控制器：下面是post發送消息（微信不支持從前台發送數據，之前試過，報錯，需要跨域，跨域的問題解決后還不行，最后發現之后后端提交
WXApi類：
#region 驗證Token是否過期
/// <summary>
/// 驗證Token是否過期
///</summary>
public static bool TokenExpired(string access_token)
{
string jsonStr = HttpRequestUtil.RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/menu/get?access_token={0}", access_token));
if (Tools.GetJsonValue(jsonStr, "errcode") == "42001")
{
return true;
}
return false;
}
#endregion
#region 獲取Token
/// <summary>
/// 獲取Token
/// </summary>
public static string GetToken(string appid, string secret)
{
string strJson = HttpRequestUtil.RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret));
return Tools.GetJsonValue(strJson, "access_token");
}
#endregion
Tools類：
#region 獲取Json字符串某節點的值
/// <summary>
/// /// 獲取Json字符串某節點的值
/// /// </summary>
public static string GetJsonValue(string jsonStr, string key)
{
string result = string.Empty; if (!string.IsNullOrEmpty(jsonStr))
{
key = "\"" + key.Trim('"') + "\""; int index = jsonStr.IndexOf(key) + key.Length + 1;
if (index > key.Length + 1)
{
//先截逗號，若是最后一個，截“｝”號，取最小值
int end = jsonStr.IndexOf(',', index); if (end == -1)
{
end = jsonStr.IndexOf('}', index);
}
result = jsonStr.Substring(index, end - index);
result = result.Trim(new char[] { '"', ' ', '\'' }); //過濾引號或空格
}
}
return result;
}
#endregion
HttpRequestUtil類：
#region 請求Url，不發送數據
/// <summary>
/// 請求Url，不發送數據
/// </summary>
public static string RequestUrl(string url)
{
return RequestUrl(url, "POST");
}
#endregion
#region 請求Url，不發送數據
/// <summary>
/// 請求Url，不發送數據
/// </summary>
public static string RequestUrl(string url, string method)
{
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = method;
request.ContentType = "text/html";
//request.GetRequestStream()
//request.
request.Headers.Add("charset", "utf-8"); //發送請求並獲取相應回應數據
Stream postStream = request.GetRequestStream();
//postStream.Write(,0,bytearra)
HttpWebResponse response = request.GetResponse() as HttpWebResponse;//直到request.GetResponse()程序才開始向目標網頁發送Post請求
//Stream responseStream =
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);//返回結果網頁（html）代碼
string content = sr.ReadToEnd();
return content;
}
#endregion
下面是會返回錯誤44002的：原因是post數據未發送(沒有提交數據)，也是控制器中：
#region 請求Url，不發送數據
/// <summary>
/// 請求Url，不發送數據
/// </summary>
public static string RequestUrl(string url)
{
return RequestUrl(url, "POST");
}
#endregion
#region 請求Url，不發送數據
/// <summary>
/// 請求Url，不發送數據
/// </summary>
public static string RequestUrl(string url, string method)
{
// 設置參數
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = method;
request.ContentType = "textml";
request.Headers.Add("charset", "utf-8"); //發送請求並獲取相應回應數據
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才開始向目標網頁發送Post請求
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
//返回結果網頁（html）代碼
string content = sr.ReadToEnd();
return content;
}
#endregion
）
#region
public string send(string openida, string senddata)
{
string posturl = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" + WXApi.GetToken(appID, appsecret);//發送地址
string postData = "{\"touser\":\"" + openida + "\",\"msgtype\":\"text\",\"text\":{\"content\":\"" + senddata + "\"}}";//發送消息的字符串 openida為openid,senddata為發送內容
return GetPage(posturl, postData);//以post的形式發送出去
}
#endregion
#region
public string GetPage(string posturl, string postData)///向微信服務器發送post請求（主要是發送消息）
{
Stream outstream = null;
Stream instream = null;
StreamReader sr = null;
HttpWebResponse response = null;
HttpWebRequest request = null;
Encoding encoding = Encoding.UTF8;
byte[] data = encoding.GetBytes(postData);
// 准備請求...
try
{
// 設置參數
request = WebRequest.Create(posturl) as HttpWebRequest;
CookieContainer cookieContainer = new CookieContainer();
request.CookieContainer = cookieContainer;
request.AllowAutoRedirect = true;
request.Method = "POST";//post的形式
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = data.Length;
outstream = request.GetRequestStream();
outstream.Write(data, 0, data.Length);
outstream.Close();
//發送請求並獲取相應回應數據
response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才開始向目標網頁發送Post請求
instream = response.GetResponseStream();
sr = new StreamReader(instream, encoding);
//返回結果網頁（html）代碼
string content = sr.ReadToEnd();
string err = string.Empty;
return content;
}
catch (Exception ex)
{
string err = ex.Message;
//Response.Write(err);
//return string.Empty;
return err;
}
}
#endregion
獲取AppID和：appsecret ，（在控制器上面寫上）
public static readonly string appID = ConfigurationManager.AppSettings["appID"];
public static readonly string appsecret = ConfigurationManager.AppSettings["appsecret"];
web.config中需要寫入下面信息：
<appSettings>
<add key="appID" value="wxf39b0be4b27f0016" />
<add key="appsecret" value="667b57fe3f9126b4c0960b1300c858db" />
</appSettings>
