WebRequest post读取源码

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       static string GetHTML()
        {
            string url = "http://flights.ctrip.com/booking/bjs-sha----adu-1/";

string param = "dayoffset=3&ddate1=2013-01-18&dcityname1=%u5317%u4eac&acityname1=%u4e0a%u6d77";

Uri uri = new Uri(url);

WebRequest myReq = WebRequest.Create(uri);

myReq.Method = "Post";

myReq.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");

byte[] byData = Encoding.Default.GetBytes(param); //获取发送字符串编码后的长度

myReq.ContentLength = byData.Length;

Stream reqStrem = myReq.GetRequestStream(); //返回请求流

reqStrem.Write(byData, 0, byData.Length); //在返回的请求流在写入编码后的长度

reqStrem.Close();

WebResponse result = myReq.GetResponse(); //返回响应

Stream recStream = result.GetResponseStream(); //返回响应流

//如果是Gzip方式则需要解压
recStream = new GZipStream(recStream, CompressionMode.Decompress);

//初始化StreamReader

StreamReader redStream = new StreamReader(recStream, System.Text.Encoding.Default);

string strHTML = redStream.ReadToEnd(); //读取流。转换为字符串

redStream.Close();

recStream.Close();

result.Close();

return strHTML;

}