{"id":38416,"date":"2025-05-20T11:01:01","date_gmt":"2025-05-20T03:01:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38416.html"},"modified":"2025-05-20T11:01:01","modified_gmt":"2025-05-20T03:01:01","slug":"%e6%88%91%e5%b0%86%e5%9f%ba%e4%ba%8e%e4%b9%8b%e5%89%8d%e7%9a%84tcp-udp%e7%bd%91%e7%bb%9c%e5%b0%8f%e5%8a%a9%e6%89%8b%ef%bc%8c%e6%89%a9%e5%b1%95%e6%94%af%e6%8c%81%e5%a4%9a%e5%ae%a2%e6%88%b7%e7%ab%af","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38416.html","title":{"rendered":"\u6211\u5c06\u57fa\u4e8e\u4e4b\u524d\u7684TCP\/UDP\u7f51\u7edc\u5c0f\u52a9\u624b\uff0c\u6269\u5c55\u652f\u6301\u591a\u5ba2\u6237\u7aef\uff08TCP\u6a21\u5f0f\u4e0b\u670d\u52a1\u5668\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\uff09\u548c\u6587\u4ef6\u4f20\u8f93\u529f\u80fd\uff08\u652f\u6301\u53d1\u9001\u548c\u63a5\u6536\u6587\u4ef6\uff09"},"content":{"rendered":"

\u6211\u5c06\u57fa\u4e8e\u4e4b\u524d\u7684TCP\/UDP\u7f51\u7edc\u5c0f\u52a9\u624b，\u6269\u5c55\u652f\u6301\u591a\u5ba2\u6237\u7aef（TCP\u6a21\u5f0f\u4e0b\u670d\u52a1\u5668\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5）\u548c\u6587\u4ef6\u4f20\u8f93\u529f\u80fd（\u652f\u6301\u53d1\u9001\u548c\u63a5\u6536\u6587\u4ef6）\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u7684\u5f00\u53d1\u6b65\u9aa4\u548c\u5b8c\u6574\u6e90\u7801，\u5305\u542b\u591a\u5ba2\u6237\u7aef\u7ba1\u7406\u548c\u6587\u4ef6\u4f20\u8f93\u903b\u8f91\u3002<\/p>\n

\u00a0\u66f4\u65b0\u5f00\u53d1\u6b65\u9aa4 1. \u591a\u5ba2\u6237\u7aef\u652f\u6301： \u00a0 \u00a0– \u4fee\u6539TCP\u670d\u52a1\u5668，\u4f7f\u7528`List<TcpClient>`\u5b58\u50a8\u6240\u6709\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u3002 \u00a0 \u00a0– \u4e3a\u6bcf\u4e2a\u5ba2\u6237\u7aef\u5f00\u542f\u72ec\u7acb\u7684\u5f02\u6b65\u4efb\u52a1\u5904\u7406\u6d88\u606f，\u5e7f\u64ad\u6d88\u606f\u7ed9\u5176\u4ed6\u5ba2\u6237\u7aef\u3002 \u00a0 \u00a0– \u6dfb\u52a0\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u7684\u68c0\u6d4b\u548c\u6e05\u7406\u903b\u8f91\u3002<\/p>\n

2. \u6587\u4ef6\u4f20\u8f93\u529f\u80fd： \u00a0 \u00a0– \u6dfb\u52a0\u6587\u4ef6\u9009\u62e9\u6309\u94ae\u548c\u6587\u4ef6\u8def\u5f84\u663e\u793a，\u4f7f\u7528`OpenFileDialog`\u9009\u62e9\u6587\u4ef6\u3002 \u00a0 \u00a0– \u5b9e\u73b0\u6587\u4ef6\u4f20\u8f93\u534f\u8bae：\u53d1\u9001\u6587\u4ef6\u524d\u53d1\u9001\u6587\u4ef6\u540d\u548c\u6587\u4ef6\u5927\u5c0f，\u63a5\u6536\u7aef\u89e3\u6790\u5e76\u4fdd\u5b58\u3002 \u00a0 \u00a0– \u652f\u6301TCP\u548cUDP\u6587\u4ef6\u4f20\u8f93（TCP\u4f7f\u7528\u6d41，UDP\u5206\u5757\u53d1\u9001）\u3002<\/p>\n

