简单的C# Socket编程(2)

最新推荐文章于 2022-10-18 15:48:22 发布

原创最新推荐文章于 2022-10-18 15:48:22 发布 · 1.4k 阅读

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#socket #c# #server #components #object #textbox

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本文介绍了一个简单的 C# Socket 编程示例，包括服务器端与客户端的实现方式。服务器监听指定端口接收客户端消息并转换为大写返回，客户端则负责发送消息并接收处理后的响应。

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简单的C# Socket编程(2)

只是一个简单的示例。

Server,服务器代码。
使用Socket套接字连接。

using System;
 using System.Net;
 using System.Net.Sockets;
 using System.IO ;
 
 public class Echoserver
 {
     //entry point of main method.
     public static void Main()
    {
        //TcpListener is listening on the given port
        Int32 port = 1234;

//IPAddress is connetct ip address
        //IPAddress addr = IPAddress.Parse("127.0.0.1");
        IPAddress ipAddress = Dns.Resolve("localhost").AddressList[0];

TcpListener tcpListener = new TcpListener(ipAddress,port);
        tcpListener.Start();      
        Console.WriteLine("Server Started") ;            
        //Accepts a new connection
        Socket socketForClient = tcpListener.AcceptSocket();            
        //StreamWriter and StreamReader Classes for reading and writing the data to and from.
        //The server reads the meassage sent by the Client ,converts it to upper case and sends it back to the client.
        //Lastly close all the streams.
        try
        {
            if (socketForClient.Connected)
            {
                while(true)
                {
                    Console.WriteLine("Client connected");
                    NetworkStream networkStream = new NetworkStream(socketForClient);
                    StreamWriter streamWriter = new StreamWriter(networkStream);
                    StreamReader streamReader = new StreamReader(networkStream);
                    string line = streamReader.ReadLine();
                    Console.WriteLine("Read:" +line);
                    line=line.ToUpper()+ "!";
                    streamWriter.WriteLine(line);
                    Console.WriteLine("Wrote:"+line);
                    streamWriter.Flush() ;                      
                } 
            }
            socketForClient.Close();            
            Console.WriteLine("Exiting");
        }
        catch(Exception e)
        {
            Console.WriteLine(e.ToString()) ;
        }
    }
}

Client,客户端程序，在文本框中输入字符，将在列表框显示。

using System;
using System.Text;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace SocketSample
{
    public class Sample : System.Windows.Forms.Form
     {
        private System.Windows.Forms.Button btS;
        private System.Windows.Forms.TextBox t1;
        private NetworkStream networkStream ;
        private StreamReader streamReader ;
        private StreamWriter streamWriter ;
        ArrayList sb;
        TcpClient myclient;
        bool flag=false;
        private System.Windows.Forms.ListBox t2;

private System.ComponentModel.Container components = null;

public Sample()
        {
            sb = new ArrayList();
            InitializeComponent();
            if(!flag)
                Connect();

//get a Network stream from the server
            networkStream = myclient.GetStream();
            streamReader = new StreamReader(networkStream);
            streamWriter = new StreamWriter(networkStream);
            ShowMessage();
        }

protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

//Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Sample));
            this.t1 = new System.Windows.Forms.TextBox();
            this.btS = new System.Windows.Forms.Button();
            this.t2 = new System.Windows.Forms.ListBox();
            this.SuspendLayout();
            // 
            // t1
            // 
            this.t1.Location = new System.Drawing.Point(24, 32);
            this.t1.Name = "t1";
            this.t1.Size = new System.Drawing.Size(280, 21);
            this.t1.TabIndex = 0;
            this.t1.Text = "";
            this.t1.TextChanged += new System.EventHandler(this.t1_TextChanged);
            // 
            // btS
            // 
            this.btS.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("btS.BackgroundImage")));
            this.btS.Enabled = false;
            this.btS.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
            this.btS.Location = new System.Drawing.Point(320, 32);
            this.btS.Name = "btS";
            this.btS.TabIndex = 1;
            this.btS.Text = "Send";
            this.btS.Click += new System.EventHandler(this.btS_Click);
            // 
            // t2
            // 
            this.t2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.t2.Font = new System.Drawing.Font("Courier New", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.t2.ItemHeight = 15;
            this.t2.Location = new System.Drawing.Point(24, 64);
            this.t2.Name = "t2";
            this.t2.Size = new System.Drawing.Size(368, 212);
            this.t2.TabIndex = 2;
            // 
            // Sample
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);             this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
            this.ClientSize = new System.Drawing.Size(416, 297);
            this.Controls.Add(this.t2);
            this.Controls.Add(this.btS);
            this.Controls.Add(this.t1);
            this.Name = "Sample";
            this.Text = "Sample";
            this.ResumeLayout(false);

}
        #endregion

public static void Main()
        {
            Sample df=new Sample();
            df.FormBorderStyle=FormBorderStyle.Fixed3D;
            Application.Run(df);
        }

protected void Connect()
        {            
            //connect to the "localhost" at the give port
            //if you have some other server name then you can use that instead of "localhost"
    
            try
            {
                sb.Add("Conneting to Server");
                myclient = new TcpClient("localhost", 1234);
                sb.Add("Conneted,Please enter something in the textbox");
            }
            catch
            {
                sb.Add(string.Format("Failed to connect to server at {0}:1234", "localhost"));
            }
            flag = true;
        }

protected void ShowMessage()
        {
            for(int i=0;i<sb.Count;i++)
            {
                t2.Items.Add((object)sb[i].ToString());
            }
            sb.Clear();
        }

private void t1_TextChanged(object sender, System.EventArgs e)
        {
            if(t1.Text == "" )
                btS.Enabled = false;
            else
                btS.Enabled=true;
        }

private void btS_Click(object sender, System.EventArgs e)
        {
            if(t1.Text=="")
            {
                sb.Add( "Please enter something in the textbox.");
                t1.Focus();
                return ;
            }
            string s;
            try
            {            
                streamWriter.WriteLine(t1.Text);
                Console.WriteLine("Sending Message");
                streamWriter.Flush();
                s= streamReader.ReadLine();
                Console.WriteLine("Reading Message") ;
                Console.WriteLine(s) ;
                sb.Add(s);
                t1.Text = "";
                t1.Focus();
                ShowMessage();
            }
            catch
            {
                MessageBox.Show("Error.");
            }    
        }
    }
}