C#.net 微信公众账号接口开发

微信越来越火，微信公众平台成为开发成新宠，本文用C#.net开发微信公众信号接口。

微信接口地址代码:

weixin _wx = new weixin();

string postStr = "";

if (Request.HttpMethod.ToLower() == "post")

{

Stream s = System.Web.HttpContext.Current.Request.InputStream;

byte[] b = new byte[s.Length];

s.Read(b, 0, (int)s.Length);

postStr = Encoding.UTF8.GetString(b);

if (!string.IsNullOrEmpty(postStr)) //请求处理

{

_wx.Handle(postStr);

}

else

{

_wx.Auth();

}

微信处理类：

public class weixin

{

private string Token = "weixin_token"; //换成自己的token

public void Auth()

{

string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"];

if (CheckSignature())

{

if (!string.IsNullOrEmpty(echoStr))

{

System.Web.HttpContext.Current.Response.Write(echoStr);

System.Web.HttpContext.Current.Response.End();

}

public void Handle(string postStr)

{

//封装请求类

XmlDocument doc = new XmlDocument();

doc.LoadXml(postStr);

XmlElement rootElement = doc.DocumentElement;

XmlNode MsgType = rootElement.SelectSingleNode("MsgType");

RequestXML requestXML = new RequestXML();

requestXML.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;

requestXML.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;

requestXML.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;

requestXML.MsgType = MsgType.InnerText;

if (requestXML.MsgType == "text")

{

requestXML.Content = rootElement.SelectSingleNode("Content").InnerText;

}

else if (requestXML.MsgType == "location")

{

requestXML.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;

requestXML.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;

requestXML.Scale = rootElement.SelectSingleNode("Scale").InnerText;

requestXML.Label = rootElement.SelectSingleNode("Label").InnerText;

}

else if (requestXML.MsgType == "image")

{

requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;

}

//回复消息

ResponseMsg(requestXML);

}

/// <summary>

/// 验证微信签名

/// </summary>

/// * 将token、timestamp、nonce三个参数进行字典序排序

/// * 将三个参数字符串拼接成一个字符串进行sha1加密

/// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。

/// <returns></returns>

private bool CheckSignature()

{

string signature = System.Web.HttpContext.Current.Request.QueryString["signature"];

string timestamp = System.Web.HttpContext.Current.Request.QueryString["timestamp"];

string nonce = System.Web.HttpContext.Current.Request.QueryString["nonce"];

string[] ArrTmp = { Token, timestamp, nonce };

Array.Sort(ArrTmp); //字典排序

string tmpStr = string.Join("", ArrTmp);

tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");

tmpStr = tmpStr.ToLower();

if (tmpStr == signature)

{

return true;

}

else

{

return false;

}

/// <summary>

/// 回复消息(微信信息返回)

/// </summary>

/// <param name="weixinXML"></param>

private void ResponseMsg(RequestXML requestXML)

{

try

{

string resxml = "";

mijiya mi = new mijiya(requestXML.Content,requestXML.FromUserName);

if (requestXML.MsgType == "text")

{

//在这里执行一系列操作，从而实现自动回复内容.

string _reMsg = mi.GetReMsg();

if (mi.msgType == 1)

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>2</ArticleCount><Articles>";

resxml += mi.GetRePic(requestXML.FromUserName);

resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";

}

else

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" + _reMsg + "]]></Content><FuncFlag>1</FuncFlag></xml>";

}

else if (requestXML.MsgType == "location")

{

string city = GetMapInfo(requestXML.Location_X, requestXML.Location_Y);

if (city == "0")

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";

}

else

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";

}

else if (requestXML.MsgType == "image")

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";

//返回10以内条

//int size = 10;

//resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>" + size + "</ArticleCount><Articles>";

//List<string> list = new List<string>();

////假如有20条查询的返回结果

//for (int i = 0; i < 20; i++)

//{

// list.Add("1");

//}

//string[] piclist = new string[] { "/Abstract_Pencil_Scribble_Background_Vector_main.jpg", "/balloon_tree.jpg", "/bloom.jpg", "/colorful_flowers.jpg", "/colorful_summer_flower.jpg", "/fall.jpg", "/fall_tree.jpg", "/growing_flowers.jpg", "/shoes_illustration.jpg", "/splashed_tree.jpg" };

//for (int i = 0; i < size && i < list.Count; i++)

//{

// resxml += "<item><Title><![CDATA[沈阳-黑龙江]]></Title><Description><![CDATA[元旦特价：￥300 市场价：￥400]]></Description><PicUrl><![CDATA[" + "http://www.hougelou.com" + piclist[i] + "]]></PicUrl><Url><![CDATA[http://www.hougelou.com]]></Url></item>";

//}

//resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";

}

else if (wx_tmsg.GetMsgCount(requestXML.FromUserName) == 0)

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" + mi.GetFirst() + "]]></Content><FuncFlag>1</FuncFlag></xml>";

}

else

{

resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";

}

//WriteTxt(resxml);

System.Web.HttpContext.Current.Response.Write(resxml);

WriteToDB(requestXML, resxml,mi.pid);

}

catch (Exception ex)

{

//WriteTxt("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());

wx_logs.MyInsert("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());

}

/// <summary>

/// unix时间转换为datetime

/// </summary>

/// <param name="timeStamp"></param>

/// <returns></returns>

private DateTime UnixTimeToTime(string timeStamp)

{

DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));

long lTime = long.Parse(timeStamp + "0000000");