3. \u754c\u9762\u66f4\u65b0： \u00a0 \u00a0– \u6dfb\u52a0\u6587\u4ef6\u9009\u62e9\u6309\u94ae\u3001\u6587\u4ef6\u8def\u5f84\u6587\u672c\u6846\u548c\u53d1\u9001\u6587\u4ef6\u6309\u94ae\u3002 \u00a0 \u00a0– \u663e\u793a\u6587\u4ef6\u4f20\u8f93\u8fdb\u5ea6\u548c\u72b6\u6001\u3002<\/p>\n

4. \u903b\u8f91\u4f18\u5316： \u00a0 \u00a0– \u589e\u52a0\u6d88\u606f\u7c7b\u578b\u533a\u5206（\u6587\u672c\u6d88\u606f\u548c\u6587\u4ef6\u4f20\u8f93）\u3002 \u00a0 \u00a0– \u6539\u8fdb\u5f02\u5e38\u5904\u7406，\u786e\u4fdd\u591a\u5ba2\u6237\u7aef\u548c\u6587\u4ef6\u4f20\u8f93\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n

5. \u6d4b\u8bd5： \u00a0 \u00a0– \u6d4b\u8bd5\u591a\u5ba2\u6237\u7aef\u8fde\u63a5\u548c\u6d88\u606f\u5e7f\u64ad\u3002 \u00a0 \u00a0– \u6d4b\u8bd5\u6587\u4ef6\u4f20\u8f93（\u5c0f\u6587\u4ef6\u548c\u5927\u6587\u4ef6），\u9a8c\u8bc1\u5b8c\u6574\u6027\u548c\u6b63\u786e\u6027\u3002<\/p>\n

\u00a0\u66f4\u65b0\u6e90\u7801 \u4ee5\u4e0b\u662f\u6269\u5c55\u540e\u7684C# WinForms\u7a0b\u5e8f\u6e90\u7801，\u5305\u542b\u591a\u5ba2\u6237\u7aef\u652f\u6301\u548c\u6587\u4ef6\u4f20\u8f93\u529f\u80fd\u3002<\/p>\n

using System;
\nusing System.Collections.Generic;
\nusing System.IO;
\nusing System.Net;
\nusing System.Net.Sockets;
\nusing System.Text;
\nusing System.Threading.Tasks;
\nusing System.Windows.Forms;<\/p>\n

