使用 Windows Forms 自带的 System.Windows.Forms.Screen 类可以从一个窗口句柄获取到对应的屏幕。随后可以使用此 Screen 类获取各种屏幕信息。
System.Windows.Forms.Screen
通过句柄获取屏幕类：
1 | System.Windows.Forms.Screen.FromHandle(hWnd) |
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这里我做了一个 DEMO 程序，画出了窗口的位置和大小，以及当前窗口所在的屏幕的位置和大小。
附代码
MainWindow.xaml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | <Window x:Class="Walterlv.Issues.Dpi.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:Walterlv.Issues.Dpi" mc:Ignorable="d" Title="欢迎阅读吕毅的博客 blog.walterlv.com" Height="450" Width="800"> <Grid x:Name="RootPanel"> <Canvas SnapsToDevicePixels="True"> <UIElement.RenderTransform> <ScaleTransform ScaleX="0.2" ScaleY="0.2" /> </UIElement.RenderTransform> <Border x:Name="ScreenBorder" Background="#E4E4E6"> <UIElement.RenderTransform> <TranslateTransform x:Name="ScreenTranslateTransform" /> </UIElement.RenderTransform> <TextBlock x:Name="ScreenTextBlock" FontSize="240" TextAlignment="Right" /> </Border> <Border x:Name="WindowBorder" Background="#949499"> <UIElement.RenderTransform> <TranslateTransform x:Name="WindowTranslateTransform" /> </UIElement.RenderTransform> <TextBlock x:Name="WindowTextBlock" FontSize="240" Margin="0 0 -1000 -1000" /> </Border> </Canvas> </Grid> </Window> |
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MainWindow.xaml.cs
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Interop; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; namespace Walterlv.Issues.Dpi { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); LocationChanged = MainWindow_LocationChanged; SizeChanged = MainWindow_SizeChanged; } private void MainWindow_LocationChanged(object sender, EventArgs e) { UpdateScreenInfo(this); } private void MainWindow_SizeChanged(object sender, SizeChangedEventArgs e) { UpdateScreenInfo(this); } private void UpdateScreenInfo(Window window) { var hwndSource = (HwndSource)PresentationSource.FromVisual(window); if (hwndSource is null) { return; } var hWnd = hwndSource.Handle; var screen = System.Windows.Forms.Screen.FromHandle(hWnd).Bounds; if (User32.GetWindowRect(hWnd, out var rect)) { ScreenTranslateTransform.X = screen.X; ScreenTranslateTransform.Y = screen.Y; ScreenBorder.Width = screen.Width; ScreenBorder.Height = screen.Height; ScreenTextBlock.Text = $@"{rect.left},{rect.top} {screen.Width}×{screen.Height}"; WindowTranslateTransform.X = rect.left; WindowTranslateTransform.Y = rect.top; WindowBorder.Width = rect.right - rect.left; WindowBorder.Height = rect.bottom - rect.top; WindowTextBlock.Text = $@"{rect.left},{rect.top} {rect.right - rect.left}×{rect.bottom - rect.top}"; } } } } |
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本文会经常更新，请阅读原文： https://blog.walterlv.com/post/detect-screen-that-contains-the-wpf-window.html ，以避免陈旧错误知识的误导，同时有更好的阅读体验。
本作品采用 知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议 进行许可。欢迎转载、使用、重新发布，但务必保留文章署名 吕毅 （包含链接： https://blog.walterlv.com ），不得用于商业目的，基于本文修改后的作品务必以相同的许可发布。如有任何疑问，请 与我联系 ([email protected]) 。
