Silverlight GET ,POST

1.Get请求

cs:

  private  void Download()
        {
             string url =  " http://localhost:13936/GetData.aspx?id=getwangk ";
            WebClient client =  new WebClient();
            client.DownloadStringCompleted +=  new DownloadStringCompletedEventHandler(DownloadBind);
            client.DownloadStringAsync( new Uri(url));
        }

         private  void DownloadBind( object sender, DownloadStringCompletedEventArgs e)
        {
             if (e.Error ==  null)
            {
                tb.Text = e.Result;
            }
             else
            {
                tb.Text =  " 错误信息 " + e.Error.Message;
            }
        }

2.Post 请求

xaml:

 

< UserControl  x:Class ="RhythmkSilverlightApp.Primary.SimplifyPost"
    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:DesignHeight ="300"  d:DesignWidth ="400" >

     < StackPanel  x:Name ="LayoutRoot"  Background ="White" >
         < Button  x:Name ="btn"  Width ="100"  Height ="30"  Margin ="50"  Content ="Post"  Click ="btn_Click" ></ Button >
     </ StackPanel >
</ UserControl >

cs:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
//  by  rhythmk
namespace RhythmkSilverlightApp.Primary
{
     public  partial  class SimplifyPost : UserControl
    {
         private SynchronizationContext currentContext;

         public SimplifyPost()
        {
            InitializeComponent();
             this.currentContext = SynchronizationContext.Current;
        }

         private  void btn_Click( object sender, RoutedEventArgs e)
        {
            HttpClientPost post =  new HttpClientPost();
            post.PostData( " http://localhost:13936/GetData.aspx ",  " id=cnblogs.com/rhythmk ", currentContext,  new SendOrPostCallback(ShowResult));
        }

         public  void ShowResult( object obj)
        {
            MessageBox.Show( " 回传数据： " + obj.ToString());
        }
    }

     public  class HttpClientPost
    {
         private  string postData;
        SynchronizationContext currentContext;

        SendOrPostCallback sopc;

         public  void PostData( string url,  string data, SynchronizationContext _currentContext, SendOrPostCallback _sopc)
        {
            currentContext = _currentContext;
            Uri endpoint =  new Uri(url);
            sopc = _sopc;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(endpoint);
            request.Method =  " POST ";
            request.ContentType =  " application/x-www-form-urlencoded ";
            postData = data;
            request.BeginGetRequestStream( new AsyncCallback(RequestReadySocket), request);
        }

         private  void RequestReadySocket(IAsyncResult asyncResult)
        {
            WebRequest request = asyncResult.AsyncState  as WebRequest;
            Stream requestStream = request.EndGetRequestStream(asyncResult);

             using (StreamWriter writer =  new StreamWriter(requestStream))
            {
                writer.Write(postData);
                writer.Flush();
            }

            request.BeginGetResponse( new AsyncCallback(ResponseReadySocket), request);
        }

         private  void ResponseReadySocket(IAsyncResult asyncResult)
        {
            WebRequest request = asyncResult.AsyncState  as WebRequest;
            WebResponse response = request.EndGetResponse(asyncResult);
             using (Stream responseStream = response.GetResponseStream())
            {
                StreamReader reader =  new StreamReader(responseStream);
                 string paramStr = reader.ReadToEnd();
                currentContext.Post(sopc, paramStr);
            }
        }
    }
}