使用xamarin.forms的WPF应用程序的圆角图像

using System.Windows;
using System.Windows.Media;
using Xamarin.Forms.Platform.WPF;

namespace YourNamespace
{
    public class RoundedImageRenderer : ImageRenderer
    {
        protected override void OnDraw(DrawingContext drawingContext)
        {
            var roundedRect = new System.Windows.Rect(0, 0, Element.Width, Element.Height);
            var cornerRadius = 10; // 圆角半径，可以根据需要进行调整

            drawingContext.PushClip(new System.Windows.Media.RectangleGeometry(roundedRect, cornerRadius, cornerRadius));
            base.OnDraw(drawingContext);
            drawingContext.Pop();
        }
    }
}

using Xamarin.Forms.Platform.WPF;

namespace YourNamespace
{
    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);
            Forms.Init();
            FormsMaterial.Init();
            Forms.SetFlags("Shapes_Experimental");
            Forms.SetFlags("RadioButton_Experimental");
            Forms.SetFlags("Expander_Experimental");

            // 注册自定义渲染器
            Forms.Init(e, new[] { typeof(RoundedImageRenderer) });
            // ...
        }
    }
}

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.MainPage">
    <StackLayout>
        <local:RoundedImage Source="your_image_source.png" CornerRadius="10" />
    </StackLayout>
</ContentPage>