2.0通信之Socket, 开发一个多人聊天室

介绍
Silverlight 2.0 Socket通信。开发一个多人聊天室
    服务端：实例化Socket, 绑定, 监听, 连接, 接收数据, 发送数据
    客户端：实例化Socket, 指定服务端地址, 连接, 接收数据, 发送数据


在线DEMO
http://www.cnblogs.com/webabcd/archive/2008/10/09/1307486.html


示例
1、Policy服务（向客户端发送策略文件的服务）
clientaccesspolicy.xml

<?xml version="1.0" encoding ="utf-8"?>
<access-policy>
    <cross-domain-access>
        <policy>
            <allow-from>
                <domain uri="*" />
            </allow-from>
            <grant-to>
                <socket-resource port="4502-4534" protocol="tcp" />
            </grant-to>
        </policy>
    </cross-domain-access>
</access-policy>

Main.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Net.Sockets;
using System.IO;
using System.Net;

namespace PolicyServer

2、Socket服务端（聊天室的服务端）
ClientSocketPacket.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SocketServer

Main.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.IO;

namespace SocketServer
}

3、Socket客户端（聊天室的客户端）
SocketClient.xaml

<UserControl x:Class="Silverlight20.Communication.SocketClient"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StackPanel HorizontalAlignment="Left" Width="600" Margin="5" Background="Gray">

        <ScrollViewer x:Name="scrollChat" Height="400" VerticalScrollBarVisibility="Auto" Background="White" Margin="10">
            <TextBlock x:Name="txtChat" TextWrapping="Wrap" />
        </ScrollViewer>

        <StackPanel Orientation="Horizontal" Margin="5">
            <TextBox x:Name="txtName" Margin="5" Width="100" />
            <TextBox x:Name="txtInput" Margin="5" Width="400" KeyDown="txtInput_KeyDown" />
            <Button x:Name="btnSend" Margin="5" Width="60" Content="Send" Click="btnSend_Click"/>
        </StackPanel>

    </StackPanel>
</UserControl>

SocketClient.xaml.cs

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.Net.Sockets;
using System.Text;

namespace Silverlight20.Communication