "/";

                if (!Directory.Exists(Server.MapPath(filePath))) //文件夹
                {
                    Directory.CreateDirectory(Server.MapPath(filePath));
                }
                string nowTime = DateTime.Now.ToString("yyyyMMddHHmmssfff");
                string fullFileName = Server.MapPath(filePath + nowTime + "_" + userId + "_" + courseId + "_" + fileName);//文件名
                fileBase.SaveAs(fullFileName);

#region 压缩包

            if (extension.ToLower() == ".zip")
            {
                string destFilePath = Server.MapPath(filePath + nowTime + "_" + userId + "_" + courseId + "_" + fileNameNoExt); //不带后缀文件名字
                if (!Directory.Exists(destFilePath)) //文件夹
                {
                    Directory.CreateDirectory(destFilePath);
                }
                ZipFile.ExtractToDirectory(fullFileName, destFilePath, Encoding.Default); //解压文件

                System.IO.File.Delete(fullFileName);//解压后删除文件

                #region 复制文件夹

                DirectoryInfo sourceDir = new System.IO.DirectoryInfo(destFilePath);
                //处理文件夹
                foreach (var item in sourceDir.GetDirectories())    //一级目录
                {
                    foreach (var childDir in item.GetDirectories()) //二级目录
                    {
                        if (childDirName.Equals("文件夹名", StringComparison.CurrentCultureIgnoreCase))
                        {
                            CopyDirectory(childFullName, destDirName);   //复制文件夹
                        }
                    }
                }

                #endregion
            }

            #endregion

//获得目录下所有文件和子目录
使用DirectoryInfo类的GetFileSystemInfos()方法。

//获得目录下所有目录
string[] dirs = Directory.GetDirectories(你的目录的完整路径, "*", SearchOption.AllDirectories);
//获得目录下所有文件(包括该目录下的子目录的文件)
string[] dirs1 = Directory.GetFiles(你的目录的完整路径, "*.*", SearchOption.AllDirectories);
//该目录下的子目录和文件
var fileEntrys = System.IO.Directory.GetFileSystemEntries(filePath);
//获得一个目录下所有文件
string[] strNames = Directory.GetFiles(你的目录的完整路径);

目录下的子目录和文件

using ICSharpCode.SharpZipLib.Zip; 压缩文件

       /// <summary>
        /// ZIP压缩单个文件
        /// </summary>
        /// <param name="sFileToZip">需要压缩的文件（绝对路径）</param>
        /// <param name="sZippedPath">压缩后的文件路径（绝对路径）</param>
        /// <param name="sZippedFileName">压缩后的文件名称（文件名，默认 同源文件同名）</param>
        /// <param name="nCompressionLevel">压缩等级（0 无 - 9 最高，默认 5）</param>
        /// <param name="nBufferSize">缓存大小（每次写入文件大小，默认 2048）</param>
        /// <param name="bEncrypt">是否加密（默认 加密）</param>
        /// <param name="sPassword">密码（设置加密时生效。默认密码为"123"）</param>
        public static string ZipFile(string sFileToZip, string sZippedPath, string sZippedFileName = "", int nCompressionLevel = , int nBufferSize = , bool bEncrypt = true,string sPassword="")
        {
            if (!File.Exists(sFileToZip))
            {
                return null;
            }
            string sZipFileName = string.IsNullOrEmpty(sZippedFileName) ? sZippedPath + "\\" + new FileInfo(sFileToZip).Name.Substring(, new FileInfo(sFileToZip).Name.LastIndexOf('.')) + ".zip" : sZippedPath + "\\" + sZippedFileName + ".zip";
            using (FileStream aZipFile = File.Create(sZipFileName))
            {
                using (ZipOutputStream aZipStream = new ZipOutputStream(aZipFile))
                {
                    using (FileStream aStreamToZip = new FileStream(sFileToZip, FileMode.Open, FileAccess.Read))
                    {
                        string sFileName = sFileToZip.Substring(sFileToZip.LastIndexOf("\\") + );
                        ZipEntry ZipEntry = new ZipEntry(sFileName);
                        if (bEncrypt)
                        {
                            aZipStream.Password = sPassword;
                        }
                        aZipStream.PutNextEntry(ZipEntry);
                        aZipStream.SetLevel(nCompressionLevel);
                        byte[] buffer = new byte[nBufferSize];
                        int sizeRead = ;
                        try
                        {
                            do
                            {
                                sizeRead = aStreamToZip.Read(buffer, , buffer.Length);
                                aZipStream.Write(buffer, , sizeRead);
                            }
                            while (sizeRead > );
                        }
                        catch (Exception ex)
                        {
                            throw ex;
                        }
                        aStreamToZip.Close();
                    }
                    aZipStream.Finish();
                    aZipStream.Close();
                }
                aZipFile.Close();
            }
            return sZipFileName;
        }

