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copied!<p>Look at the <a href="http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k%28SYSTEM.NET.HTTPWEBREQUEST%29;k%28TargetFrameworkMoniker-%22SILVERLIGHT,VERSION=V4.0%22%29;k%28DevLang-CSHARP%29&rd=true" rel="nofollow noreferrer">HttpWebRequest</a> object.</p> <pre><code>public void DoWork() { var url = "http://posttestserver.com/post.php"; // Create the web request object HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url); webRequest.Method = "POST"; webRequest.ContentType = "application/x-www-form-urlencoded"; // Start the request webRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), webRequest); } void GetRequestStreamCallback(IAsyncResult asynchronousResult) { HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState; // End the stream request operation Stream postStream = webRequest.EndGetRequestStream(asynchronousResult); // Create the post data // Demo POST data string postData = "Username=MyUserName&password=MyPassword"; byte[] byteArray = Encoding.UTF8.GetBytes(postData); // Add the post data to the web request postStream.Write(byteArray, 0, byteArray.Length); postStream.Close(); // Start the web request webRequest.BeginGetResponse(new AsyncCallback(GetResponseCallback), webRequest); } void GetResponseCallback(IAsyncResult asynchronousResult) { try { HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState; HttpWebResponse response; // End the get response operation response = (HttpWebResponse)webRequest.EndGetResponse(asynchronousResult); Stream streamResponse = response.GetResponseStream(); StreamReader streamReader = new StreamReader(streamResponse); var Response = streamReader.ReadToEnd(); streamResponse.Close(); streamReader.Close(); response.Close(); } catch (WebException e) { // Error treatment // ... } } private void button1_Click(object sender, RoutedEventArgs e) { DoWork(); } </code></pre> <p>his code adapted slightly from <a href="https://stackoverflow.com/questions/5952094/wp7-windows-phone-7-httpwebrequest-losing-post-data">this question</a></p>

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