namespace NetworkAssistant
\n{
\n\u00a0 \u00a0 public partial class Form1 : Form
\n\u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 private TcpListener tcpListener;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TcpClient tcpClient;
\n\u00a0 \u00a0 \u00a0 \u00a0 private UdpClient udpClient;
\n\u00a0 \u00a0 \u00a0 \u00a0 private List<TcpClient> tcpClients = new List<TcpClient>();
\n\u00a0 \u00a0 \u00a0 \u00a0 private bool isServerRunning;
\n\u00a0 \u00a0 \u00a0 \u00a0 private bool isClientConnected;
\n\u00a0 \u00a0 \u00a0 \u00a0 private OpenFileDialog openFileDialog;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 public Form1()
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 InitializeComponent();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 openFileDialog = new OpenFileDialog();
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u7a97\u4f53\u521d\u59cb\u5316
\n\u00a0 \u00a0 \u00a0 \u00a0 private void InitializeComponent()
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.comboBoxProtocol = new ComboBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelIP = new Label();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxIP = new TextBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelPort = new Label();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxPort = new TextBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonStartServer = new Button();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonConnectClient = new Button();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxSend = new TextBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSend = new Button();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxReceive = new TextBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonClear = new Button();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSelectFile = new Button();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxFilePath = new TextBox();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSendFile = new Button();<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ comboBoxProtocol
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.comboBoxProtocol.Items.AddRange(new object[] { "TCP", "UDP" });
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.comboBoxProtocol.Location = new System.Drawing.Point(20, 20);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.comboBoxProtocol.Size = new System.Drawing.Size(100, 21);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.comboBoxProtocol.SelectedIndex = 0;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ labelIP
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelIP.Text = "IP Address:";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelIP.Location = new System.Drawing.Point(20, 50);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelIP.Size = new System.Drawing.Size(60, 20);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ textBoxIP
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxIP.Text = "127.0.0.1";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxIP.Location = new System.Drawing.Point(90, 50);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxIP.Size = new System.Drawing.Size(150, 20);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ labelPort
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelPort.Text = "Port:";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelPort.Location = new System.Drawing.Point(20, 80);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.labelPort.Size = new System.Drawing.Size(60, 20);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ textBoxPort
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxPort.Text = "8080";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxPort.Location = new System.Drawing.Point(90, 80);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxPort.Size = new System.Drawing.Size(150, 20);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonStartServer
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonStartServer.Text = "Start Server";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonStartServer.Location = new System.Drawing.Point(20, 110);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonStartServer.Size = new System.Drawing.Size(100, 30);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonStartServer.Click += new EventHandler(this.buttonStartServer_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonConnectClient
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonConnectClient.Text = "Connect Client";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonConnectClient.Location = new System.Drawing.Point(140, 110);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonConnectClient.Size = new System.Drawing.Size(100, 30);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonConnectClient.Click += new EventHandler(this.buttonConnectClient_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ textBoxSend
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxSend.Location = new System.Drawing.Point(20, 150);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxSend.Size = new System.Drawing.Size(300, 50);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxSend.Multiline = true;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonSend
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSend.Text = "Send Text";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSend.Location = new System.Drawing.Point(330, 150);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSend.Size = new System.Drawing.Size(80, 50);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSend.Click += new EventHandler(this.buttonSend_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonSelectFile
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSelectFile.Text = "Select File";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSelectFile.Location = new System.Drawing.Point(20, 210);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSelectFile.Size = new System.Drawing.Size(80, 30);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSelectFile.Click += new EventHandler(this.buttonSelectFile_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ textBoxFilePath
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxFilePath.Location = new System.Drawing.Point(110, 210);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxFilePath.Size = new System.Drawing.Size(210, 20);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxFilePath.ReadOnly = true;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonSendFile
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSendFile.Text = "Send File";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSendFile.Location = new System.Drawing.Point(330, 210);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSendFile.Size = new System.Drawing.Size(80, 30);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonSendFile.Click += new EventHandler(this.buttonSendFile_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ textBoxReceive
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxReceive.Location = new System.Drawing.Point(20, 250);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxReceive.Size = new System.Drawing.Size(390, 150);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxReceive.Multiline = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.textBoxReceive.ReadOnly = true;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ buttonClear
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonClear.Text = "Clear";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonClear.Location = new System.Drawing.Point(20, 410);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonClear.Size = new System.Drawing.Size(80, 30);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.buttonClear.Click += new EventHandler(this.buttonClear_Click);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ Form
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Text = "TCP\/UDP Network Assistant";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Size = new System.Drawing.Size(450, 480);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.comboBoxProtocol);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.labelIP);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.textBoxIP);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.labelPort);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.textBoxPort);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonStartServer);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonConnectClient);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.textBoxSend);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonSend);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonSelectFile);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.textBoxFilePath);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonSendFile);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.textBoxReceive);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 this.Controls.Add(this.buttonClear);
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u542f\u52a8\u670d\u52a1\u5668
\n\u00a0 \u00a0 \u00a0 \u00a0 private async void buttonStartServer_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (isServerRunning)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Server is already running!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string ip = textBoxIP.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int port = int.Parse(textBoxPort.Text);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isServerRunning = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 buttonStartServer.Enabled = false;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (comboBoxProtocol.SelectedItem.ToString() == "TCP")
