C#常规TcpListener

1.Xaml

 <Window x:Class="Server.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:Server"
         mc:Ignorable="d"
         xmlns:md="http://materialdesigninxaml.net/winfx/xaml/themes"
         WindowStartupLocation="CenterScreen" ResizeMode="NoResize"
         Loaded="MainWindow_OnLoaded"
         Title="Server" Height="450" Width="600">
     <Grid>
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width="Auto"/>
             <ColumnDefinition Width="1*"/>
         </Grid.ColumnDefinitions>
         <TreeView x:Name="tvRemotes">
         </TreeView>
         <Grid Grid.Column="1">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto"/>
                 <RowDefinition Height="Auto"/>
                 <RowDefinition Height="Auto"/>
                 <RowDefinition Height="1*"/>
             </Grid.RowDefinitions>
             <Grid.ColumnDefinitions>
                 <ColumnDefinition />
                 <ColumnDefinition Width="Auto"/>
             </Grid.ColumnDefinitions>
             <TextBlock HorizontalAlignment="Right" Margin="5,0,2,0" Padding="5" Text="本地地址"/>
             <TextBox x:Name="tbIP" IsReadOnly="True" Grid.Row="0" Grid.Column="1" Margin="5" Text="127.0.0.1" />
             <TextBlock HorizontalAlignment="Right" Margin="5,0,2,0" Padding="5" Grid.Row="1" Grid.Column="0" Text="本地端口:"/>
             <TextBox x:Name="tbPort" Grid.Row="1" Grid.Column="1" Margin="5"/>
             <StackPanel Grid.Row="2" Grid.Column="1" Orientation="Horizontal">
                 <Button x:Name="btnListen" Content="开始监听" Margin="15" Click="BtnListen_OnClick"/>
                 <Button x:Name="btnDisconnect" Content="断开连接" IsEnabled="False" Margin="15" Click="BtnDisconnect_OnClick"/>
             </StackPanel>
             <ListView x:Name="lvDebugs" Grid.Row="3" Grid.ColumnSpan="2" Grid.Column="0" AlternationCount="2">
                 <ListView.ItemContainerStyle>
                     <Style TargetType="ListViewItem">
                         <Style.Triggers>
                             <Trigger Property="ListView.AlternationIndex" Value="0">
                                 <Setter Property="Background" Value="White"/>
                             </Trigger>
                             <Trigger Property="ListView.AlternationIndex" Value="1">
                                 <Setter Property="Background" Value="WhiteSmoke"/>
                             </Trigger>
                         </Style.Triggers>
                     </Style>
                 </ListView.ItemContainerStyle>
             </ListView>
         </Grid>
     </Grid>
 </Window>

2.CSharp

 using MaterialDesignThemes.Wpf;
 using System;
 using System.Collections.Generic;
 using System.Net;
 using System.Net.Sockets;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Threading;

 namespace Server
 {
     /// <summary>
     /// MainWindow.xaml 的交互逻辑
     /// </summary>
     public partial class MainWindow : Window
     {
         private TcpListener listener = null;
         private List<Socket> socketList = new List<Socket>();

         public class StateObject
         {
             public Socket workSocket = null;
             public const int BUFFER_SIZE = ;
             public byte[] buffer = new byte[BUFFER_SIZE];
         }

         public MainWindow()
         {
             InitializeComponent();
         }

         private void MainWindow_OnLoaded(object sender, RoutedEventArgs e)
         {

         }

         /// <summary>
         /// 开启监听
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void BtnListen_OnClick(object sender, RoutedEventArgs e)
         {
             try
             {
                 listener = new TcpListener(new IPEndPoint(IPAddress.Any, Convert.ToInt32(tbPort.Text)));
                 listener.Start();
                 listener.BeginAcceptSocket(new AsyncCallback(AcceptCallback), listener.Server);

