c# UDP广播
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.Sockets;
using System.Net;
using System.Threading;
namespace UDP2
{
public partial class Form1 : Form
{
private UdpClient sendUdpClient;
private UdpClient receiveUpdCLient;
public Form1()
{
InitializeComponent();
IPAddress[] ips = Dns.GetHostAddresses("");
textBox1.Text = ips[0].ToString();
int port = 5000;
textBox2.Text = port.ToString();
textBox4.Text = ips[0].ToString();
textBox3.Text = port.ToString();
}
private void textBox4_TextChanged(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
IPAddress localIp = IPAddress.Parse(textBox1.Text);
IPEndPoint localIpEndPoint = new IPEndPoint(localIp, int.Parse(textBox2.Text));
receiveUpdCLient = new UdpClient(localIpEndPoint);
Thread receiceThread = new Thread(ReceiveMessage);
receiceThread.Start();
}
//接受消息方法
private void ReceiveMessage()
{
IPEndPoint remoteIpEndPoint = new IPEndPoint(IPAddress.Any, 0);//获得连接到本机的远程机器的IPENDPOINT
while (true)
{
try
{
//关闭receiveUdpClient时此时会产生异常
byte[] receiceBytes = receiveUpdCLient.Receive(ref remoteIpEndPoint);
string message = Encoding.Unicode.GetString(receiceBytes);
//显示消息内容
ShowMessageforView(listBox1, string.Format("{0}[{1}])", remoteIpEndPoint, message));
}
catch
{
break;
}
}
}
//利用委托回调机制实现界面上消息内容显示
delegate void ShowMessageforViewCallBack(ListBox listbox, string text);
private void ShowMessageforView(ListBox listbox, string text)
{
if (listbox.InvokeRequired)
{
ShowMessageforViewCallBack showMessageforViewCallback = ShowMessageforView;
listbox.Invoke(showMessageforViewCallback, new object[] { listbox, text });
}
else
{
listBox1.Items.Add(text);
listBox1.SelectedIndex = listBox1.Items.Count - 1;
listBox1.ClearSelected();
}
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox5.Text == string.Empty)
{
MessageBox.Show("发送内容不能为空", "提示");
return;
}
//选择发送模式
if (checkBox1.Checked == true)
{ //匿名模式(套接字绑定的端口由系统随机分配)
sendUdpClient = new UdpClient(0);
}
else
{
//实名模式(套接字绑定到本地指定的端口)
IPAddress localIP = IPAddress.Parse(textBox1.Text);
IPEndPoint localIpEndPoint = new IPEndPoint(localIP, int.Parse(textBox2.Text));
sendUdpClient = new UdpClient(localIpEndPoint);
}
Thread sendThread = new Thread(SendMessage);
sendThread.Start(textBox5.Text);
}
//发送消息方法
public void SendMessage(object obj)
{
string message = (string)obj;
byte[] sendbytes = Encoding.Unicode.GetBytes(message);
IPAddress remoteIp = IPAddress.Parse(textBox4.Text);
IPEndPoint remoteIpEndPoint = new IPEndPoint(remoteIp, int.Parse(textBox3.Text));
//显示消息内容
sendUdpClient.Send(sendbytes, sendbytes.Length, remoteIpEndPoint);
sendUdpClient.Close();
ResetMessageText(textBox5);
}
delegate void ResetMessageCallback(TextBox textbox);
private void ResetMessageText(TextBox textbox)
{
// Control.InvokeRequired属性代表
// 如果控件的处理与调用线程在不同线程上创建的，则为true,否则为false
if (textbox.InvokeRequired)
{
ResetMessageCallback resetMessagecallback = ResetMessageText;
textbox.Invoke(resetMessagecallback, new object[] { textbox });
}
else
{
textbox.Clear();
textbox.Focus();
}
}
private void button3_Click(object sender, EventArgs e)
{
receiveUpdCLient.Close();
}
private void button2_Click(object sender, EventArgs e)
{
this.listBox1.Items.Clear();
}
}
}
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.Sockets;
using System.Net;
using System.Threading;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
EndPoint ep;
Socket socke;
private void button1_Click(object sender, EventArgs e)
{
socke = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9095); //初始化
ep = (EndPoint)iep;
socke.Bind(iep);
Thread re = new Thread(ReceiveMessage);
re.Start(socke);
}
private void ReceiveMessage(object o)
{
Socket socke = o as Socket;
string msg;
byte[] data = new byte[1024];
while (true)
{
try
{
// 关闭receiveUdpClient时此时会产生异常
int receiveBytes = socke.ReceiveFrom(data, ref ep);
string message = Encoding.Unicode.GetString(data,0,receiveBytes);
// 显示消息内容
ShowMessageforView(lstbxMessageView, string.Format("{0}[{1}]", ep, message));
}
catch
{
break;
}
}
}
//接受消息
delegate void ShowMessageforViewCallBack(ListBox listbox, string text);
private void ShowMessageforView(ListBox listbox, string text)
{
if (listbox.InvokeRequired)
{
ShowMessageforViewCallBack showMessageforViewCallback = ShowMessageforView;
listbox.Invoke(showMessageforViewCallback, new object[] { listbox, text });
}
else
{
lstbxMessageView.Items.Add(text);
for (int i = 0; i < lstbxMessageView.Items.Count; i++)
{
if (lstbxMessageView.Items[i].ToString().Contains("172.16.5.58"))
{
lstbxMessageView.Items.Clear();
}
}
lstbxMessageView.SelectedIndex = lstbxMessageView.Items.Count - 1;
lstbxMessageView.ClearSelected();
}
}
private void button2_Click(object sender, EventArgs e)
{
Thread sendThread = new Thread(SendMessage);
sendThread.Start(textBox1.Text);
}
public void SendMessage(object obj)
{
string message = (string)obj;
Socket sockes = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep=new IPEndPoint(IPAddress.Parse("172.16.255.255"),9095);
sockes.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
//显示消息内容
byte[] sendbytes = Encoding.Unicode.GetBytes(message);
sockes.SendTo(sendbytes, iep);
sockes.Close();
}
}
}