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await StartTcpServer(ip, port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await StartUdpServer(ip, port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isServerRunning = false;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 buttonStartServer.Enabled = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show($"Error starting server: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ TCP\u670d\u52a1\u5668（\u652f\u6301\u591a\u5ba2\u6237\u7aef）
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task StartTcpServer(string ip, int port)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpListener = new TcpListener(IPAddress.Parse(ip), port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpListener.Start();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText("TCP Server started…");<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (isServerRunning)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 TcpClient client = await tcpListener.AcceptTcpClientAsync();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 lock (tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClients.Add(client);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Client connected. Total clients: {tcpClients.Count}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 _ = HandleTcpClient(client); \/\/ \u5f02\u6b65\u5904\u7406\u5ba2\u6237\u7aef
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Server error: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5904\u7406TCP\u5ba2\u6237\u7aef
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task HandleTcpClient(TcpClient client)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (NetworkStream stream = client.GetStream())
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = new byte[1024];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (isServerRunning)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (bytesRead == 0) break;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u89e3\u6790\u6d88\u606f\u7c7b\u578b
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string message = Encoding.UTF8.GetString(buffer, 0, bytesRead);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (message.StartsWith("FILE:"))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await ReceiveFileTcp(stream, message);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Received: {message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await BroadcastTcpMessage(message, client);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Client error: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 finally
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 lock (tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClients.Remove(client);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 client.Close();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Client disconnected. Total clients: {tcpClients.Count}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u5e7f\u64ad\u6d88\u606f\u7ed9\u6240\u6709TCP\u5ba2\u6237\u7aef
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task BroadcastTcpMessage(string message, TcpClient sender)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = Encoding.UTF8.GetBytes(message);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 lock (tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 foreach (var client in tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (client != sender)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NetworkStream stream = client.GetStream();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 stream.WriteAsync(buffer, 0, buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch { }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ UDP\u670d\u52a1\u5668
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task StartUdpServer(string ip, int port)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 udpClient = new UdpClient(port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText("UDP Server started…");<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (isServerRunning)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 UdpReceiveResult result = await udpClient.ReceiveAsync();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string message = Encoding.UTF8.GetString(result.Buffer);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (message.StartsWith("FILE:"))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await ReceiveFileUdp(result.RemoteEndPoint);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Received from {result.RemoteEndPoint}: {message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Server error: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 break;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u8fde\u63a5\u5ba2\u6237\u7aef
\n\u00a0 \u00a0 \u00a0 \u00a0 private async void buttonConnectClient_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (isClientConnected)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Client is already connected!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string ip = textBoxIP.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int port = int.Parse(textBoxPort.Text);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isClientConnected = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 buttonConnectClient.Enabled = false;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (comboBoxProtocol.SelectedItem.ToString() == "TCP")
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClient = new TcpClient();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await tcpClient.ConnectAsync(ip, port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText("Connected to TCP server.");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 _ = ReceiveTcpClientMessages();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 udpClient = new UdpClient();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText("UDP Client ready.");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isClientConnected = false;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 buttonConnectClient.Enabled = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show($"Error connecting: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u63a5\u6536TCP\u5ba2\u6237\u7aef\u6d88\u606f
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task ReceiveTcpClientMessages()
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (NetworkStream stream = tcpClient.GetStream())
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = new byte[1024];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (isClientConnected)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (bytesRead == 0) break;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string message = Encoding.UTF8.GetString(buffer, 0, bytesRead);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (message.StartsWith("FILE:"))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await ReceiveFileTcp(stream, message);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Received: {message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Client error: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 finally
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isClientConnected = false;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 buttonConnectClient.Enabled = true;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClient?.Close();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText("Disconnected from server.");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u672c\u6d88\u606f
\n\u00a0 \u00a0 \u00a0 \u00a0 private async void buttonSend_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (string.IsNullOrWhiteSpace(textBoxSend.Text))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Please enter a message to send.");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string message = textBoxSend.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = Encoding.UTF8.GetBytes(message);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (comboBoxProtocol.SelectedItem.ToString() == "TCP")
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (isClientConnected && tcpClient != null)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NetworkStream stream = tcpClient.GetStream();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await stream.WriteAsync(buffer, 0, buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Sent: {message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Client not connected!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (udpClient != null)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string ip = textBoxIP.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int port = int.Parse(textBoxPort.Text);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await udpClient.SendAsync(buffer, buffer.Length, ip, port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Sent: {message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("UDP client not initialized!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 textBoxSend.Clear();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show($"Error sending message: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u9009\u62e9\u6587\u4ef6
\n\u00a0 \u00a0 \u00a0 \u00a0 private void buttonSelectFile_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (openFileDialog.ShowDialog() == DialogResult.OK)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 textBoxFilePath.Text = openFileDialog.FileName;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6
