C#实现UDP通讯

c#实现UDP通讯

现在在公司开发一套硬软结合的产品，这中间除了服务接口，少不了的就是udp通讯了，小主我贴出自己的代码，简单实现UDP通讯，供小白们使用，大神级的就不要来了，快走

程序代码

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
///
/// 用于UDP发送的网络服务类
///
private UdpClient udpcSend;
///
/// 用于UDP接收的网络服务类
///
private UdpClient udpcRecv;

    private void button1_Click(object sender, EventArgs e)
    {
        if (string.IsNullOrWhiteSpace(richTextBox1.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("192.168.137.1"),1991); // 本机IP，指定的端口号
        udpcSend = new UdpClient(localIpep);
        Thread thrSend = new Thread(SendMessage);
        thrSend.Start(richTextBox1.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("192.168.137.1"), 8848); // 发送到的IP地址和端口号
        udpcSend.Send(sendbytes, sendbytes.Length, remoteIpep);
        udpcSend.Close();
        ResetTextBox(richTextBox1);
    }
    /// <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;


    private void button2_Click(object sender, EventArgs e)
    {
        if (!IsUdpcRecvStart) // 未监听的情况，开始监听
        {
            IPEndPoint localIpep = new IPEndPoint(IPAddress.Parse("192.168.137.1"), 8848); // 本机IP和监听端口号
            udpcRecv = new UdpClient(localIpep);
            thrRecv = new Thread(ReceiveMessage);
            thrRecv.Start();
            IsUdpcRecvStart = true;
            ShowMessage(richTextBox2, "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(richTextBox2, "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(richTextBox2, string.Format("{0}[{1}]", remoteIpep, message));
            }
            catch (Exception ex)
            {
                ShowMessage(richTextBox2, 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.Invoke(showMessageDelegate, new object[] { txtbox, message });
        }
        else
        {
            txtbox.Text += message + "\r\n";
        }
    }

    // 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.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 Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        Environment.Exit(0);
    }


}