WPF UDP Socket通信

直接上代码：

xmal:

<Window x:Class="UDPSocket.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="600" Width="800"  WindowStartupLocation="CenterScreen" Closing="MainWindow_Closing">
    <Grid>
        <GroupBox Header="发送数据" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="380" Height="545" Background="AliceBlue">
            <StackPanel>
                <RichTextBox Name="txtSendMssg" HorizontalAlignment="Left" Margin="5" VerticalAlignment="Top" Height="450" Width="355" Background="White"/>
                <Button Margin="50 10" Content="发送数据" Height="45" Click="btnSend_Click"/>
            </StackPanel>
        </GroupBox>
        <GroupBox Header="接收数据" HorizontalAlignment="Right" Margin="0,10,10,0" VerticalAlignment="Top" Width="380" Height="545" Background="AliceBlue">
            <StackPanel>
                <RichTextBox Name="txtRecvMssg" HorizontalAlignment="Left" Margin="5,5,5,5" VerticalAlignment="Top" Height="450" Width="355" Background="White"/>
                <Button Margin="50 10" Content="接收数据/停止接收" Height="45" Click="btnRecv_Click"/>
            </StackPanel>
        </GroupBox>
    </Grid>
</Window>

后台：

using System.Net.Sockets;
using System.Net;
using System.Threading;
using System.Windows.Threading;

namespace UDPSocket
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        /// <summary>  
        /// 用于UDP发送的网络服务类  
        /// </summary>  
        private UdpClient udpcSend;
        /// <summary>  
        /// 用于UDP接收的网络服务类  
        /// </summary>  
        private UdpClient udpcRecv;

        /// <summary>  
        /// 按钮：发送数据  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void btnSend_Click(object sender, EventArgs e)
        {
            TextRange tr = new TextRange(txtSendMssg.Document.ContentStart, txtSendMssg.Document.ContentEnd);
            if (string.IsNullOrWhiteSpace(tr.Text))
            {
                MessageBox.Show("请先输入待发送内容");
                return;
            }

            // 匿名发送  
            //udpcSend = new UdpClient(0);             // 自动分配本地IPv4地址  
            // 实名发送  
            IPEndPoint localIpep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1234); // 本机IP，指定的端口号  
            udpcSend = new UdpClient(localIpep);
            Thread thrSend = new Thread(SendMessage);
            thrSend.Start(tr.Text);
        }

        /// <summary>  
        /// 发送信息  
        /// </summary>  
        /// <param name="obj"></param>  
        private void SendMessage(object obj)
        {
            string message = (string)obj;
            byte[] sendbytes = Encoding.Unicode.GetBytes(message);
            IPEndPoint remoteIpep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7788); // 发送到的IP地址和端口号  
            udpcSend.Send(sendbytes, sendbytes.Length, remoteIpep);
            udpcSend.Close();
            ResetTextBox(txtSendMssg);
        }

        /// <summary>  
        /// 开关：在监听UDP报文阶段为true，否则为false  
        /// </summary>  
        bool IsUdpcRecvStart = false;
        /// <summary>  
        /// 线程：不断监听UDP报文  
        /// </summary>  
        Thread thrRecv;

        /// <summary>  
        /// 按钮：接收数据开关  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void btnRecv_Click(object sender, EventArgs e)
        {
            if (!IsUdpcRecvStart) // 未监听的情况，开始监听  
            {
                IPEndPoint localIpep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 7788); // 本机IP和监听端口号  
                udpcRecv = new UdpClient(localIpep);
                thrRecv = new Thread(ReceiveMessage);
                thrRecv.Start();
                IsUdpcRecvStart = true;
                ShowMessage(txtRecvMssg, "UDP监听器已成功启动");
            }
            else // 正在监听的情况，终止监听  
            {
                thrRecv.Abort(); // 必须先关闭这个线程，否则会异常  
                udpcRecv.Close();
                IsUdpcRecvStart = false;
                ShowMessage(txtRecvMssg, "UDP监听器已成功关闭");
            }
        }

        /// <summary>  
        /// 接收数据  
        /// </summary>  
        /// <param name="obj"></param>  
        private void ReceiveMessage(object obj)
        {
            IPEndPoint remoteIpep = new IPEndPoint(IPAddress.Any, 0);
            while (true)
            {
                try
                {
                    byte[] bytRecv = udpcRecv.Receive(ref remoteIpep);
                    string message = Encoding.Unicode.GetString(bytRecv, 0, bytRecv.Length);
                    ShowMessage(txtRecvMssg, string.Format("{0}[{1}]", remoteIpep, message.Trim()));
                }
                catch (Exception ex)
                {
                    ShowMessage(txtRecvMssg, ex.Message);
                    break;
                }
            }
        }

        // 向RichTextBox中添加文本  
        delegate void ShowMessageDelegate(RichTextBox txtbox, string message);
        private void ShowMessage(RichTextBox txtbox, string message)
        {
            //if (txtbox.InvokeRequired)
            //{
            //    ShowMessageDelegate showMessageDelegate = ShowMessage;
            //    txtbox.Dispatcher.Invoke(showMessageDelegate, new object[] { txtbox, message });
            //}
            //else
            //{
            // //   txtbox.Text += message + "\r\n";
            //}  
            Console.WriteLine(message);
        }

        // 清空指定RichTextBox中的文本  
        delegate void ResetTextBoxDelegate(RichTextBox txtbox);
        private void ResetTextBox(RichTextBox txtbox)
        {
            //if (txtbox.InvokeRequired)
            //{
            //    ResetTextBoxDelegate resetTextBoxDelegate = ResetTextBox;
            //    txtbox.Dispatcher.Invoke(resetTextBoxDelegate, new object[] { txtbox });
            //}
            //else
            //{
            ////    txtbox.Text = "";
            //}  
        }

        /// <summary>  
        /// 关闭程序，强制退出  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            Environment.Exit(0);
        } 
    }
}