\n\u00a0 \u00a0 \u00a0 \u00a0 private async void buttonSendFile_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (string.IsNullOrWhiteSpace(textBoxFilePath.Text) || !File.Exists(textBoxFilePath.Text))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Please select a valid file.");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 return;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string filePath = textBoxFilePath.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string fileName = Path.GetFileName(filePath);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 long fileSize = new FileInfo(filePath).Length;<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (comboBoxProtocol.SelectedItem.ToString() == "TCP")
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (isClientConnected && tcpClient != null)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await SendFileTcp(filePath, fileName, fileSize);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Sent file: {fileName}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("Client not connected!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (udpClient != null)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await SendFileUdp(filePath, fileName, fileSize);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Sent file: {fileName}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show("UDP client not initialized!");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 MessageBox.Show($"Error sending file: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6（TCP）
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task SendFileTcp(string filePath, string fileName, long fileSize)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 NetworkStream stream = tcpClient.GetStream();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6\u5934
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string header = $"FILE:{fileName}:{fileSize}";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] headerBytes = Encoding.UTF8.GetBytes(header);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await stream.WriteAsync(headerBytes, 0, headerBytes.Length);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6\u5185\u5bb9
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = new byte[8192];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int bytesRead;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while ((bytesRead = await fs.ReadAsync(buffer, 0, buffer.Length)) > 0)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await stream.WriteAsync(buffer, 0, bytesRead);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u63a5\u6536\u6587\u4ef6（TCP）
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task ReceiveFileTcp(NetworkStream stream, string header)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string[] parts = header.Split(':');
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string fileName = parts[1];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 long fileSize = long.Parse(parts[2]);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string savePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), fileName);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (FileStream fs = new FileStream(savePath, FileMode.Create, FileAccess.Write))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = new byte[8192];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 long totalBytesRead = 0;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (totalBytesRead < fileSize)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int bytesRead = await stream.ReadAsync(buffer, 0, buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (bytesRead == 0) break;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await fs.WriteAsync(buffer, 0, bytesRead);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 totalBytesRead += bytesRead;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Received file: {fileName}, saved to {savePath}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Error receiving file: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6（UDP）
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task SendFileUdp(string filePath, string fileName, long fileSize)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string ip = textBoxIP.Text;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int port = int.Parse(textBoxPort.Text);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6\u5934
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string header = $"FILE:{fileName}:{fileSize}";
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] headerBytes = Encoding.UTF8.GetBytes(header);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await udpClient.SendAsync(headerBytes, headerBytes.Length, ip, port);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u53d1\u9001\u6587\u4ef6\u5185\u5bb9
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 byte[] buffer = new byte[8192];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 int bytesRead;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while ((bytesRead = await fs.ReadAsync(buffer, 0, buffer.Length)) > 0)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await udpClient.SendAsync(buffer, bytesRead, ip, port);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u63a5\u6536\u6587\u4ef6（UDP）
\n\u00a0 \u00a0 \u00a0 \u00a0 private async Task ReceiveFileUdp(IPEndPoint remoteEndPoint)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 try
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 UdpReceiveResult headerResult = await udpClient.ReceiveAsync();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string header = Encoding.UTF8.GetString(headerResult.Buffer);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string[] parts = header.Split(':');
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string fileName = parts[1];
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 long fileSize = long.Parse(parts[2]);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 string savePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), fileName);<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 using (FileStream fs = new FileStream(savePath, FileMode.Create, FileAccess.Write))
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 long totalBytesRead = 0;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 while (totalBytesRead < fileSize)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 UdpReceiveResult result = await udpClient.ReceiveAsync();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 await fs.WriteAsync(result.Buffer, 0, result.Buffer.Length);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 totalBytesRead += result.Buffer.Length;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Received file: {fileName}, saved to {savePath}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 catch (Exception ex)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 AppendReceiveText($"Error receiving file: {ex.Message}");
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u6e05\u7a7a\u63a5\u6536\u6d88\u606f
\n\u00a0 \u00a0 \u00a0 \u00a0 private void buttonClear_Click(object sender, EventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 textBoxReceive.Clear();
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u8ffd\u52a0\u63a5\u6536\u6d88\u606f\u5230\u6587\u672c\u6846
\n\u00a0 \u00a0 \u00a0 \u00a0 private void AppendReceiveText(string text)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 if (textBoxReceive.InvokeRequired)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 textBoxReceive.Invoke(new Action(() => textBoxReceive.AppendText(text + Environment.NewLine)));
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 else
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 textBoxReceive.AppendText(text + Environment.NewLine);
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \/\/ \u7a97\u4f53\u5173\u95ed\u65f6\u6e05\u7406\u8d44\u6e90
\n\u00a0 \u00a0 \u00a0 \u00a0 protected override void OnFormClosing(FormClosingEventArgs e)
\n\u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isServerRunning = false;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 isClientConnected = false;
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpListener?.Stop();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 lock (tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 foreach (var client in tcpClients)
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 {
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 client.Close();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClients.Clear();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 }
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 tcpClient?.Close();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 udpClient?.Close();
\n\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 base.OnFormClosing(e);
\n\u00a0 \u00a0 \u00a0 \u00a0 }<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 private ComboBox comboBoxProtocol;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Label labelIP;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TextBox textBoxIP;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Label labelPort;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TextBox textBoxPort;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonStartServer;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonConnectClient;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TextBox textBoxSend;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonSend;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TextBox textBoxReceive;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonClear;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonSelectFile;
\n\u00a0 \u00a0 \u00a0 \u00a0 private TextBox textBoxFilePath;
\n\u00a0 \u00a0 \u00a0 \u00a0 private Button buttonSendFile;
\n\u00a0 \u00a0 }
\n} <\/p>\n

