在.Net Framework平台下WPF实现SignalR客户端

1、新建.Net Framework平台下WPF应用程序

Nuget包安装 Microsoft.AspNetCore.SignalR.Client

<Window x:Class="WpfFramework.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:WpfFramework"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="40"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="50"/>
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal"
                    VerticalAlignment="Center">
            <Label Content="地址"/>
            <TextBox x:Name="txtUrl"
                     Width="300"/>
            <Button x:Name="connectBtn"
                    Height="35"
                    Width="100"
                    Content="连接"
                    Click="connectBtn_Click"/>
        </StackPanel>
        <Grid Grid.Row="1">
            <ListView Name="msgList">
                
            </ListView>
        </Grid>
        <StackPanel Orientation="Horizontal"
                    Grid.Row="2"
                    VerticalAlignment="Center">
            <TextBox Height="30"
                     Width="300"
                     Name="txtSend">
                
            </TextBox>
            <Button Content="发送"
                    Name="SendBtn"
                    Width="100"
                    Click="SendBtn_Click"></Button>
        </StackPanel>
    </Grid>
</Window>

  public partial class MainWindow : Window
    {
        private HubConnection _connection;
        public MainWindow()
        {
            InitializeComponent();
            txtUrl.Text = @"http://127.0.0.1:5000/myTestHub";
        }

        private async void connectBtn_Click(object sender, RoutedEventArgs e)
        {
            _connection = new HubConnectionBuilder()
              .WithUrl(txtUrl.Text)
              .Build();

            _connection.On<string, string>("myMessage", (s1, s2) => OnSend(s1, s2));
            _connection.Closed += _connection_Closed;
            await _connection.StartAsync();
            connectBtn.IsEnabled = false;
        }

        private Task _connection_Closed(Exception arg)
        {
            return Task.Run(() =>
            {
                Dispatcher.BeginInvoke(new Action(() =>

                {
                    connectBtn.IsEnabled = true;
                }
                 ));
            });

        }

        private void OnSend(string name, string message)
        {
            msgList.Items.Add("用户名称：" + name+ "     消息内容：" + message);
        }

        private async void SendBtn_Click(object sender, RoutedEventArgs e)
        {
            await _connection.InvokeAsync("Send", "WPFApp", txtSend.Text);
        }
    }

2、服务端还是调用之前文章中的SignalR服务端