ZIP压缩单个文件

https://www.cnblogs.com/xuhongfei/p/5604193.html

http://www.cnblogs.com/ForRickHuan/p/7348221.html

复制文件夹：

/// <summary>
        /// 复制文件夹
        /// </summary>
        /// <param name="sourceDirName">源文件</param>
        /// <param name="destDirName">目标文件</param>
        private void CopyDirectory(string sourceDirName, string destDirName)
        {
            try
            {
                if (!Directory.Exists(destDirName))
                {
                    Directory.CreateDirectory(destDirName);
                    System.IO.File.SetAttributes(destDirName, System.IO.File.GetAttributes(sourceDirName));
                }

                if (destDirName[destDirName.Length - ] != Path.DirectorySeparatorChar) //  =="\\"
                {
                    destDirName = destDirName + Path.DirectorySeparatorChar;
                }
                string[] files = Directory.GetFiles(sourceDirName);
                foreach (string file in files)
                {
                    if (System.IO.File.Exists(destDirName + Path.GetFileName(file)))
                        continue;
                    System.IO.File.Copy(file, destDirName + Path.GetFileName(file), true);
                    System.IO.File.SetAttributes(destDirName + Path.GetFileName(file), FileAttributes.Normal);
                    //total++;
                }

                string[] dirs = Directory.GetDirectories(sourceDirName);//包括路径
                foreach (string dir in dirs)
                {
                    CopyDirectory(dir, destDirName + Path.GetFileName(dir));
                }
            }
            catch (Exception ex)
            {
                //StreamWriter sw = new StreamWriter(AppDomain.CurrentDomain.BaseDirectory + "\\log.txt", true);    //System.Web.Providers.Entities
                //sw.Write(ex.Message + "     " + DateTime.Now + "\r\n");
                //sw.Close();
            }

        }

文件属性：

C#遍历指定文件夹中的所有文件
DirectoryInfo TheFolder=new DirectoryInfo(folderFullName);
//遍历文件夹
foreach(DirectoryInfo NextFolder in TheFolder.GetDirectories())
   this.listBox1.Items.Add(NextFolder.Name);
//遍历文件
foreach(FileInfo NextFile in TheFolder.GetFiles())
   this.listBox2.Items.Add(NextFile.Name); 

===================================================================

如何获取指定目录包含的文件和子目录
    . DirectoryInfo.GetFiles()：获取目录中（不包含子目录）的文件，返回类型为FileInfo[]，支持通配符查找；
    . DirectoryInfo.GetDirectories()：获取目录（不包含子目录）的子目录，返回类型为DirectoryInfo[]，支持通配符查找；
    . DirectoryInfo. GetFileSystemInfos()：获取指定目录下（不包含子目录）的文件和子目录，返回类型为FileSystemInfo[]，支持通配符查找；
如何获取指定文件的基本信息；
    FileInfo.Exists：获取指定文件是否存在；
    FileInfo.Name，FileInfo.Extensioin：获取文件的名称和扩展名；
    FileInfo.FullName：获取文件的全限定名称（完整路径）；
    FileInfo.Directory：获取文件所在目录，返回类型为DirectoryInfo；
    FileInfo.DirectoryName：获取文件所在目录的路径（完整路径）；
    FileInfo.Length：获取文件的大小（字节数）；
    FileInfo.IsReadOnly：获取文件是否只读；
    FileInfo.Attributes：获取或设置指定文件的属性，返回类型为FileAttributes枚举，可以是多个值的组合
    FileInfo.CreationTime、FileInfo.LastAccessTime、FileInfo.LastWriteTime：分别用于获取文件的创建时间、访问时间、修改时间；

