异步向站外URL Post数据,根据返回值再做数据库操作,怎么写?

Question

应该用到哪些类?Socket?给我个大框架吧,不知道从哪写起,怎么站外url post数据,哪些类负责发接,回调什么的,谢谢啦

Answer 1

还有一问题 Dns.BeginResolve 说过时了,这个是怎么回事,有代替的东西么?

Answer 2

你url是一个网站的话。使用：httpResponse就可以。 public static string GetHtml(string url, string postData, Encoding enc)
        {
            string result = "";
            try
            {
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url + "&" + postData);
                req.Method = "GET";
                req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; Maxthon; .NET CLR 1.1.4322; .NET CLR 2.0.50727; Alexa Toolbar)";
                req.ContentType = "application/x-www-form-urlencoded";                HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
                StreamReader sr = new StreamReader(resp.GetResponseStream(), enc);
                result = sr.ReadToEnd();
                sr.Close();
                resp.Close();
            }
            catch (Exception)
            {
                result = "";
            }
            return result;
        }        public static string PostHtml(string url, string postData, Encoding enc)
        {
            string result = "";
            try
            {
                HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url + "&" + postData);
                req.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; Maxthon; .NET CLR 1.1.4322; .NET CLR 2.0.50727; Alexa Toolbar)";
                req.ContentType = "application/x-www-form-urlencoded";
                HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
                StreamReader sr = new StreamReader(resp.GetResponseStream(), enc);
                result = sr.ReadToEnd();
                sr.Close();
                resp.Close();
            }
            catch (Exception)
            {
                result = "";
            }
            return result;
        }
//调用
StrData = PubVar.PostHtml(StrData, StrPost, Encoding.Default);            if (StrData == "") return CreateXmlDocument("Query Error");

Answer 3

Thread threadpostdata = new Thread(PostData);
threadpostdata.Start();
void PostData()
{}

Answer 4

我后来这样写了，不知道对不对private static ManualResetEvent allDone = new ManualResetEvent(false);        public static void SendPredict(string content)
        {
            System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(Predict), content);
        }        private static void Predict(object content)
        {
            byte[] data = Encoding.UTF8.GetBytes(PostParam(content.ToString()));            HttpWebRequest request = WebRequest.Create("http://guba.hexun.com/CallBack.aspx") as HttpWebRequest;
            request.ContentType = "application/x-www-form-urlencoded";
            request.Method = "POST";
            request.Timeout = 100000;
            request.ContentLength = data.Length;
                        Stream stream = request.GetRequestStream();
            stream.Write(data, 0, data.Length);
            stream.Close();
            request.BeginGetResponse(new AsyncCallback(PredictCallback), request);            allDone.WaitOne();
        }        private static void PredictCallback(IAsyncResult asynchronousResult)
        {
            try
            {
                HttpWebRequest request = asynchronousResult.AsyncState as HttpWebRequest;                HttpWebResponse response = request.EndGetResponse(asynchronousResult) as HttpWebResponse;
                Stream streamResponse = response.GetResponseStream();
                StreamReader streamRead = new StreamReader(streamResponse, Encoding.Default);
                string content = streamRead.ReadToEnd();                streamResponse.Close();
                streamRead.Close();
                response.Close();
                allDone.Set();
            }
            catch (Exception e)
            {
                string error = e.ToString();                
            }
        }