C#網路編程.2.通訊端.TcpListener.TcpClient.服務端用戶端通訊

在TcpClient上調用GetStream()方法來獲得串連到遠端電腦的流。注意這裡我用了遠程這個詞，當在用戶端調用時，它得到串連服務端的流；當在服務端調用時，它獲得串連用戶端的流。接下來我們來看一下代碼，我們先看服務端

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net;using System.Net.Sockets;namespace SocksTest{    class Program    {        static void Main(string[] args)        {            int BufferSize=1000;            Console.WriteLine("Server is running ... ");            IPAddress ip = new IPAddress(new byte[] { 127, 0, 0, 1 });            TcpListener listener = new TcpListener(ip, 8500);            listener.Start();           // 開始偵聽            Console.WriteLine("Start Listening ...");            TcpClient remoteClient = listener.AcceptTcpClient();//接受掛起的串連請求            Console.WriteLine("Client Connected！{0} <-- {1}",                remoteClient.Client.LocalEndPoint.ToString(), remoteClient.Client.RemoteEndPoint.ToString());            NetworkStream streamClient = remoteClient.GetStream();            Byte[] buffer=new Byte[BufferSize];            int bytesRead = streamClient.Read(buffer, 0, BufferSize);            Console.WriteLine("Reading data,{0} bytes...",bytesRead);            string msg = Encoding.Unicode.GetString(buffer, 0, bytesRead);            Console.WriteLine("Received:{0}",msg);            Console.Read();        }    }}

streamClient.GetStream()方法擷取到了串連至用戶端的流，然後從流中讀出資料並儲存在了buffer緩衝中，隨後使用Encoding.Unicode.GetString()方法，從緩衝中擷取到了實際的字串。最後將字串列印在了控制台上。這段代碼有個地方需要注意：在能夠讀取的字串的總位元組數大於BufferSize的時候會出現字串截斷現象，因為緩衝中的數目總是有限的，而對於大對象，比如說圖片或者其它檔案來說，則必須採用“分次讀取然後轉存”這種方式

 

// 擷取字串byte[] buffer = new byte[BufferSize];int bytesRead;          // 讀取的位元組數MemoryStream msStream = new MemoryStream();do {    bytesRead = streamToClient.Read(buffer, 0, BufferSize);    msStream.Write(buffer, 0, bytesRead);} while (bytesRead > 0);buffer = msStream.GetBuffer();string msg = Encoding.Unicode.GetString(buffer);

 

用戶端

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Net.Sockets;namespace SocksClient{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("Client is running......");            TcpClient tcpClient;            try            {                tcpClient = new TcpClient();                tcpClient.Connect("localhost", 8500);            }            catch (Exception e)            {                Console.WriteLine(e.ToString());                Console.Read();                return;            }            Console.WriteLine("Server Connected！{0} --> {1}",                tcpClient.Client.LocalEndPoint.ToString(), tcpClient.Client.RemoteEndPoint.ToString());            NetworkStream streamServer = tcpClient.GetStream();            string msg = "Hi server,this is from Client";            byte[] buffer=Encoding.Unicode.GetBytes(msg);            streamServer.Write(buffer, 0, buffer.Length);            Console.Read();        }    }}

 

同樣的，和上篇的原理相同，如何?多用戶端與伺服器通訊等等，我這裡拋個磚，接下來由大家自己繼續深入了。

1. 單C<--->單S 通訊

2. 多C<--->單S 通訊

3. 單C多資訊<--->單S 通訊

4. 多C多資訊<--->單S 通訊