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我刚开始学习WinUI 3.0 ,在谷歌或Learn WinUI 3.0如何设置应用程序的默认窗口大小等书籍中找不到任何信息。我知道在 UWP 中它可以像

ApplicationView.PreferredLaunchViewSize = new Size(480, 800);
ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.PreferredLaunchViewSize;

但实际上它在 WinUI 中不起作用

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4 回答 4

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看看这个存储库dotMorten/WinUIEx

它包含一个设置窗口大小和位置的方法

myWindow.SetWindowPositionAndSize(100, 100, 1024, 768);

我还在WinUI3 Samples中找到了一个示例, 我在此处添加相关代码以方便参考

private void SetWindowSize(IntPtr hwnd, int width, int height)
{
    var dpi = PInvoke.User32.GetDpiForWindow(hwnd);
    float scalingFactor = (float)dpi / 96;
    width = (int)(width * scalingFactor);
    height = (int)(height * scalingFactor);

    PInvoke.User32.SetWindowPos(hwnd, PInvoke.User32.SpecialWindowHandles.HWND_TOP,
                                0, 0, width, height,
                                PInvoke.User32.SetWindowPosFlags.SWP_NOMOVE);
}
于 2021-09-29T10:17:09.830 回答
2

无需您自己进行这些互操作调用,也无需为此使用第三方包。

试试这个三连击:

// Use 'this' rather than 'window' as variable if this is about the current window.
IntPtr hWnd = WinRT.Interop.WindowNative.GetWindowHandle(window);
var windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(hWnd);
var appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);

然后你最终可以设置大小:

appWindow.Resize(new Windows.Graphics.SizeInt32 { Width = 480, Height = 800 });

请注意,AppWindow对象还具有其他几个功能,例如 MoveAndResizeShowHide和修改标题栏的功能。

于 2022-01-19T22:24:39.560 回答
0

这行得通。您将需要添加 nuget 包 PInvoke.User32。

protected override void OnLaunched(Microsoft.UI.Xaml.LaunchActivatedEventArgs args)
{
    m_window = new MainWindow();
    m_window.Activate();

    //Get the Window's HWND
    var windowNative = m_window.As<IWindowNative>();
    m_windowHandle = windowNative.WindowHandle;

    m_window.Activate();

    SetWindowBounds(0,0,100,100);
}

private Window m_window;
private IntPtr m_windowHandle;
public IntPtr WindowHandle { get { return m_windowHandle; } }

[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("EECDBF0E-BAE9-4CB6-A68E-9598E1CB57BB")]
internal interface IWindowNative
{
    IntPtr WindowHandle { get; }
}


public void SetWindowBounds(int x, int y, int width, int height)
{
    var dpi = PInvoke.User32.GetDpiForWindow(m_windowHandle);
    float scalingFactor = (float)dpi / 96;
    width = (int)(width * scalingFactor);
    height = (int)(height * scalingFactor);

    PInvoke.User32.SetWindowPos(m_windowHandle, PInvoke.User32.SpecialWindowHandles.HWND_TOP,
                                x, y, width, height,
                                PInvoke.User32.SetWindowPosFlags.SWP_NOMOVE);
}
于 2021-12-13T21:02:28.343 回答
0

我还不能评论答案,但要添加到 Jonas 的答案中,您可以将他的答案放在主窗口代码隐藏的类构造函数(this.InitializeComponent() 所在的位置)或 App.cs 的 OnLaunched 方法中. 我敢肯定这对很多人来说似乎很明显,但对于那些来自其他语言/平台的人来说可能不是。例子:

    public MainWindow()
    {
        this.InitializeComponent();
        
        IntPtr hWnd = WinRT.Interop.WindowNative.GetWindowHandle(this); // m_window in App.cs
        WindowId windowId = Win32Interop.GetWindowIdFromWindow(hWnd);
        AppWindow appWindow = AppWindow.GetFromWindowId(windowId);

        var size = new Windows.Graphics.SizeInt32();
        size.Width = 480;
        size.Height = 800;

        appWindow.Resize(size);
    // or like Jonas said:
    // appWindow.Resize(new Windows.Graphics.SizeInt32 { Width = 480, Height = 800 });
    }
于 2022-02-11T01:44:26.137 回答