C#文件及文件夹操作示例  http://www.cnblogs.com/terer/articles/1514601.html

//1.---------文件夹创建、移动、删除---------

//创建文件夹
Directory.CreateDirectory(Server.MapPath("a"));
Directory.CreateDirectory(Server.MapPath("b"));
Directory.CreateDirectory(Server.MapPath("c"));
//移动b到a
Directory.Move(Server.MapPath("b"), Server.MapPath("a\\b"));
//删除c
Directory.Delete(Server.MapPath("c"));

//2.---------文件创建、复制、移动、删除---------

//创建文件
//使用File.Create创建再复制/移动/删除时会提示：文件正由另一进程使用,因此该进程无法访问该文件
//改用 FileStream 获取 File.Create 返回的 System.IO.FileStream 再进行关闭就无此问题
FileStream fs;
fs = File.Create(Server.MapPath("a.txt"));
fs.Close();
fs = File.Create(Server.MapPath("b.txt"));
fs.Close();
fs = File.Create(Server.MapPath("c.txt"));
fs.Close();
//复制文件
File.Copy(Server.MapPath("a.txt"), Server.MapPath("a\\a.txt"));
//移动文件
File.Move(Server.MapPath("b.txt"), Server.MapPath("a\\b.txt"));
File.Move(Server.MapPath("c.txt"), Server.MapPath("a\\c.txt"));
//删除文件
File.Delete(Server.MapPath("a.txt"));

//3.---------遍历文件夹中的文件和子文件夹并显示其属性---------

if(Directory.Exists(Server.MapPath("a")))
{
    //所有子文件夹
    foreach(string item in Directory.GetDirectories(Server.MapPath("a")))
    {
        Response.Write("<b>文件夹：" + item + "</b><br/>");
        DirectoryInfo directoryinfo = new DirectoryInfo(item);
        Response.Write("名称：" + directoryinfo.Name + "<br/>");
        Response.Write("路径：" + directoryinfo.FullName + "<br/>");
        Response.Write("创建时间：" + directoryinfo.CreationTime + "<br/>");
        Response.Write("上次访问时间：" + directoryinfo.LastAccessTime + "<br/>");
        Response.Write("上次修改时间：" + directoryinfo.LastWriteTime + "<br/>");
        Response.Write("父文件夹：" + directoryinfo.Parent + "<br/>");
        Response.Write("所在根目录：" + directoryinfo.Root + "<br/>");
        Response.Write("<br/>");
    }

    //所有子文件
    foreach (string item in Directory.GetFiles(Server.MapPath("a")))
    {
        Response.Write("<b>文件：" + item + "</b><br/>");
        FileInfo fileinfo = new FileInfo(item);
        Response.Write("名称：" + fileinfo.Name + "<br/>");
        Response.Write("扩展名：" + fileinfo.Extension +"<br/>");
        Response.Write("路径：" + fileinfo.FullName +"<br/>");
        Response.Write("大小：" + fileinfo.Length +"<br/>");
        Response.Write("创建时间：" + fileinfo.CreationTime +"<br/>");
        Response.Write("上次访问时间：" + fileinfo.LastAccessTime +"<br/>");
        Response.Write("上次修改时间：" + fileinfo.LastWriteTime +"<br/>");
        Response.Write("所在文件夹：" + fileinfo.DirectoryName +"<br/>");
        Response.Write("文件属性：" + fileinfo.Attributes +"<br/>");
        Response.Write("<br/>");
    }
}

//4.---------文件读写---------

if (File.Exists(Server.MapPath("a\\a.txt")))
{
    StreamWriter streamwrite = new StreamWriter(Server.MapPath("a\\a.txt"));
    streamwrite.WriteLine("木子屋");
    streamwrite.WriteLine("http://www.mzwu.com/");
    streamwrite.Write("2008-04-13");
    streamwrite.Close();

    StreamReader streamreader = new StreamReader(Server.MapPath("a\\a.txt"));
    Response.Write(streamreader.ReadLine());
    Response.Write(streamreader.ReadToEnd());
    streamreader.Close();
}

C#操作目录和文件  http://www.cnblogs.com/wanghonghu/archive/2012/07/04/2574579.html

zip文件的创建、读写和更新:  http://www.cnblogs.com/tcjiaan/p/4877020.html

动态生成zip文件: http://www.cnblogs.com/tcjiaan/p/4892578.html