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C#UDP协议客户端工具类

1 工具类(Udp_Client.cs)
2 测试窗体
- 2.1 窗体示例
- 2.2 Form.cs
- 2.3 Form1.Designer.cs

1 工具类(Udp_Client.cs)

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;namespace Demo_UDPTest
{public class Udp_Client{private UdpClient _client;private EventHandler<UdpMsg> callbackEventDataReceived;private bool _isRunning;/// <summary>/// 本机客户端接受数据端口/// </summary>public int Port { get; private set; } = -1;/// <summary>/// 客户端运行状态/// </summary>public bool IsOpen => _isRunning;/// <summary>/// 构造函数/// </summary>/// <param name="callbackEventDataReceived">接受缓冲区回调事件</param>public Udp_Client(EventHandler<UdpMsg> callbackEventDataReceived){this.callbackEventDataReceived = callbackEventDataReceived;}/// <summary>/// 创建发送/接收客户端/// </summary>/// <param name="port"></param>/// <returns></returns>public bool OpenClient(int port){Port = port;Open();return IsOpen;}/// <summary>/// 创建发送客户端/// </summary>/// <returns></returns>public bool OpenClient(){Open();return IsOpen;}/// <summary>/// 打开客户端/// </summary>private void Open(){try{if (IsOpen){CloseClient();}_client = Port < 0 ? new UdpClient() : new UdpClient(Port);_isRunning = true;// 客户端创建一个新的线程来处理通信new Task(Received).Start();}catch (Exception ex){}}/// <summary>/// 关闭客户端/// </summary>public void CloseClient(){_isRunning = false;_client?.Close();_client = null;}/// <summary>/// 向目标端口发送数据/// </summary>/// <param name="data">数据报</param>/// <param name="endPoint">表示要将数据报发送到的主机和端口</param>public void Send(byte[] data, IPEndPoint endPoint){if (IsOpen == false) return;//string message = "Hello, UDP Receiver!";//byte[] data = Encoding.UTF8.GetBytes(message);// 发送数据_client.Send(data, data.Length, endPoint);}/// <summary>/// 接受来自远程主机发送的消息/// </summary>public void Received(){while (_isRunning){try{IPEndPoint senderEndpoint = new IPEndPoint(IPAddress.Any, 0);// 接收数据byte[] buffer = _client.Receive(ref senderEndpoint);callbackEventDataReceived?.Invoke(null, new UdpMsg(senderEndpoint, buffer));}catch (Exception ex){Console.WriteLine($"端口：{Port},{ex.Message}");}}}public class UdpMsg : EventArgs{/// <summary>/// 远程主机地址以及端口/// </summary>public IPEndPoint RemoteEP { get; set; }/// <summary>/// 数据包/// </summary>public byte[] Data { get; set; }public UdpMsg(IPEndPoint remoteEp, byte[] data){RemoteEP = remoteEp;Data = data;}}}
}

