Silverlight 2.0 正式版跨域提交数据全攻略
2008-10-27 11:49:10 来源:WEB开发网本例子中使用的 Page.xaml 如下:
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<UserControl xmlns:basics="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
x:Class="SilverlightApplication3.Page"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="300">
<Grid x:Name="LayoutRoot" Background="White">
<Canvas Width="400" Height="300" Canvas.Left="2">
<TextBox x:Name="data" Canvas.Left="2" Canvas.Top="2" Height="30" Width="180" Text="【孟子E章】测试数据" F></TextBox>
<Button C Width="100" Height="30" Click="PostData" Canvas.Top="2" Canvas.Left="200"></Button>
<TextBlock x:Name="result" Canvas.Top="40" F></TextBlock>
</Canvas>
</Grid>
</UserControl>
Page.xaml.cs 完整内容
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
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;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Threading;
namespace SilverlightApplication3
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
//设置当前界面线程
syncContext = SynchronizationContext.Current;
}
private SynchronizationContext syncContext;
private String postData = String.Empty;
private void PostData(object sender, RoutedEventArgs e)
{
//请注意:Silverlight 里的 HttpWebRequest, Encoding 类的属性和方法与常规的 .NET Framework 里面还是不同的。
result.Text = "开始提交数据……";
postData = "data=" + data.Text; //要提交的内容
Uri url = new Uri("http://www.mengxianhui.com/admin?tmp=" + DateTime.Now.Ticks.ToString(), UriKind.Absolute);
System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)WebRequest.Create(url);
request.Method = "POST"; // Silverlight 只支持 GET 和 POST 方法
request.AllowReadStreamBuffering = true;
request.C;
request.BeginGetRequestStream(new AsyncCallback(RequestReady), request);
}
private void RequestReady(IAsyncResult asyncResult)
{
HttpWebRequest request = asyncResult.AsyncState as HttpWebRequest;
StreamWriter postStream = new StreamWriter(request.EndGetRequestStream(asyncResult));
//byte[] byteArray = Encoding.UTF8.GetBytes(postData);
//Encoding.GetEncoding()方法只支持四种编码。utf-8 , utf-16 , utf-16BE , utf-16LE
postStream.Write(postData); //处理中文的问题。不要使用 Stream 的 Write 方法。
postStream.Close();
postStream.Dispose();
request.BeginGetResponse(new AsyncCallback(ResponseReady), request);
}
void ResponseReady(IAsyncResult asyncResult)
{
HttpWebRequest request = asyncResult.AsyncState as HttpWebRequest;
WebResponse response = request.EndGetResponse(asyncResult) as WebResponse;
//同步线程上下文
if (syncContext == null) syncContext = new SynchronizationContext();
syncContext.Post(ExtractResponse, response);
}
private void ExtractResponse(object state)
{
WebResponse response = state as WebResponse;
Stream responseStream = response.GetResponseStream();
StreamReader streamRead = new StreamReader(responseStream);
//显示返回的数据
result.Text = new StreamReader(responseStream).ReadToEnd();
response.Close();
responseStream.Close();
responseStream.Dispose();
streamRead.Close();
streamRead.Dispose();
}
}
}
Tags:Silverlight 提交
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