winform下Socket通信的简单应用

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;

namespace APP
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/******************************************
*
* 利用Socket通讯，TCP和UDP的不同用法
* TCP：面向连接，三次握手，数据安全性较高
* UDP：面向无连接，数据易丢失，安全性不高
*
******************************************/

//启动服务端
Socket SocketUdp;
Socket SocketTcp;
delegate void SetTextCallBack(string text);

//这个是启动服务端的按钮，在启动服务端后，会根据客户端发送回来的信息请求，自动将信息显示在文本框上
private void button1_Click(object sender, EventArgs e)
{
//UDP类型
SocketUdp = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
EndPoint ep = new IPEndPoint(IPAddress.Any, 3000);
SocketUdp.Bind(ep);//绑定本机IP和Port
Thread th = new Thread(new ThreadStart(ReceiveMsg));
th.IsBackground = true;
th.Start();
label2.Text = "服务器已启动";
button1.Enabled = false;

////TCP类型
//SocketTcp = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
//EndPoint ep = new IPEndPoint(IPAddress.Any, 3000);
//SocketTcp.Bind(ep);
//SocketTcp.Listen(2000);
//Thread th = new Thread(new ThreadStart(ReceiveMsg));
//th.IsBackground = true;
//th.Start();
//label2.Text = "服务器已启动";
//button1.Enabled = false;
}
public void ReceiveMsg()
{
while (true)
{
byte[] buffer = new byte[5555];
EndPoint ep = new IPEndPoint(IPAddress.Any, 3000);
int lea = SocketUdp.ReceiveFrom(buffer, ref ep);//接收远程;
string msg = Encoding.Unicode.GetString(buffer, 0, lea);
SetText(msg);
}

//while(true)
//{
//    Socket client = SocketTcp.Accept();
//    byte[] buffer=new byte[1024];
//    int lea = client.Receive(buffer);//接收远程;
//    string msg = Encoding.Unicode.GetString(buffer, 0, lea);
//    SetText(msg);
//    client.Close();
//}
}
public void SetText(string text)
{

//在这里，我强调一下，为什么我会用invoke呢，或许很多人对此不太了解，如果不用的话，会报错。我会另外抽时间给大家讲解下invoke,beigninvoke，多线程，委托与事件之间的联系的，反正大家先这么写着。
if(richTextBox1.InvokeRequired)
{
SetTextCallBack st = new SetTextCallBack(SetText);
this.Invoke(st,new object[]{text});

}
else
{
richTextBox1.Text += DateTime.Now.ToString() + "\n" + text + "\n";
}
}
//客户端
private void button2_Click(object sender, EventArgs e)
{
if (button1.Enabled ==true)
{
MessageBox.Show("服务端未启动，请先启动服务器！");
}
else
{
string msg = richTextBox2.Text;
string ip = textBox1.Text;

//UDP
Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
byte[] buffer = Encoding.Unicode.GetBytes(msg);
IPEndPoint ipe = new IPEndPoint(IPAddress.Parse(ip), 3000);
client.SendTo(buffer, buffer.Length, SocketFlags.None, ipe);
MessageBox.Show("发送成功！");

////TCP
//Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//IPEndPoint ipe = new IPEndPoint(IPAddress.Parse(ip), 3000);
//client.Connect(ipe);
//byte[] buffer = Encoding.Unicode.GetBytes(msg);
//client.Send(buffer);
//MessageBox.Show("发送成功！");

}
}
}
}