Silverlight Socket異步通信 範例 Demo

 

最近剛接觸Silverlight，研究了一下Silverlight的Socket通信，把代碼貼出來與大家分享下。

以下在Vs2010 、Silverlight4.0下測試通過。

首先要建立一個PolicyFile.xml文件，該文件留指定一個策略文件，至於策略文件的格式，MS的Silverlight有詳細說明和配置方法

 

<?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>

 

 

接下來寫Client端 xaml

 

<Grid x:Name="LayoutRoot" Background="White" ShowGridLines="True"> <Grid.RowDefinitions > <RowDefinition /> <RowDefinition /> </Grid.RowDefinitions> <TextBox x:Name="txtToSend" Grid.Row="0"/> <Button Grid.Row="1" Click="OnSend" Content="Send" Margin="20" /> </Grid>

 

 

 

Client端CS代碼：

 

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.Threading; using System.Text; namespace SocketTest { public partial class MainPage : UserControl { //SilverlightSocket通信是基於異步的Socket通信，爲了保持有一個Socket一直處於Receive狀態，所以設置兩個Socket進行通信 private SynchronizationContext syn;//同步上下文 private System.Net.Sockets.Socket sendSocket;//用於發送信息的Socket private SocketAsyncEventArgs sendSocketArgs;//發送信息的Socket參數 private System.Net.Sockets.Socket receiveSocket;//用於接收信息的Socket private SocketAsyncEventArgs receiveSocketArgs;//用於接收信息的Socket參數 private string remoteIPAddress;//遠程連接的IP地址 public MainPage() { //初始化 InitializeComponent(); syn = SynchronizationContext.Current; sendSocket=new System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); receiveSocket=new System.Net.Sockets.Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); sendSocketArgs = new SocketAsyncEventArgs(); receiveSocketArgs = new SocketAsyncEventArgs(); remoteIPAddress = "10.6.1.69"; SocketPrepare(sendSocket,sendSocketArgs); SocketPrepare(receiveSocket,receiveSocketArgs); } protected void SocketPrepare(Socket _socket,SocketAsyncEventArgs _socketArgs) { byte[] bytes = Encoding.UTF8.GetBytes("Prepare"); _socketArgs.UserToken = bytes; //Silverlight通信端口有嚴格的規定，具體查看文檔 _socketArgs.RemoteEndPoint = new DnsEndPoint(remoteIPAddress, 4502); _socketArgs.Completed += new EventHandler<SocketAsyncEventArgs>(socketArgs_Completed); _socket.ConnectAsync(_socketArgs); //socket通信步驟：Contect->Send->Receive } void OnSend(object sender, EventArgs args) { sendSocketArgs.UserToken = Encoding.UTF8.GetBytes(txtToSend.Text); ProcessConnect_Send(sendSocket, sendSocketArgs); } void socketArgs_Completed(object sender, SocketAsyncEventArgs e) { Socket s = sender as Socket; switch (e.LastOperation) { case SocketAsyncOperation.Connect: ProcessConnect_Send(s, e); break; case SocketAsyncOperation.Receive: ProcessReceive_Post(s, e); break; case SocketAsyncOperation.Send: ProcessSend_Receive(s, e); break; } } void ProcessConnect_Send(Socket tmpSocket,SocketAsyncEventArgs e) { //從UserToken獲得要發送的內容 byte[] bytes = (byte[])e.UserToken; e.SetBuffer(bytes, 0, bytes.Length); tmpSocket.SendAsync(e); } void ProcessSend_Receive(Socket tmpSocket, SocketAsyncEventArgs e) { byte[] bytes = new byte[30]; e.SetBuffer(bytes, 0, bytes.Length); tmpSocket.ReceiveAsync(e); } void ProcessReceive_Post(Socket tmpSocket, SocketAsyncEventArgs e) { syn.Post(GetText, Encoding.UTF8.GetString(e.Buffer, 0, e.Buffer.Length) + " and Received"); //爲了保證有一個Socket一直處在Receive狀態，所以在接收到第一次數據之後，繼續進入Receive狀態 if (tmpSocket == receiveSocket) tmpSocket.ReceiveAsync(e); } void GetText(object str) { txtToSend.Text += "/r/n" + str.ToString(); } } }

 

 

