控制器：下面是post发送消息（微信不支持从前台发送数据，之前试过，报错，需要跨域，跨域的问题解决后还不行，最后发现之后后端提交
WXApi类：
#region 验证Token是否过期
/// <summary>
/// 验证Token是否过期
///</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 获取Token
/// <summary>
/// 获取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类：
#region 获取Json字符串某节点的值
/// <summary>
/// /// 获取Json字符串某节点的值
/// /// </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)
{
//先截逗号，若是最后一个，截“｝”号，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[] { ‘"‘, ‘ ‘, ‘\‘‘ }); //过滤引号或空格
}
}
return result;
}
#endregion
HttpRequestUtil类：
#region 请求Url，不发送数据
/// <summary>
/// 请求Url，不发送数据
/// </summary>
public static string RequestUrl(string url)
{
return RequestUrl(url, "POST");
}
#endregion
#region 请求Url，不发送数据
/// <summary>
/// 请求Url，不发送数据
/// </summary>
public static string RequestUrl(string url, string method)
{
// 设置参数
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"); //发送请求并获取相应回应数据
Stream postStream = request.GetRequestStream();
//postStream.Write(,0,bytearra)
HttpWebResponse response = request.GetResponse() as HttpWebResponse;//直到request.GetResponse()程序才开始向目标网页发送Post请求
//Stream responseStream =
StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);//返回结果网页（html）代码
string content = sr.ReadToEnd();
return content;
}
#endregion
下面是会返回错误44002的：原因是post数据未发送(没有提交数据)，也是控制器中：
#region 请求Url，不发送数据
/// <summary>
/// 请求Url，不发送数据
/// </summary>
public static string RequestUrl(string url)
{
return RequestUrl(url, "POST");
}
#endregion
#region 请求Url，不发送数据
/// <summary>
/// 请求Url，不发送数据
/// </summary>
public static string RequestUrl(string url, string method)
{
// 设置参数
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"); //发送请求并获取相应回应数据
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
//返回结果网页（html）代码
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);//发送地址
string postData = "{\"touser\":\"" + openida + "\",\"msgtype\":\"text\",\"text\":{\"content\":\"" + senddata + "\"}}";//发送消息的字符串 openida为openid,senddata为发送内容
return GetPage(posturl, postData);//以post的形式发送出去
}
#endregion
#region
public string GetPage(string posturl, string postData)///向微信服务器发送post请求（主要是发送消息）
{
Stream outstream = null;
Stream instream = null;
StreamReader sr = null;
HttpWebResponse response = null;
HttpWebRequest request = null;
Encoding encoding = Encoding.UTF8;
byte[] data = encoding.GetBytes(postData);
// 准备请求...
try
{
// 设置参数
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();
//发送请求并获取相应回应数据
response = request.GetResponse() as HttpWebResponse;
//直到request.GetResponse()程序才开始向目标网页发送Post请求
instream = response.GetResponseStream();
sr = new StreamReader(instream, encoding);
//返回结果网页（html）代码
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
