(转)winform下TCP通信的简单应用

本文转载自：http://blog.csdn.net/wanlong360599336/article/details/7557064

先看效果图：

TCP比较繁琐的就是三次握手定理，每次再发送数据前都要先建立连接确认。

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

namespace TCP
{
    public partial class Form1 : Form
    {
        public Form1()
        {  

            InitializeComponent();
        }
        //启动服务端
        TcpListener listener;
        delegate void SetTextCallBack(string text);
        private void button1_Click(object sender, EventArgs e)
        {
            //try
            //{
                label2.Text = "服务端已开启..";
                button1.Enabled = false;
                listener = new TcpListener(IPAddress.Any, );
                listener.Start();
                Thread th = new Thread(new ThreadStart(ReceiveMsg));
                th.Start();
                th.IsBackground = true;
            //}
            //catch (Exception ex)
            //{
            //    Console.WriteLine(ex.Message);
            //}  

        }  

        public void ReceiveMsg()
        {  

            while (true)
            {
                TcpClient client = listener.AcceptTcpClient();
                byte[] buffer = new byte[];
                NetworkStream stream = client.GetStream();
                int len = stream.Read(buffer, , buffer.Length);
                string msg = Encoding.Unicode.GetString(buffer, , len);
                SetText(msg);  

                stream.Flush();
                stream.Close();
                client.Close();  

            }  

        }
        public void SetText(string text)
        {
            try
            {
                if (this.richTextBox1.InvokeRequired)
                {
                    SetTextCallBack d = new SetTextCallBack(SetText);
                    this.Invoke(d, new object[] { text });
                }
                else
                {  

                    this.richTextBox1.Text += DateTime.Now.ToString() + "\n" + text + "\n";
                }  

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }  

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                //FileStream fs = new FileStream(textBox2.Text,FileMode.OpenOrCreate,FileAccess.Read);
                //byte[] buff=new byte[fs.Length];
                //int rea = fs.Read(buff,0,buff.Length);
                string ip = textBox1.Text;
                string msg = richTextBox2.Text;
                //msg = string.Format("{0}:{1}:{2}:{3}:{4}:{5}",1,DateTime.Now.Ticks,"007","www","32",msg);
                TcpClient client = new TcpClient();
                client.Connect(IPAddress.Parse(ip), );
                NetworkStream stream = client.GetStream();
                byte[] buffer = Encoding.Unicode.GetBytes(msg);
                stream.Write(buffer, , buffer.Length);
                //stream.Write(buff,0,rea);
                //label6.Text = "文件发送成功！";
                MessageBox.Show("发送成功！");
            }
            catch (Exception ex)
            {
                MessageBox.Show("服务端未开启！");
            }
        }  

        private void button2_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                this.button2_Click(sender,e);
            }
        }
        //存放的目录
       // private void button4_Click(object sender, EventArgs e)
       // {
        //    FolderBrowserDialog fbd = new FolderBrowserDialog();
        //    if(fbd.ShowDialog()==DialogResult.OK)
        //    {
         //       textBox3.Text = fbd.SelectedPath;
          //  }
       // }
        //发送的文件
       /// private void button3_Click(object sender, EventArgs e)
       //{
       //     OpenFileDialog ofd = new OpenFileDialog();
       //     if(ofd.ShowDialog()==DialogResult.OK)
       //     {
       //         textBox2.Text = ofd.FileName;
       //     }
       // }
       //文件发送
        //private void button5_Click(object sender, EventArgs e)
        //{
        //    FileStream fs = new FileStream(textBox2.Text,FileMode.Open,FileAccess.Read);
        //    byte[] buffer = new byte[fs.Length];
        //    int rea=fs.Read(buffer,0,buffer.Length);
        //    TcpClient client = new TcpClient();
        //    string ip = textBox1.Text;
        //    client.Connect(IPAddress.Parse(ip),3000);
        //    NetworkStream ns = client.GetStream();
        //    ns.Write(buffer,0,rea);
        //    MessageBox.Show("文件发送成功！");
        //    fs.Flush();
        //    ns.Flush();
        //    fs.Close();
        //    ns.Close();
        //}    }
}