\u00a0\u4f7f\u7528\u8bf4\u660e 1. \u8fd0\u884c\u7a0b\u5e8f： \u00a0 \u00a0– \u5728Visual Studio\u4e2d\u521b\u5efa\u65b0WinForms\u9879\u76ee，\u66ff\u6362`Form1.cs`\u4e3a\u4e0a\u8ff0\u4ee3\u7801\u3002 \u00a0 \u00a0– \u7f16\u8bd1\u5e76\u8fd0\u884c\u3002<\/p>\n

2. \u64cd\u4f5c\u6b65\u9aa4： \u00a0 \u00a0– \u9009\u62e9\u534f\u8bae：\u9009\u62e9`TCP`\u6216`UDP`\u3002 \u00a0 \u00a0– \u8f93\u5165IP\u548c\u7aef\u53e3：\u9ed8\u8ba4`127.0.0.1:8080`，\u53ef\u4fee\u6539\u3002 \u00a0 \u00a0– \u542f\u52a8\u670d\u52a1\u5668：\u70b9\u51fb\u201cStart Server\u201d，TCP\u6a21\u5f0f\u652f\u6301\u591a\u5ba2\u6237\u7aef\u8fde\u63a5\u3002 \u00a0 \u00a0– \u8fde\u63a5\u5ba2\u6237\u7aef：\u5728\u591a\u4e2a\u5b9e\u4f8b\u4e2d\u70b9\u51fb\u201cConnect Client\u201d（TCP\u9700\u8981\u8fde\u63a5，UDP\u76f4\u63a5\u53d1\u9001）\u3002 \u00a0 \u00a0– \u53d1\u9001\u6587\u672c：\u8f93\u5165\u6587\u672c，\u70b9\u51fb\u201cSend Text\u201d，TCP\u5e7f\u64ad\u7ed9\u6240\u6709\u5ba2\u6237\u7aef，UDP\u53d1\u9001\u5230\u6307\u5b9aIP\u3002 \u00a0 \u00a0– \u53d1\u9001\u6587\u4ef6：\u70b9\u51fb\u201cSelect File\u201d\u9009\u62e9\u6587\u4ef6，\u70b9\u51fb\u201cSend File\u201d\u4f20\u8f93，\u6587\u4ef6\u4fdd\u5b58\u5230\u63a5\u6536\u7aef\u684c\u9762\u3002 \u00a0 \u00a0– \u67e5\u770b\u6d88\u606f：\u6587\u672c\u548c\u6587\u4ef6\u4f20\u8f93\u72b6\u6001\u663e\u793a\u5728\u63a5\u6536\u6587\u672c\u6846，\u70b9\u51fb\u201cClear\u201d\u6e05\u7a7a\u3002<\/p>\n

