图文版网络聊天程序

1、服务器端

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;//添加命名空间引用using System.Net;using System.Net.Sockets;using System.Threading;namespace 服务器端{    public partial class Form1 : Form    {        private Socket socket;        private Socket clientSocket;        private Thread tAcceptMsg;        public Form1()        {            InitializeComponent();            CheckForIllegalCrossThreadCalls = false;        }        private void AcceptMessage()        {            clientSocket = socket.Accept();            this.labelState.Text = "与客户机" + clientSocket.RemoteEndPoint.ToString() + "成功建立连接。";            while (true)            {                try                {                    NetworkStream nStream = new NetworkStream(clientSocket);                    byte[] datasize = new byte[4];                    nStream.Read(datasize, 0, 4);                    int size = System.BitConverter.ToInt32(datasize, 0);                    byte[] Message = new byte[size];                    int dataleft = size;                    int start = 0;                    while (dataleft > 0)                    {                        int recv = nStream.Read(Message, start, dataleft);                        start += recv;                        dataleft -= recv;                    }                    this.richTextBoxReceive.Rtf = System.Text.Encoding.Unicode.GetString(Message);                }                catch                {                    this.labelState.Text = "与客户机断开连接。";                    break;                }            }        }                private void buttonStatr_Click(object sender, EventArgs e)        {            this.buttonStatr.Enabled = false;            IPAddress ip = IPAddress.Parse(this.textBoxIP.Text);            IPEndPoint IPP = new IPEndPoint(ip, Int32.Parse(this.textBoxPort.Text));            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            socket.Bind(IPP);            socket.Listen(10);            tAcceptMsg = new Thread(new ThreadStart(AcceptMessage));            tAcceptMsg.Start();        }        private void richTextBoxSend_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar == (char)Keys.Enter)            {                string str = this.richTextBoxSend.Rtf;                int i = str.Length;                if (i == 0) return;                else i *= 2; //str为UniCode编码，每个字符占2B，实际字节数应*2                byte[] datasize = new byte[4];                //将32位整数值转换为字节数组                datasize = System.BitConverter.GetBytes(i);                byte[] sendbytes = System.Text.Encoding.Unicode.GetBytes(str);                try                {                    NetworkStream netStream = new NetworkStream(clientSocket);                    netStream.Write(datasize, 0, 4);                    netStream.Write(sendbytes, 0, sendbytes.Length);                    netStream.Flush();                    this.richTextBoxSend.Rtf = "";                }                catch                {                    MessageBox.Show("信息无法发送！");                }            }        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            try            {                socket.Close();                tAcceptMsg.Abort();            }            catch { }        }     }}

2、客户端

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;//添加命名空间using System.Net;using System.Net.Sockets;using System.Threading;namespace 客户端{    public partial class Form1 : Form    {        private Socket socket;        private Thread tAcceptMsg;        public Form1()        {            InitializeComponent();            CheckForIllegalCrossThreadCalls = false;        }        private void AcceptMessage()        {            while (true)            {                try                {                    NetworkStream nstream = new NetworkStream(socket);                    byte[] datasize = new byte[4];                    nstream.Read(datasize, 0, 4);                    int size = System.BitConverter.ToInt32(datasize, 0);                    byte[] message = new byte[size];                    int dataleft = size,start=0;                    while (dataleft > 0)                    {                        int recv = nstream.Read(message, start, dataleft);                        start += recv;                        dataleft -= recv;                    }                    this.richTextBoxReceive.Rtf = System.Text.Encoding.Unicode.GetString(message);                }                catch { }            }        }        private void richTextBoxSend_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar == (char)Keys.Enter)            {                string str = this.richTextBoxSend.Rtf;                int i = str.Length;                if (i == 0) return;                else i *= 2;                byte[] datasize = new byte[4];                datasize = System.BitConverter.GetBytes(i);                byte[] sendBytes = System.Text.Encoding.Unicode.GetBytes(str);                try                {                    NetworkStream netStream = new NetworkStream(socket);                    netStream.Write(datasize, 0, 4); //发送信息长度大小                    netStream.Write(sendBytes, 0, sendBytes.Length);//发送信息                    netStream.Flush();                    this.richTextBoxSend.Rtf = "";                }                catch                {                    MessageBox.Show("信息无法发送！！");                }            }        }        private void buttonLink_Click(object sender, EventArgs e)        {            IPAddress ip = IPAddress.Parse(this.textBoxIP.Text);            IPEndPoint IPP = new IPEndPoint(ip, Int32.Parse(this.textBoxPort.Text));            socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);            try            {                socket.Connect(IPP);            }            catch            {                MessageBox.Show("与服务器连接失败！");                return;            }            this.labelState.Text = "与服务器" + this.textBoxIP.Text + ":" + this.textBoxPort.Text + "成功建立连接。";            tAcceptMsg = new Thread(new ThreadStart(AcceptMessage));            tAcceptMsg.IsBackground = true;            tAcceptMsg.Start();            this.buttonLink.Enabled = false;        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            try            {                socket.Close();                tAcceptMsg.Abort();            }            catch { }        }    }}