C# 向Http服务器送出 POST 请求

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//向Http服务器送出 POST 请求   public string m_PostSubmit(string strUrl,string strParam)  {      string strResult = "error";      try      {          System.Net.HttpWebRequest req = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(strUrl);          Encoding encoding = Encoding.UTF8;          //encoding.GetBytes(postData);          byte[] bs = Encoding.ASCII.GetBytes(strParam);          string responseData = System.String.Empty;          req.Method = "POST";          req.ContentType = "application/x-www-form-urlencoded";          req.ContentLength = bs.Length;          try          {              using (System.IO.Stream reqStream = req.GetRequestStream())              {                  reqStream.Write(bs, 0, bs.Length);                  reqStream.Close();              }              using (System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)req.GetResponse())              {                  using (System.IO.StreamReader reader = new System.IO.StreamReader(response.GetResponseStream(), encoding))                  {                      responseData = reader.ReadToEnd().ToString();                      strResult = responseData;                  }              }          }          catch (System.Exception ex)          {              strResult = "error：" + ex.Message;//返回异常信息          }      }      catch (System.Exception ex)      {          strResult = "error：" + ex.Message;//返回异常信息      }      return strResult;  }<br><br>调用示例：

string strURL = "http://localhost/WinformSubmit.php";

//string param = string.Format("do=login&u={0}&p={1}", username, password); //参数的另一种写法

string strCallerId="1398888888";

string strParam = "callerid=" + strCallerId ;
string strResult = this.m_PostSubmit(strUrl,strParam);

http部分

WinformSubmit.php 页

if($_POST['callerid']=="139"){
　　echo("是");
}
else {
　　echo("否");
}