3. \u6ce8\u610f\u4e8b\u9879： \u00a0 \u00a0– TCP\u591a\u5ba2\u6237\u7aef：\u670d\u52a1\u5668\u7ef4\u62a4\u6240\u6709\u5ba2\u6237\u7aef\u8fde\u63a5，\u6d88\u606f\u5e7f\u64ad\u7ed9\u5176\u4ed6\u5ba2\u6237\u7aef，\u65ad\u5f00\u8fde\u63a5\u81ea\u52a8\u6e05\u7406\u3002 \u00a0 \u00a0– \u6587\u4ef6\u4f20\u8f93：\u6587\u4ef6\u4fdd\u5b58\u5230\u684c\u9762，UDP\u4f20\u8f93\u53ef\u80fd\u56e0\u4e22\u5305\u5bfc\u81f4\u4e0d\u5b8c\u6574，\u5efa\u8bae\u5927\u6587\u4ef6\u4f7f\u7528TCP\u3002 \u00a0 \u00a0– \u7aef\u53e3\u5360\u7528：\u786e\u4fdd\u7aef\u53e3\u672a\u88ab\u5360\u7528，\u5f02\u5e38\u60c5\u51b5\u4f1a\u663e\u793a\u63d0\u793a\u3002<\/p>\n

\u00a0\u6d4b\u8bd5\u5efa\u8bae – \u591a\u5ba2\u6237\u7aef\u6d4b\u8bd5： \u00a0 \u00a0– \u542f\u52a8\u4e00\u4e2a\u670d\u52a1\u5668（TCP\u6a21\u5f0f），\u8fd0\u884c\u591a\u4e2a\u5ba2\u6237\u7aef\u5b9e\u4f8b\u8fde\u63a5，\u53d1\u9001\u6587\u672c\u6d88\u606f，\u9a8c\u8bc1\u5e7f\u64ad\u529f\u80fd\u3002 \u00a0 \u00a0– \u65ad\u5f00\u4e00\u4e2a\u5ba2\u6237\u7aef，\u68c0\u67e5\u670d\u52a1\u5668\u662f\u5426\u6b63\u786e\u6e05\u7406\u5e76\u66f4\u65b0\u5ba2\u6237\u7aef\u8ba1\u6570\u3002 – \u6587\u4ef6\u4f20\u8f93\u6d4b\u8bd5： \u00a0 \u00a0– \u6d4b\u8bd5\u5c0f\u6587\u4ef6（\u5982\u6587\u672c\u6587\u4ef6）\u548c\u5927\u6587\u4ef6（\u5982\u56fe\u7247\u6216\u89c6\u9891），\u9a8c\u8bc1\u6587\u4ef6\u5b8c\u6574\u6027\u3002 \u00a0 \u00a0– \u5728TCP\u548cUDP\u6a21\u5f0f\u4e0b\u5206\u522b\u6d4b\u8bd5，\u6bd4\u8f83\u53ef\u9760\u6027（TCP\u66f4\u7a33\u5b9a）\u3002 – \u7f51\u7edc\u6d4b\u8bd5： \u00a0 \u00a0– \u5728\u4e0d\u540c\u673a\u5668\u4e0a\u8fd0\u884c，\u4fee\u6539IP\u4e3a\u76ee\u6807\u670d\u52a1\u5668IP，\u6d4b\u8bd5\u8de8\u8bbe\u5907\u901a\u4fe1\u3002 – \u5f02\u5e38\u6d4b\u8bd5： \u00a0 \u00a0– \u6a21\u62df\u7f51\u7edc\u4e2d\u65ad\u6216\u7aef\u53e3\u5360\u7528，\u9a8c\u8bc1\u9519\u8bef\u63d0\u793a\u548c\u7a0b\u5e8f\u7a33\u5b9a\u6027\u3002<\/p>\n