2 测试窗体

2.1 窗体示例

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2.2 Form.cs

using System;
using System.Net;
using System.Text;
using System.Windows.Forms;namespace Demo_UDPTest
{public partial class Form1 : Form{private Udp_Client _client;private int HostPort => int.Parse(txt_HostPort.Text);private IPEndPoint RemoteEp => new IPEndPoint(IPAddress.Parse(txt_IP.Text), int.Parse(txt_Port.Text));private readonly Random _random = new Random();public Form1(){InitializeComponent();Init();}public Form1(string remotePort){InitializeComponent();txt_Port.Text = remotePort;Init();}private void Init(){this.Text = "UDP客户端";btnOpenNewClient.Click += (sender, args) => new Form1(txt_HostPort.Text).Show();btnOpenClient.Click += (sender, args) => OpenClient();btnCloseClient.Click += (sender, args) => CloseClient();btn_Send.Click += (sender, args) => SendMessage();txt_HostPort.Text = _random.Next(2000, 20000).ToString();txt_Msg.Text = txt_HostPort.Text;OpenClient();}public static void RefreshForm(Form form, Action eventRefresh){if (form.InvokeRequired){form.Invoke(new EventHandler(delegate { RefreshForm(form, eventRefresh); }));}else{eventRefresh?.Invoke();}}private void SetButtionEnabled(){RefreshForm(this, () =>{btnOpenClient.Enabled = _client?.IsOpen == false;btnCloseClient.Enabled = _client?.IsOpen == true;});}private void AppendText(object sender, Udp_Client.UdpMsg e){RefreshForm(this, () =>{richTextBox1.AppendText(e.RemoteEP.ToString());richTextBox1.AppendText("\t");richTextBox1.AppendText(Encoding.UTF8.GetString(e.Data));richTextBox1.AppendText(Environment.NewLine);richTextBox1.ScrollToCaret();});}private void OpenClient(){_client = new Udp_Client(AppendText);_client?.OpenClient(HostPort);SetButtionEnabled();}private void CloseClient(){_client?.CloseClient();SetButtionEnabled();}private void SendMessage(){string message = txt_Msg.Text;byte[] data = Encoding.UTF8.GetBytes(message);_client?.Send(data, RemoteEp);}}
}

