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說起微信公眾帳號，大家都不會陌生，使用這個平臺能給網站或系統增加一個新亮點，直接進入正題吧，在使用之前一定要仔細閱讀官方API文檔。
使用.net實現的方法：
//微信接口地址頁面代碼:

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)) //請求處理 
{ 
_wx.Handle(postStr); 
} 
} 
else 
{ 
_wx.Auth(); 
}

具體處理類

/// summary> 
/// 微信公眾平臺操作類 
/// /summary> 
public class weixin 
{ 
private string Token = "my_weixin_token"; //換成自己的token 
public void Auth() 
{ 
string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"]; 
if (CheckSignature()) //校驗簽名是否正確 
{ 
if (!string.IsNullOrEmpty(echoStr)) 
{ 
System.Web.HttpContext.Current.Response.Write(echoStr); //返回原值表示校驗成功 
System.Web.HttpContext.Current.Response.End(); 
} 
} 
} 
 
 
public void Handle(string postStr) 
{ 
//封裝請求類 
XmlDocument doc = new XmlDocument(); 
doc.LoadXml(postStr); 
XmlElement rootElement = doc.DocumentElement; 
//MsgType 
XmlNode MsgType = rootElement.SelectSingleNode("MsgType"); 
//接收的值--->接收消息類(也稱為消息推送) 
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; 
 
//根據不同的類型進行不同的處理 
switch (requestXML.MsgType) 
{ 
case "text": //文本消息 
requestXML.Content = rootElement.SelectSingleNode("Content").InnerText; 
break; 
case "image": //圖片 
requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText; 
break; 
case "location": //位置 
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; 
break; 
case "link": //鏈接 
break; 
case "event": //事件推送 支持V4.5+ 
break; 
} 
 
//消息回復 
ResponseMsg(requestXML); 
} 
 
 
/// summary> 
/// 驗證微信簽名 
/// * 將token、timestamp、nonce三個參數進行字典序排序 
/// * 將三個參數字符串拼接成一個字符串進行sha1加密 
/// * 開發者獲得加密后的字符串可與signature對比，標識該請求來源于微信。 
/// /summary> 
/// 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"]; 
//加密/校驗流程： 
//1. 將token、timestamp、nonce三個參數進行字典序排序 
string[] ArrTmp = { Token, timestamp, nonce }; 
Array.Sort(ArrTmp);//字典排序 
//2.將三個參數字符串拼接成一個字符串進行sha1加密 
string tmpStr = string.Join("", ArrTmp); 
tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1"); 
tmpStr = tmpStr.ToLower(); 
//3.開發者獲得加密后的字符串可與signature對比，標識該請求來源于微信。 
if (tmpStr == signature) 
{ 
return true; 
} 
else 
{ 
return false; 
} 
} 
 
/// summary> 
/// 消息回復(微信信息返回) 
/// /summary> 
/// param name="requestXML">The request XML./param> 
private void ResponseMsg(RequestXML requestXML) 
{ 
try 
{ 
string resxml = ""; 
//主要是調用數據庫進行關鍵詞匹配自動回復內容，可以根據自己的業務情況編寫。 
//1.通常有，沒有匹配任何指令時，返回幫助信息 
AutoResponse mi = new AutoResponse(requestXML.Content, requestXML.FromUserName); 
 
switch (requestXML.MsgType) 
{ 
case "text": 
//在這里執行一系列操作，從而實現自動回復內容. 
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>"; 
} 
break; 
case "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，我們知道您的位置啦。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，我們知道您的位置啦。您可以:" + mi.GetDefault() + "]]>/Content>FuncFlag>1/FuncFlag>/xml>"; 
} 
break; 
case "image": 
//圖文混合的消息 具體格式請見官方API“回復圖文消息” 
break; 
} 
 
System.Web.HttpContext.Current.Response.Write(resxml); 
WriteToDB(requestXML, resxml, mi.pid); 
} 
catch (Exception ex) 
{ 
//WriteTxt("異常：" + ex.Message + "Struck:" + ex.StackTrace.ToString()); 
//wx_logs.MyInsert("異常：" + ex.Message + "Struck:" + ex.StackTrace.ToString()); 
} 
} 
 
 
/// summary> 
/// unix時間轉換為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轉換為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> 
/// 調用百度地圖，返回坐標信息 
/// /summary> 
/// param name="y">經度/param> 
/// param name="x">緯度/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-CNsensor=false";//此key為個人申請 
res = webRequestPost(url, parame); 
 
XmlDocument doc = new XmlDocument(); 
doc.LoadXml(res); 
 
XmlElement rootElement = doc.DocumentElement; 
string Status = rootElement.SelectSingleNode("status").InnerText; 
 
if (Status == "OK") 
{ 
//僅獲取城市 
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異常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString()); 
return "0"; 
} 
return "0"; 
} 
 
 
/// summary> 
/// Post 提交調用抓取 
/// /summary> 
/// param name="url">提交地址/param> 
/// param name="param">參數/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()) 
{ 
//在這里對接收到的頁面內容進行處理 
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(); 
} 
} 
 
/// summary> 
/// 將本次交互信息保存至數據庫中 
/// /summary> 
/// param name="requestXML">/param> 
/// param name="_xml">/param> 
/// param name="_pid">/param> 
private void WriteToDB(RequestXML requestXML, string _xml, int _pid) 
{ 
WeiXinMsg wx = new WeiXinMsg(); 
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.Add(); 
} 
catch (Exception ex) 
{ 
//wx_logs.MyInsert(ex.Message); 
//ex.message; 
} 
} 
}

響應類MODEL

 
#region 微信請求類 RequestXML 
/// summary> 
/// 微信請求類 
/// /summary> 
public class RequestXML 
{ 
private string toUserName = ""; 
/// summary> 
/// 消息接收方微信號，一般為公眾平臺賬號微信號 
/// /summary> 
public string ToUserName 
{ 
get { return toUserName; } 
set { toUserName = value; } 
} 
 
private string fromUserName = ""; 
/// summary> 
/// 消息發送方微信號 
/// /summary> 
public string FromUserName 
{ 
get { return fromUserName; } 
set { fromUserName = value; } 
} 
 
private string createTime = ""; 
/// summary> 
/// 創建時間 
/// /summary> 
public string CreateTime 
{ 
get { return createTime; } 
set { createTime = value; } 
} 
 
private string msgType = ""; 
/// summary> 
/// 信息類型 地理位置:location,文本消息:text,消息類型:image 
/// /summary> 
public string MsgType 
{ 
get { return msgType; } 
set { msgType = value; } 
} 
 
private string content = ""; 
/// summary> 
/// 信息內容 
/// /summary> 
public string Content 
{ 
get { return content; } 
set { content = value; } 
} 
 
private string location_X = ""; 
/// summary> 
/// 地理位置緯度 
/// /summary> 
public string Location_X 
{ 
get { return location_X; } 
set { location_X = value; } 
} 
 
private string location_Y = ""; 
/// summary> 
/// 地理位置經度 
/// /summary> 
public string Location_Y 
{ 
get { return location_Y; } 
set { location_Y = value; } 
} 
 
private string scale = ""; 
/// summary> 
/// 地圖縮放大小 
/// /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> 
/// 圖片鏈接，開發者可以用HTTP GET獲取 
/// /summary> 
public string PicUrl 
{ 
get { return picUrl; } 
set { picUrl = value; } 
} 
} 
#endregion

本文已被整理到了《ASP.NET微信開發教程匯總》，歡迎大家學習閱讀。

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asp.net實現微信公眾賬號接口開發教程