                 btnListen.IsEnabled = false;
                 btnDisconnect.IsEnabled = true;
             }
             catch (Exception ex)
             {
                 Add2ListView("启动监听异常: " + ex.Message);
             }
         }

         private void AcceptCallback(IAsyncResult ar)
         {
             Socket server = (Socket) ar.AsyncState;
             try
             {
                 Socket socket = server.EndAccept(ar);
                 string strAddr = socket.RemoteEndPoint.ToString();
                 socketList.Add(socket);
                 Dispatcher.Invoke(() =>
                 {
                     Add2TreeView(strAddr);
                     Add2ListView(strAddr);
                 }, DispatcherPriority.Normal);
                 var bytes = Encoding.UTF8.GetBytes("welcome.");
                 socket.Send(bytes);
                 StateObject so = new StateObject();
                 so.workSocket = socket;
                 socket.BeginReceive(so.buffer, , StateObject.BUFFER_SIZE, SocketFlags.None,
                     new AsyncCallback(ReceiveCallback), so);

                 server.BeginAccept(new AsyncCallback(AcceptCallback), server);
             }
             catch (Exception)
             {
                 // ignored
             }
         }

         /// <summary>
         /// 断开监听
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private async void BtnDisconnect_OnClick(object sender, RoutedEventArgs e)
         {
             try
             {
                 foreach (var socket in socketList)
                 {
                     if (socket != null && socket.Connected)
                     {
                         socket.Shutdown(SocketShutdown.Both);

                         await Task.Delay();
                         socket.Close();
                     }
                 }
                 socketList.Clear();

                 listener.Stop();
                 // 清空客户端列表
                 tvRemotes.Items.Clear();

                 btnListen.IsEnabled = true;
                 btnDisconnect.IsEnabled = false;
             }
             catch (Exception ex)
             {
                 Add2ListView("断开监听异常: " + ex.Message);
             }
         }

         private void ReceiveCallback(IAsyncResult ar)
         {
             StateObject so = ar.AsyncState as StateObject;
             Socket socket = so.workSocket;
             if (socket != null && socket.Connected)
             {
                 int read = socket.EndReceive(ar);
                 ar.AsyncWaitHandle.Close();
                 if (read > )
                 {
                     Dispatcher.Invoke(() => Add2ListView(text: socket.RemoteEndPoint + ": " + Encoding.UTF8.GetString(so.buffer)),
                         DispatcherPriority.Normal);
                     socket.BeginReceive(so.buffer, , StateObject.BUFFER_SIZE, SocketFlags.None,
                         new AsyncCallback(ReceiveCallback), so);
                 }
                 else
                 {
                     Dispatcher.Invoke(() =>
                         {
                             Add2ListView(socket.RemoteEndPoint + ": 客户端连接已断开.");
                             for (int i = ; i < tvRemotes.Items.Count; i++)
                             {
                                 TreeViewItem tvi = (TreeViewItem)tvRemotes.Items[i];
                                 if ((string)tvi.Tag == socket.RemoteEndPoint.ToString())
                                 {
                                     tvRemotes.Items.Remove(tvi);
                                     socketList.Remove(socket);
                                     return;
                                 }
                             }
                         },
                         DispatcherPriority.Normal);

                     socket.Shutdown(SocketShutdown.Both);
                     socket.Close();
                 }
             }
         }

         private void Add2TreeView(string strRemote)
         {
             TreeViewItem tvi = new TreeViewItem();
             tvi.Tag = strRemote;
             StackPanel sp = new StackPanel();
             sp.Orientation = Orientation.Horizontal;
             sp.Children.Add(new PackIcon { Kind = PackIconKind.Devices });
             sp.Children.Add(new TextBlock { Text = $"{strRemote}" });
             tvi.Items.Add(sp);
             tvRemotes.Items.Add(tvi);
         }

         private void Add2ListView(string text)
         {
             TextBlock tb = new TextBlock { Text = text };
             lvDebugs.Items.Add(tb);
         }
     }
 }

3.运行效果

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