C#擷取QQ線上狀態代碼

QQ號碼  查詢結果 查詢語句
21117217 GIF89aJ http://wpa.qq.com/pa?p=1:21117217:3
195651222 GIF89aK http://wpa.qq.com/pa?p=1: 252520115:3
426002343 GIF89aJ http://wpa.qq.com/pa?p=1: 4366727:3

///添加相關引用

using System.IO;
using System.Net;
using System.Text;

//按鈕事件

private void button3_Click(object sender, System.EventArgs e)
  {
  
   if(textBox3.Text=="")
   {
    MessageBox.Show("必須填寫當前的查詢的QQ號碼!","錯誤提示!");
    textBox3.Focus();
    return;   
   }
   else
   {
    string strQQ=textBox3.Text.Trim();
    string strSearchQQ="http://wpa.qq.com/pa?p=1:"+strQQ+":3";
    string strQQStatus=GetWebContent(strSearchQQ).Substring(0,7);
    switch(strQQStatus)
    {
     case "GIF89aK":MessageBox.Show(strQQ+"不線上","QQ狀態提示!");
      break;
     case "GIF89aJ":MessageBox.Show(strQQ+"不線上","QQ狀態提示!");
      break;          
    }
   }
  }

//調用函數

//根據Url地址得到網頁的html源碼
  private string GetWebContent(string Url)
  {
   string strResult="";
   try
   {
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
　　　　//聲明一個HttpWebRequest請求
    request.Timeout = 30000;
    //設定連線逾時時間
    request.Headers.Set("Pragma", "no-cache");
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    Stream streamReceive = response.GetResponseStream();
    Encoding encoding = Encoding.GetEncoding("GB2312");
    StreamReader streamReader = new StreamReader(streamReceive, encoding);
    strResult = streamReader.ReadToEnd();
   }
   catch
   {
    MessageBox.Show("出錯");
   }
   return strResult;
  }