如何在WinUI 3中更改ProgressBarTrackHeight高度？

GitHub 存储库中存在有关此问题的问题。

作为解决方法，在问题得到解决之前，您可以创建一个自定义：ProgressBar

public class CustomProgressBar : ProgressBar
{
    private long _heightPropertyChangedCallBackToken;

    public CustomProgressBar() : base()
    {
        Loaded += OnLoaded;
        Unloaded += OnUnloaded;
    }

    private void OnLoaded(object sender, RoutedEventArgs e)
    {
        _heightPropertyChangedCallBackToken = RegisterPropertyChangedCallback(HeightProperty, OnHeightPropertyChanged);
        ApplyHeight();
    }

    private void OnUnloaded(object sender, RoutedEventArgs e)
    {
        UnregisterPropertyChangedCallback(HeightProperty, _heightPropertyChangedCallBackToken);
    }

    private void ApplyHeight()
    {
        foreach (FrameworkElement element in this.FindDescendants()
            .OfType<FrameworkElement>()
            .Where(x => x is Grid or Rectangle))
        {
            element.Height = Height;
        }
    }

    private void OnHeightPropertyChanged(DependencyObject sender, DependencyProperty dp)
    {
        ApplyHeight();
    }
}

现在该属性应该可以正常工作：Height

<local:CustomProgressBar
    Height="50"
    Width="130"
    Value="30" />

请注意，它来自 CommunityToolkit.WinUI.Extensions NuGet 包。FindDescendants

更新

在 GitHub 存储库中，对于不会动态更改的情况，建议了一个更好的选项。您只需要设置 ：HeightProgressBarMinHeight

<Grid>
    <Grid.Resources>
        <x:Double x:Key="ProgressBarTrackHeight">50</x:Double>
    </Grid.Resources>
    <ProgressBar
        MinHeight="{StaticResource ProgressBarTrackHeight}"
        Maximum="100"
        Value="70" />
</Grid>