\u00a0\u6269\u5c55\u8bf4\u660e – \u591a\u5ba2\u6237\u7aef：TCP\u670d\u52a1\u5668\u4f7f\u7528`List<TcpClient>`\u7ba1\u7406\u5ba2\u6237\u7aef，\u7ebf\u7a0b\u5b89\u5168\u5730\u6dfb\u52a0\u548c\u79fb\u9664\u5ba2\u6237\u7aef，\u652f\u6301\u6d88\u606f\u5e7f\u64ad\u3002 – \u6587\u4ef6\u4f20\u8f93：\u901a\u8fc7\u53d1\u9001\u6587\u4ef6\u5934（\u6587\u4ef6\u540d\u548c\u5927\u5c0f）\u5b9e\u73b0\u53ef\u9760\u4f20\u8f93，TCP\u4f7f\u7528\u6d41\u4f20\u8f93，UDP\u5206\u5757\u53d1\u9001（\u53ef\u80fd\u4e22\u5305）\u3002 – \u5c40\u9650\u6027： \u00a0 \u00a0– UDP\u6587\u4ef6\u4f20\u8f93\u672a\u5b9e\u73b0\u91cd\u4f20\u673a\u5236，\u5927\u6587\u4ef6\u53ef\u80fd\u4e0d\u5b8c\u6574\u3002 \u00a0 \u00a0– \u672a\u6dfb\u52a0\u8fdb\u5ea6\u6761\u663e\u793a\u6587\u4ef6\u4f20\u8f93\u8fdb\u5ea6\u3002 – \u8fdb\u4e00\u6b65\u6539\u8fdb： \u00a0 \u00a0– \u6dfb\u52a0\u6587\u4ef6\u4f20\u8f93\u8fdb\u5ea6\u6761\u3002 \u00a0 \u00a0– \u5b9e\u73b0UDP\u91cd\u4f20\u673a\u5236\u3002 \u00a0 \u00a0– \u652f\u6301\u6587\u4ef6\u5939\u4f20\u8f93\u6216\u52a0\u5bc6\u4f20\u8f93\u3002<\/p>\n

\u8fd9\u4e2a\u7248\u672c\u7684\u7f51\u7edc\u5c0f\u52a9\u624b\u5df2\u652f\u6301\u591a\u5ba2\u6237\u7aef\u548c\u6587\u4ef6\u4f20\u8f93，\u9002\u5408\u5b66\u4e60\u548c\u6d4b\u8bd5\u7f51\u7edc\u901a\u4fe1\u3002\u5982\u9700\u7279\u5b9a\u529f\u80fd\u6269\u5c55，\u8bf7\u8054\u7cfb\u6211252439060<\/p>\n","protected":false},"excerpt":{"rendered":"

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