微信通过openID发送消息/后台post、get提交并接收数据

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") == "")
{
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 + ;
if (index > key.Length + )
{
//先截逗号，若是最后一个，截“｝”号，取最小值
int end = jsonStr.IndexOf(',', index); if (end == -)
{
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