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Categories / Silverlight / Communication

 

Using the HttpWebRequest and HttpWebResponse Objects

<UserControl x:Class='SilverlightApplication3.MainPage'     xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'      xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'     xmlns:d='http://schemas.microsoft.com/expression/blend/2008'      xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'      mc:Ignorable='d'      d:DesignWidth='640'      d:DesignHeight='480'>        <Grid x:Name="LayoutRoot" Background="LightBlue">               <TextBlock Text="To:"/>        <TextBox x:Name="To" />        <TextBlock Text="From:"/>        <TextBox x:Name="From"/>        <TextBlock Text="Subject:"/>        <TextBox x:Name="Subject"/>        <TextBlock Text="Message:"/>        <TextBox x:Name="Body" AcceptsReturn="True" />        <Button x:Name="SendBtn" Content="Send"/>        <TextBlock x:Name="StatusText"/>     </Grid> </UserControl> //File:Page.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Net; using System.IO; namespace SilverlightApplication3 {     public partial class MainPage : UserControl     {         public MainPage()          {             InitializeComponent();             SendBtn.Click += new RoutedEventHandler(DoRequest);          }         void DoRequest(object sender, RoutedEventArgs e)          {             string serviceUrl = "http://myserver.com/mailservice.php";             HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(serviceUrl));             request.Method = "POST";             request.ContentType = "application/x-form-urlencoded";             request.BeginGetRequestStream(new AsyncCallback(requestHandler),request);          }          void requestHandler(IAsyncResult asyncResult){             string postData = String.Format("ToAddr={0}&FromAddr={1}&Subject={2}&Body={3}",To.Text, From.Text, Subject.Text, Body.Text);              HttpWebRequest request = (HttpWebRequest)asyncResult.AsyncState;              Stream requestStream = request.EndGetRequestStream(asyncResult);             StreamWriter writer = new StreamWriter(requestStream);             writer.Write(postData);             writer.Flush();             writer.Close();             request.BeginGetResponse(new AsyncCallback(responseHandler),request);          }            void responseHandler(IAsyncResult asyncResult){             HttpWebRequest request = (HttpWebRequest)asyncResult.AsyncState;             HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asyncResult);             if (request.HaveResponse && response.StatusCode == HttpStatusCode.OK){                 StreamReader reader = new StreamReader(response.GetResponseStream());                 StatusText.Text = reader.ReadToEnd();                 reader.Close();             }else{                 StatusText.Text = "No Response From Mail Server";             }             LayoutRoot.Children.Remove(SendBtn);          }     } }