Mộột sộố thao tác vớối HttpWebRequest Lấốy nộội dung trang web (1) using System; using System.IO; using System.Net; using System.Text; class WebFetch { static void Main(string[] args) { // used to build entire input StringBuilder sb = new StringBuilder();  // used on each read operation byte[] buf = new byte[8192]; Lấốy nộội dung trang web (2) // prepare the web page we will be asking for HttpWebRequest request = (HttpWebRequest) WebRequest.Create("http://www.mayosoftware.com");  // execute the request HttpWebResponse response = (HttpWebResponse) // we will read data via the response stream Stream resStream = response.GetResponseStream();  request.GetResponse();  Lấốy nộội dung trang web (3) string tempString = null; int count = 0;  { // fill the buffer with data count = resStream.Read(buf, 0, buf.Length);  if (count != 0) {// translate from bytes to ASCII text Encoding.ASCII.GetString(buf, 0, count);  // continue building the string sb.Append(tempString); } } while (count > 0); // any more data to read? // make sure we read some data tempString = Lấốy nộội dung trang web (4) // print out page source } } Console.WriteLine(sb.ToString()); Giaả lấộp sựộ kiệộn vớối form (1) Giaả lấộp sựộ kiệộn vớối form (2) private void OnPostInfoClick(object sender, System.EventArgs e) { string strId = UserId_TextBox.Text; string strName = Name_TextBox.Text; ASCIIEncoding encoding=new ASCIIEncoding(); string postData="userid="+strId; postData += ("&username="+strName); byte[] data = encoding.GetBytes(postData); Giaả lấộp sựộ kiệộn vớối form (3) // Prepare web request HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("http://localhost/MyIdentity/Default.aspx"); myRequest.Method = "POST"; myRequest.ContentType="application/x-www-form-urlencoded"; myRequest.ContentLength = data.Length; Stream newStream=myRequest.GetRequestStream(); // Send the data newStream.Write(data,0,data.Length); newStream.Close(); } Xác điộn h giá triộ Accept-Encoding header obRequest.Headers.Add("Accept-Encoding", "gzip"); String strEncoding = obResponse.ContentEncoding; if (String.Compare("gzip", strEncoding, true) == 0) { // Unzip the response stream } Simple retrieval of Web data over HTTP string lcUrl = " http://www.west-wind.com/TestPage.wwd "; // *** Establish the request HttpWebRequest loHttp = (HttpWebRequest) WebRequest.Create(lcUrl); // *** Set properties loHttp.Timeout = 10000; // 10 secs loHttp.UserAgent = "Code Sample Web Client"; // *** Retrieve request info headers HttpWebResponse loWebResponse = (HttpWebResponse) loHttp.GetResponse(); Encoding enc = Encoding.GetEncoding(1252); // Windows default Code Page StreamReader loResponseStream = new StreamReader(loWebResponse.GetResponseStream(),enc); string lcHtml = loResponseStream.ReadToEnd(); loWebResponse.Close(); loResponseStream.Close(); POSTing data to the Web Server (1) string lcUrl = "http://www.west-wind.com/testpage.wwd"; HttpWebRequest loHttp = (HttpWebRequest) WebRequest.Create(lcUrl);   // *** Send any POST data string lcPostData = "Name= " + HttpUtility.UrlEncode("Rick Strahl") + "&Company=" + HttpUtility.UrlEncode("West Wind ");   POSTing data to the Web Server (2) loHttp.Method= "POST"; byte [] lbPostBuffer = System.Text Encoding.GetEncoding(1252).GetBytes(lcPostData); loHttp.ContentLength = lbPostBuffer.Length;   Stream loPostData = loHttp.GetRequestStream(); loPostData.Write(lbPostBuffer,0,lbPostBuffer.Length); loPostData.Close(); POSTing data to the Web Server (3) HttpWebResponse loWebResponse = (HttpWebResponse) loHttp.GetResponse();   Encoding enc = System.Text.Encoding.GetEncoding(1252);   StreamReader loResponseStream = new StreamReader(loWebResponse.GetResponseStream(),enc);   string lcHtml = loResponseStream.ReadToEnd();   loWebResponse.Close(); loResponseStream.Close(); Authentication  WebRequest.Credentials = new NetworkCredential("username","password");  WebRequest.Credentials = CredentialCache.DefaultCredentials Proxy Server Configuration // pass Proxy string and bypass local machine WebProxy loProxy = new WebProxy("http://proxy-server.mine.com:8080",true);   // ** ByPassList string[] cByPass = new string[2]; cByPass[1] = "http://someserver.net"; cByPass[2] = http://192.0.0.1   loProxy.BypassList = cByPass;   // ** Proxy Authentication loProxy.Credentials = new NetworkCredential("proxyusername","pass");   Request.Proxy = loProxy; Proxy Server Configuration Request.Proxy = new WebProxy( "http://proxy-server.mine.com:8080",true,cBypass,new NetworkCredential(…) ); [...]...POSTing data to the Web Server (1) string lcUrl = "http://www.west-wind.com/testpage.wwd"; HttpWebRequest loHttp = (HttpWebRequest) WebRequest.Create(lcUrl);   // *** Send any POST data string lcPostData = "Name= " + HttpUtility.UrlEncode("Rick Strahl") + "&Company=" + HttpUtility.UrlEncode("West Wind ");