public void Post(string url)
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.KeepAlive = true;
req.Timeout = 300000;
req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
postData = Encoding.UTF8.GetBytes(PostData(param));
req.BeginGetRequestStream(new AsyncCallback(RequestStreamCallBack), req);
}
public static void RequestStreamCallBack(IAsyncResult result)
{
HttpWebRequest request = (HttpWebRequest)result.AsyncState;
Stream reqStream = request.EndGetRequestStream(result);
reqStream.Write(postData, 0, postData.Length);
reqStream.Close();
//如何让程序在此处步不回到界面，调用完下面的对流的读取后，在返回界面？谢谢高手指点！
request.BeginGetResponse(new AsyncCallback(ResponseCallBack), request);
}
public static void ResponseCallBack(IAsyncResult result)
{
HttpWebRequest req = (HttpWebRequest)result.AsyncState;
HttpWebResponse response = (HttpWebResponse)req.EndGetResponse(result);
using (Stream sw = response.GetResponseStream())
{
using (StreamReader reader = new StreamReader(sw))
{
xmls = reader.ReadToEnd();
}
}
if (response != null) response.Close();
}