TimeSpan toNow = new TimeSpan(lTime);

return dtStart.Add(toNow);

}

/// <summary>

/// datetime转换为unixtime

/// </summary>

/// <param name="time"></param>

/// <returns></returns>

private int ConvertDateTimeInt(System.DateTime time)

{

System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));

return (int)(time - startTime).TotalSeconds;

}

/// <summary>

/// 调用百度地图，返回坐标信息

/// </summary>

/// <param name="y">经度</param>

/// <param name="x">纬度</param>

/// <returns></returns>

public string GetMapInfo(string x, string y)

{

try

{

string res = string.Empty;

string parame = string.Empty;

string url = "http://maps.googleapis.com/maps/api/geocode/xml";

parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请

res = webRequestPost(url, parame);

XmlDocument doc = new XmlDocument();

doc.LoadXml(res);

XmlElement rootElement = doc.DocumentElement;

string Status = rootElement.SelectSingleNode("status").InnerText;

if (Status == "OK")

{

//仅获取城市

XmlNodeList xmlResults = rootElement.SelectSingleNode("/GeocodeResponse").ChildNodes;

for (int i = 0; i < xmlResults.Count; i++)

{

XmlNode childNode = xmlResults[i];

if (childNode.Name == "status")

{

continue;

}

string city = "0";

for (int w = 0; w < childNode.ChildNodes.Count; w++)

{

for (int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++)

{

XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];

if (childeTwo.Name == "long_name")

{

city = childeTwo.InnerText;

}

else if (childeTwo.InnerText == "locality")

{

return city;

}

return city;

}

catch (Exception ex)

{

//WriteTxt("map异常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString());

return "0";

}

return "0";

}

/// <summary>

/// Post 提交调用抓取

/// </summary>

/// <param name="url">提交地址</param>

/// <param name="param">参数</param>

/// <returns>string</returns>

public string webRequestPost(string url, string param)

{

byte[] bs = System.Text.Encoding.UTF8.GetBytes(param);

HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url + "?" + param);

req.Method = "Post";

req.Timeout = 120 * 1000;

req.ContentType = "application/x-www-form-urlencoded;";

req.ContentLength = bs.Length;

using (Stream reqStream = req.GetRequestStream())

{

reqStream.Write(bs, 0, bs.Length);

reqStream.Flush();

}

using (WebResponse wr = req.GetResponse())

{

//在这里对接收到的页面内容进行处理

Stream strm = wr.GetResponseStream();

StreamReader sr = new StreamReader(strm, System.Text.Encoding.UTF8);

string line;

System.Text.StringBuilder sb = new System.Text.StringBuilder();

while ((line = sr.ReadLine()) != null)

{

sb.Append(line + System.Environment.NewLine);

}

sr.Close();

strm.Close();

return sb.ToString();

}

private void WriteToDB(RequestXML requestXML,string _xml,int _pid)

{

wx_tmsg wx = new wx_tmsg();

wx.AddNew();

wx.FromUserName = requestXML.FromUserName;

wx.ToUserName = requestXML.ToUserName;

wx.MsgType = requestXML.MsgType;

wx.Msg = requestXML.Content;

wx.Creatime = requestXML.CreateTime;

wx.Location_X = requestXML.Location_X;

wx.Location_Y = requestXML.Location_Y;

wx.Label = requestXML.Label;

wx.Scale = requestXML.Scale;

wx.PicUrl = requestXML.PicUrl;

wx.reply = _xml;

wx.pid = _pid;

try

{

wx.Update();

}

catch (Exception ex)

{

wx_logs.MyInsert(ex.Message);

//ex.message;

}

//微信请求类

public class RequestXML

{

private string toUserName="";

/// <summary>

/// 消息接收方微信号，一般为公众平台账号微信号

/// </summary>

public string ToUserName

{

get { return toUserName; }

set { toUserName = value; }

}

private string fromUserName = "";

/// <summary>

/// 消息发送方微信号

/// </summary>

public string FromUserName

{

get { return fromUserName; }

set { fromUserName = value; }

}

private string createTime = "";

/// <summary>

/// 创建时间

/// </summary>

public string CreateTime

{

get { return createTime; }

set { createTime = value; }

}

private string msgType = "";

/// <summary>

/// 信息类型地理位置:location,文本消息:text,消息类型:image

/// </summary>

public string MsgType

{

get { return msgType; }

set { msgType = value; }

}

private string content = "";

/// <summary>

/// 信息内容

/// </summary>

public string Content

{

get { return content; }

set { content = value; }

}

private string location_X = "";

/// <summary>

/// 地理位置纬度

/// </summary>

public string Location_X

{

get { return location_X; }

set { location_X = value; }

}

private string location_Y = "";

/// <summary>

/// 地理位置经度

/// </summary>

public string Location_Y

{

get { return location_Y; }

set { location_Y = value; }

}

private string scale = "";

/// <summary>

/// 地图缩放大小

/// </summary>

public string Scale

{

get { return scale; }

set { scale = value; }

}

private string label = "";

/// <summary>

/// 地理位置信息

/// </summary>

public string Label

{

get { return label; }

set { label = value; }

}

private string picUrl = "";

/// <summary>

/// 图片链接，开发者可以用HTTP GET获取

/// </summary>

public string PicUrl

{

get { return picUrl; }

set { picUrl = value; }

}

说明：其中用到的mijiya类，主要是调用数据库进行关键词匹配自动回复内容，可以根据自己的业务情况编写。

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