2.3 Form1.Designer.cs

namespace Demo_UDPTest
{partial class Form1{/// <summary>/// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary>/// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);}#region Windows 窗体设计器生成的代码/// <summary>/// 设计器支持所需的方法 - 不要修改/// 使用代码编辑器修改此方法的内容。/// </summary>private void InitializeComponent(){this.txt_IP = new System.Windows.Forms.TextBox();this.txt_Port = new System.Windows.Forms.TextBox();this.label1 = new System.Windows.Forms.Label();this.label2 = new System.Windows.Forms.Label();this.btnOpenClient = new System.Windows.Forms.Button();this.btnCloseClient = new System.Windows.Forms.Button();this.txt_HostPort = new System.Windows.Forms.TextBox();this.label3 = new System.Windows.Forms.Label();this.txt_Msg = new System.Windows.Forms.TextBox();this.btn_Send = new System.Windows.Forms.Button();this.richTextBox1 = new System.Windows.Forms.RichTextBox();this.btnOpenNewClient = new System.Windows.Forms.Button();this.label4 = new System.Windows.Forms.Label();this.SuspendLayout();// // txt_IP// this.txt_IP.Location = new System.Drawing.Point(24, 154);this.txt_IP.Name = "txt_IP";this.txt_IP.Size = new System.Drawing.Size(100, 21);this.txt_IP.TabIndex = 0;this.txt_IP.Text = "127.0.0.1";// // txt_Port// this.txt_Port.Location = new System.Drawing.Point(24, 220);this.txt_Port.Name = "txt_Port";this.txt_Port.Size = new System.Drawing.Size(100, 21);this.txt_Port.TabIndex = 0;// // label1// this.label1.AutoSize = true;this.label1.Location = new System.Drawing.Point(22, 139);this.label1.Name = "label1";this.label1.Size = new System.Drawing.Size(41, 12);this.label1.TabIndex = 1;this.label1.Text = "目标IP";// // label2// this.label2.AutoSize = true;this.label2.Location = new System.Drawing.Point(22, 195);this.label2.Name = "label2";this.label2.Size = new System.Drawing.Size(53, 12);this.label2.TabIndex = 1;this.label2.Text = "目标端口";// // btnOpenClient// this.btnOpenClient.Location = new System.Drawing.Point(46, 85);this.btnOpenClient.Name = "btnOpenClient";this.btnOpenClient.Size = new System.Drawing.Size(60, 23);this.btnOpenClient.TabIndex = 2;this.btnOpenClient.Text = "打开";this.btnOpenClient.UseVisualStyleBackColor = true;// // btnCloseClient// this.btnCloseClient.Location = new System.Drawing.Point(112, 85);this.btnCloseClient.Name = "btnCloseClient";this.btnCloseClient.Size = new System.Drawing.Size(60, 23);this.btnCloseClient.TabIndex = 2;this.btnCloseClient.Text = "关闭";this.btnCloseClient.UseVisualStyleBackColor = true;// // txt_HostPort// this.txt_HostPort.Location = new System.Drawing.Point(60, 52);this.txt_HostPort.Name = "txt_HostPort";this.txt_HostPort.Size = new System.Drawing.Size(100, 21);this.txt_HostPort.TabIndex = 0;// // label3// this.label3.AutoSize = true;this.label3.Location = new System.Drawing.Point(22, 55);this.label3.Name = "label3";this.label3.Size = new System.Drawing.Size(29, 12);this.label3.TabIndex = 1;this.label3.Text = "端口";// // txt_Msg// this.txt_Msg.Location = new System.Drawing.Point(24, 287);this.txt_Msg.Name = "txt_Msg";this.txt_Msg.Size = new System.Drawing.Size(161, 21);this.txt_Msg.TabIndex = 3;this.txt_Msg.Text = "ABC";// // btn_Send// this.btn_Send.Location = new System.Drawing.Point(125, 314);this.btn_Send.Name = "btn_Send";this.btn_Send.Size = new System.Drawing.Size(60, 23);this.btn_Send.TabIndex = 2;this.btn_Send.Text = "发送";this.btn_Send.UseVisualStyleBackColor = true;// // richTextBox1// this.richTextBox1.Location = new System.Drawing.Point(204, 52);this.richTextBox1.Name = "richTextBox1";this.richTextBox1.Size = new System.Drawing.Size(258, 311);this.richTextBox1.TabIndex = 4;this.richTextBox1.Text = "";// // btnOpenNewClient// this.btnOpenNewClient.Location = new System.Drawing.Point(204, 12);this.btnOpenNewClient.Name = "btnOpenNewClient";this.btnOpenNewClient.Size = new System.Drawing.Size(258, 23);this.btnOpenNewClient.TabIndex = 5;this.btnOpenNewClient.Text = "启动新客户端";this.btnOpenNewClient.UseVisualStyleBackColor = true;// // label4// this.label4.AutoSize = true;this.label4.Location = new System.Drawing.Point(22, 272);this.label4.Name = "label4";this.label4.Size = new System.Drawing.Size(53, 12);this.label4.TabIndex = 1;this.label4.Text = "消息内容";// // Form1// this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.ClientSize = new System.Drawing.Size(493, 378);this.Controls.Add(this.btnOpenNewClient);this.Controls.Add(this.richTextBox1);this.Controls.Add(this.txt_Msg);this.Controls.Add(this.btn_Send);this.Controls.Add(this.btnCloseClient);this.Controls.Add(this.btnOpenClient);this.Controls.Add(this.label3);this.Controls.Add(this.label4);this.Controls.Add(this.label2);this.Controls.Add(this.label1);this.Controls.Add(this.txt_HostPort);this.Controls.Add(this.txt_Port);this.Controls.Add(this.txt_IP);this.Name = "Form1";this.Text = "UDP客户端";this.ResumeLayout(false);this.PerformLayout();}#endregionprivate System.Windows.Forms.TextBox txt_IP;private System.Windows.Forms.TextBox txt_Port;private System.Windows.Forms.Label label1;private System.Windows.Forms.Label label2;private System.Windows.Forms.Button btnOpenClient;private System.Windows.Forms.Button btnCloseClient;private System.Windows.Forms.TextBox txt_HostPort;private System.Windows.Forms.Label label3;private System.Windows.Forms.TextBox txt_Msg;private System.Windows.Forms.Button btn_Send;private System.Windows.Forms.RichTextBox richTextBox1;private System.Windows.Forms.Button btnOpenNewClient;private System.Windows.Forms.Label label4;}
}