WPF中多个线程实现多个窗口(每个线程对应一个窗口)和单个线程实现多个窗口区别

示例代码如下：

<Window x:Class="SDKSamples.MultiWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Thread Hosted Window" Width="360" Height="180" SizeToContent="Height" ResizeMode="NoResize" Loaded="Window_Loaded">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <TextBlock HorizontalAlignment="Right" Margin="30,0" Text="‼️" FontSize="50" FontWeight="ExtraBold"
                   Foreground="Magenta" RenderTransformOrigin="0.5,0.5" Name="RotatedTextBlock">
            <TextBlock.RenderTransform>
                <RotateTransform Angle="0" />
            </TextBlock.RenderTransform>
            <TextBlock.Triggers>
                <EventTrigger RoutedEvent="Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Storyboard.TargetName="RotatedTextBlock"
                                Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)"
                                From="0" To="360" Duration="0:0:5" RepeatBehavior="Forever" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </TextBlock.Triggers>
        </TextBlock>

        <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="20" >
            <Button Content="Pause" Click="PauseButton_Click" Margin="5,0" Padding="10,0" />
            <TextBlock Margin="5,0,0,0" Text="<-- Pause for 5 seconds" />
        </StackPanel>

        <StackPanel Grid.Row="1" Margin="10">
            <Button Content="Create 'Same Thread' Window" Click="SameThreadWindow_Click" />
            <Button Content="Create 'New Thread' Window" Click="NewThreadWindow_Click" Margin="0,10,0,0" />
        </StackPanel>

        <StatusBar Grid.Row="2" VerticalAlignment="Bottom">
            <StatusBarItem Content="Thread ID" Name="ThreadStatusItem" />
        </StatusBar>

    </Grid>
</Window>

　　

using System;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;

namespace SDKSamples
{
    public partial class MultiWindow : Window
    {
        public MultiWindow() =>
            InitializeComponent();

        private void Window_Loaded(object sender, RoutedEventArgs e) =>
            ThreadStatusItem.Content = $"Thread ID: {Thread.CurrentThread.ManagedThreadId}";

        private void PauseButton_Click(object sender, RoutedEventArgs e) =>
            Task.Delay(TimeSpan.FromSeconds(5)).Wait();

        private void SameThreadWindow_Click(object sender, RoutedEventArgs e) =>
            new MultiWindow().Show();

        private void NewThreadWindow_Click(object sender, RoutedEventArgs e)
        {
            Thread newWindowThread = new Thread(ThreadStartingPoint);
            newWindowThread.SetApartmentState(ApartmentState.STA);
            newWindowThread.IsBackground = true;
            newWindowThread.Start();
        }

        private void ThreadStartingPoint()
        {
            new MultiWindow().Show();

            System.Windows.Threading.Dispatcher.Run();
        }
    }
}

SameThreadWindow_Click和NewThreadWindow_Click两个方法核心区别在于新窗口是在哪个线程上创建和运行的，这直接决定了新窗口的独立性和响应能力。

简单来说：
SameThreadWindow_Click：新窗口和主窗口在同一条跑道（UI线程）上跑，一荣俱荣，一损俱损。
NewThreadWindow_Click：新窗口在自己的专属跑道（新线程）上跑，独立运行，互不干扰。