[英]How can i set my WinUI3 program to be started in the center of the screen?
I am currently developing a WinUI3 app, I want to my program starts in the center of the screen.我目前正在开发一个 WinUI3 应用程序,我希望我的程序在屏幕中央启动。 How can i make this happen?
我怎样才能做到这一点?
i tried我试过
m_window = new MainWindow();
var hWnd = WinRT.Interop.WindowNative.GetWindowHandle(m_window);
Microsoft.UI.WindowId windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(hWnd);
Microsoft.UI.Windowing.AppWindow appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);
if (appWindow is not null)
{
Microsoft.UI.Windowing.DisplayArea displayArea = Microsoft.UI.Windowing.DisplayArea.GetFromWindowId(windowId, Microsoft.UI.Windowing.DisplayAreaFallback.Nearest);
if (displayArea is not null)
{
var CenteredPosition = appWindow.Position;
CenteredPosition.X = ((displayArea.WorkArea.Width - appWindow.Size.Width) / 2);
CenteredPosition.Y = ((displayArea.WorkArea.Height - appWindow.Size.Height) / 2);
appWindow.Move(CenteredPosition);
}
}
m_window.Activate();
But it didn't work但它没有用
Based on Simon's comment I confirmed that this works:根据西蒙的评论,我确认这有效:
using Microsoft.UI;
using Microsoft.UI.Windowing;
using Microsoft.UI.Xaml;
using System;
using Windows.Graphics;
using WinRT.Interop;
namespace WinUISamples;
public sealed partial class MainWindow : Window
{
private bool centered;
public MainWindow()
{
this.InitializeComponent();
this.Activated += MainWindow_Activated;
}
private void MainWindow_Activated(object sender, WindowActivatedEventArgs args)
{
if (this.centered is false)
{
Center(this);
centered = true;
}
}
private static void Center(Window window)
{
IntPtr hWnd = WindowNative.GetWindowHandle(window);
WindowId windowId = Win32Interop.GetWindowIdFromWindow(hWnd);
if (AppWindow.GetFromWindowId(windowId) is AppWindow appWindow &&
DisplayArea.GetFromWindowId(windowId, DisplayAreaFallback.Nearest) is DisplayArea displayArea)
{
PointInt32 CenteredPosition = appWindow.Position;
CenteredPosition.X = (displayArea.WorkArea.Width - appWindow.Size.Width) / 2;
CenteredPosition.Y = (displayArea.WorkArea.Height - appWindow.Size.Height) / 2;
appWindow.Move(CenteredPosition);
}
}
}
You also you can just use the WinUIEx NuGet package.您也可以只使用WinUIEx NuGet 包。
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