C# 利用websocket实现简易聊天功能——客户端

前言

• 使用C#语言进行开发，基于.NET FrameWork4
• 功能包含群聊，和私聊
• 参考C# 利用websocket实现简易聊天功能——服务端

界面

界面设计代码

namespace chat_client
{
    partial class Form1
    {
        /// 

        /// 必需的设计器变量。
        /// 
        private System.ComponentModel.IContainer components = null;

        /// 

        /// 清理所有正在使用的资源。
        /// 
        /// 如果应释放托管资源，为 true；否则为 false。
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// 

        /// 设计器支持所需的方法 - 不要修改
        /// 使用代码编辑器修改此方法的内容。
        /// 
        private void InitializeComponent()
        {
            this.buttonSend = new System.Windows.Forms.Button();
            this.textBoxMsg = new System.Windows.Forms.TextBox();
            this.textBoxLog = new System.Windows.Forms.TextBox();
            this.buttonStart = new System.Windows.Forms.Button();
            this.labelPort = new System.Windows.Forms.Label();
            this.textBoxPort = new System.Windows.Forms.TextBox();
            this.labelIP = new System.Windows.Forms.Label();
            this.textBoxIP = new System.Windows.Forms.TextBox();
            this.labelName = new System.Windows.Forms.Label();
            this.textBoxName = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // buttonSend
            // 
            this.buttonSend.Location = new System.Drawing.Point(769, 504);
            this.buttonSend.Name = "buttonSend";
            this.buttonSend.Size = new System.Drawing.Size(99, 43);
            this.buttonSend.TabIndex = 15;
            this.buttonSend.Text = "发送";
            this.buttonSend.UseVisualStyleBackColor = true;
            this.buttonSend.Click += new System.EventHandler(this.buttonSend_Click);
            // 
            // textBoxMsg
            // 
            this.textBoxMsg.Location = new System.Drawing.Point(36, 504);
            this.textBoxMsg.Name = "textBoxMsg";
            this.textBoxMsg.Size = new System.Drawing.Size(653, 25);
            this.textBoxMsg.TabIndex = 14;
            // 
            // textBoxLog
            // 
            this.textBoxLog.Location = new System.Drawing.Point(36, 78);
            this.textBoxLog.Multiline = true;
            this.textBoxLog.Name = "textBoxLog";
            this.textBoxLog.Size = new System.Drawing.Size(832, 406);
            this.textBoxLog.TabIndex = 13;
            // 
            // buttonStart
            // 
            this.buttonStart.Location = new System.Drawing.Point(726, 18);
            this.buttonStart.Name = "buttonStart";
            this.buttonStart.Size = new System.Drawing.Size(142, 45);
            this.buttonStart.TabIndex = 12;
            this.buttonStart.Text = "连接服务器";
            this.buttonStart.UseVisualStyleBackColor = true;
            this.buttonStart.Click += new System.EventHandler(this.buttonStart_Click);
            // 
            // labelPort
            // 
            this.labelPort.AutoSize = true;
            this.labelPort.Location = new System.Drawing.Point(267, 33);
            this.labelPort.Name = "labelPort";
            this.labelPort.Size = new System.Drawing.Size(54, 15);
            this.labelPort.TabIndex = 11;
            this.labelPort.Text = "port：";
            // 
            // textBoxPort
            // 
            this.textBoxPort.Location = new System.Drawing.Point(327, 33);
            this.textBoxPort.Name = "textBoxPort";
            this.textBoxPort.Size = new System.Drawing.Size(100, 25);
            this.textBoxPort.TabIndex = 10;
            this.textBoxPort.Text = "6666";
            // 
            // labelIP
            // 
            this.labelIP.AutoSize = true;
            this.labelIP.Location = new System.Drawing.Point(74, 33);
            this.labelIP.Name = "labelIP";
            this.labelIP.Size = new System.Drawing.Size(31, 15);
            this.labelIP.TabIndex = 9;
            this.labelIP.Text = "IP:";
            // 
            // textBoxIP
            // 
            this.textBoxIP.Location = new System.Drawing.Point(125, 30);
            this.textBoxIP.Name = "textBoxIP";
            this.textBoxIP.Size = new System.Drawing.Size(100, 25);
            this.textBoxIP.TabIndex = 8;
            this.textBoxIP.Text = "127.0.0.1";
            // 
            // labelName
            // 
            this.labelName.AutoSize = true;
            this.labelName.Location = new System.Drawing.Point(473, 33);
            this.labelName.Name = "labelName";
            this.labelName.Size = new System.Drawing.Size(67, 15);
            this.labelName.TabIndex = 17;
            this.labelName.Text = "用户名：";
            // 
            // textBoxName
            // 
            this.textBoxName.Location = new System.Drawing.Point(546, 30);
            this.textBoxName.Name = "textBoxName";
            this.textBoxName.Size = new System.Drawing.Size(100, 25);
            this.textBoxName.TabIndex = 16;
            this.textBoxName.Text = "ant1";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(904, 564);
            this.Controls.Add(this.labelName);
            this.Controls.Add(this.textBoxName);
            this.Controls.Add(this.buttonSend);
            this.Controls.Add(this.textBoxMsg);
            this.Controls.Add(this.textBoxLog);
            this.Controls.Add(this.buttonStart);
            this.Controls.Add(this.labelPort);
            this.Controls.Add(this.textBoxPort);
            this.Controls.Add(this.labelIP);
            this.Controls.Add(this.textBoxIP);
            this.Name = "Form1";
            this.Text = "客户端";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button buttonSend;
        private System.Windows.Forms.TextBox textBoxMsg;
        private System.Windows.Forms.TextBox textBoxLog;
        private System.Windows.Forms.Button buttonStart;
        private System.Windows.Forms.Label labelPort;
        private System.Windows.Forms.TextBox textBoxPort;
        private System.Windows.Forms.Label labelIP;
        private System.Windows.Forms.TextBox textBoxIP;
        private System.Windows.Forms.Label labelName;
        private System.Windows.Forms.TextBox textBoxName;
    }
}

