Minimum height and width to maui page

Question

Hi, I have login and main page. How do i set Minimum height and width to these pages ? Thanks in advance,

Answer 1

Hello,

For .Net7:
Page has a content property of the Window class, Window defines the MinimumHeight and MinimumWidth properties, so you can set them in your Page like the following code:

       public partial class LoginPage: ContentPage
{
   public LoginPage()
    {
        InitializeComponent();
    }
    protected override void OnAppearing()
    {
        base.OnAppearing();
        this.Window.MinimumHeight = 300;
        this.Window.MinimumWidth = 600;
    }
}

Then you can drag the page to check whether the page can only be dragged to a minimum width of 300（and miniumu Height of 600）

For .Net6: The Window doesn't have MinimumHeight and MinimumWidth properties, you can try to find the native WinUI Window(AppWindow.Changed event) and set new size when the window size is smaller than the mini size. Please refer to the following code:

#if WINDOWS
using Microsoft.UI;
using Microsoft.UI.Windowing;
using Windows.Graphics;
using Windows.UI.WindowManagement;
#endif


protected override void OnAppearing()
    {// in MainPage or LoginPage
        base.OnAppearing();
#if WINDOWS
        var nativeWindow = this.Window.Handler.PlatformView;
        IntPtr windowHandle = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);
        WindowId windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(windowHandle);
        Microsoft.UI.Windowing.AppWindow appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);
        appWindow.Changed += AppWindow_Changed;
#endif
    }



   private static void AppWindow_Changed(Microsoft.UI.Windowing.AppWindow sender, Microsoft.UI.Windowing.AppWindowChangedEventArgs args)
    {
        var miniWidth = 300;
        var miniHeight = 300;// set different value in  MainPage or in LoginPage
       var oldWindowHeight = sender.Size.Height;
        var oldWindowWidth = sender.Size.Width;
        var newWindowHieght = oldWindowHeight > miniHeight ? oldWindowHeight : miniHeight;
        var newWindowWidth = oldWindowWidth > miniWidth ? oldWindowWidth : miniWidth;
        sender.Resize(new SizeInt32(newWindowWidth, newWindowHieght));
    }

Best Regards,

Wenyan Zhang

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