我們用一個控制檯項目來作爲Socket的Server端，用於接收Sliverlight程序發過來的信息以及向SilverlightClient端發送信息。

代碼如下：

ServerMonitor.cs

 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Net.Sockets; using System.Net; using System.IO; using System.Threading; using System.Collections; namespace SocketTestServer { public class ServerMonitor { public static List<Socket> socketList = new List<Socket>(); public ServerMonitor() { Console.WriteLine("=====Socket監聽服務開啓====="); } //監聽策略請求和發送策略請求方法 public void PolicyThread() { //創建一個Socket用來監聽943（固定的）端口的策略請求 Socket policy = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); policy.Bind(new IPEndPoint(IPAddress.Any, 943)); policy.Listen(10); while (true) { Socket _policy = policy.Accept(); string policyRequestString = "<policy-file-request/>";//固定 byte[] b = new byte[policyRequestString.Length]; _policy.Receive(b); string requeststring = System.Text.Encoding.UTF8.GetString(b, 0, b.Length); Console.WriteLine(requeststring); if (requeststring == policyRequestString) { SendPolicy(_policy); Console.WriteLine("Policy File have sended"); _policy.Close(); } else { Console.WriteLine("not a sure request string!"); } } } //監聽信息請求和發送信息方法 public void InfoThread() { //創建一個Socket用於監聽4502端口，獲取接收客戶端發送過來的信息 Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); socket.Bind(new IPEndPoint(IPAddress.Any, 4502)); socket.Listen(4); while (true) { Socket _socket = socket.Accept(); IPEndPoint endPoint = _socket.RemoteEndPoint as IPEndPoint; string ipAddress = endPoint.Address.ToString(); socketList.Add(_socket); ThreadStart work = new ThreadStart(new ThreadWork(_socket).DoWork); Thread threadWork = new Thread(work); threadWork.Name = ipAddress; threadWork.Start(); } } //發送策略文件的方法，參數是傳遞進來的Socket連接 public void SendPolicy(Socket socket) { //創建一個文件流，該文件留指定代開一個策略文件，至於策略文件的格式，MS的Silverlight有詳細說明和配置方法 FileStream fs = new FileStream(@"D:/PolicyFile.xml", FileMode.Open); int length = (int)fs.Length; byte[] bytes = new byte[length]; fs.Read(bytes, 0, length); fs.Close(); socket.Send(bytes, length, SocketFlags.None); } protected class ThreadWork { private Socket socket; public ThreadWork(Socket socket) { this.socket = socket; } public void DoWork() { IPEndPoint endPoint = socket.RemoteEndPoint as IPEndPoint; string ipAddress = endPoint.Address.ToString(); while(true) { try { byte[] b2 = new byte[1024]; int count = socket.Receive(b2); Console.WriteLine(Encoding.UTF8.GetString(b2, 0, count)); Console.WriteLine("當前的線程名稱爲：" + Thread.CurrentThread.Name); socket.Send(Encoding.UTF8.GetBytes(ipAddress)); } catch (Exception ex) { if (socketList.Contains(this.socket)) socketList.Remove(this.socket); Console.WriteLine("有一個遠程連接 " + ipAddress + " 關閉"); break; } } } } } }

 

Program.cs

 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; using System.Net.Sockets; using System.Net; using System.IO; using System.Collections; namespace SocketTestServer { class Program { private static List<Socket> list; private static ServerMonitor server; static void Main(string[] args) { //Console.WriteLine("================Socket服務開啓======================"); server = new ServerMonitor(); //建立一個線程，用於創建Socket來監聽策略請求和發送。 ThreadStart pcts = new ThreadStart(server.PolicyThread); Thread policythread = new Thread(pcts); policythread.Start(); //建立一個線程，用於創建Socket來監聽信息請求和發送。 ThreadStart infots = new ThreadStart(server.InfoThread); Thread infothread = new Thread(infots); infothread.Start(); //建立一個線程。用於測試Server端詳Client端發送信息 ThreadStart SendMessage = new ThreadStart(SendMsg); Thread thread = new Thread(SendMessage); thread.Start(); } static void SendMsg() { while (true) { //每隔六秒，向所有連接到Server端的Client發送信息 Thread.Sleep(6000); list = ServerMonitor.socketList; foreach (Socket s in list) { try { IPEndPoint endPoint = s.RemoteEndPoint as IPEndPoint; string msg = endPoint.Address.ToString(); s.Send(Encoding.UTF8.GetBytes(msg)); } catch (Exception ex) { if (list.Contains(s)) list.Remove(s); Console.WriteLine("有一個連接Client關閉"); } } Console.WriteLine("Now Connection Count is "+list.Count); } } } }