源代码

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

namespace chat_client
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public Socket clientSocket;
       

        private void buttonStart_Click(object sender, EventArgs e)
        {
            // 客户端连接服务器
            // 1 创建socket对象
            clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //2、绑定ip和端口
            String ip = textBoxIP.Text;
            int port = Convert.ToInt32(textBoxPort.Text);
            try
            {
                clientSocket.Connect(new IPEndPoint(IPAddress.Parse(ip), port));
            }
            catch
            {
                MessageBox.Show("连接服务器失败");
            }
            //4、发送name
            byte[] data = Encoding.Default.GetBytes(textBoxName.Text);
            clientSocket.Send(data, 0, data.Length, SocketFlags.None);
            //3、接受消息
            Thread thread = new Thread(new ParameterizedThreadStart(recevie));
            thread.IsBackground = true;// 设置为后台线程
            thread.Start(clientSocket);
            buttonStart.Enabled = false;
        }

        private void recevie(object socket)
        {
            var proxSocket = socket as Socket;
            byte[] data = new byte[1024 * 1024];
            String msg;
            int len = 0;
            while (true)
            {
                try
                {
                    len = proxSocket.Receive(data, 0, data.Length, SocketFlags.None);
                }
                catch
                {
                    stopConnect();//关闭连接
                    return;
                }

                if (len <= 0)
                {
                    //客户端正常退出
                    msg = String.Format("服务器{0}发送异常",
                   proxSocket.RemoteEndPoint.ToString());
                    stopConnect();//关闭连接
                    return;//结束当前接受客户端数据的异步线程
                }
                //显示消息
                msg = Encoding.Default.GetString(data, 0, len);
                showLog(msg);
            }
        }

        private void stopConnect()
        {
            try
            {
                if (clientSocket.Connected)
                {
                    clientSocket.Shutdown(SocketShutdown.Both);
                    clientSocket.Close(100);
                }
            }
            catch
            {

            }
           
        }

        private void showLog(String msg)
        {
            if (textBoxLog.InvokeRequired)
            {
                //如果是跨线程访问
                textBoxLog.Invoke(new Action<String>(
                   s => {
                       this.textBoxLog.Text += msg + "\r\n";
                   }), msg);
            }
            else
            {
                this.textBoxLog.Text += msg;
            }
        }

        private void buttonSend_Click(object sender, EventArgs e)
        {
            if (clientSocket.Connected)
            {
                //先判断是否还有服务器处于连接状态
                byte[] data = Encoding.Default.GetBytes(textBoxMsg.Text);
                clientSocket.Send(data, 0, data.Length, SocketFlags.None);
                textBoxMsg.Text = "";
            }
            else
            {
                MessageBox.Show("与服务器断开连接");
            }
        }
    }
}

运行截图

• 打开多个运行程序，在项目生成可执行文件后，在项目文件目录下，找到bin\Debug
  可以点击几个可执行程序