我正在畫布上工作并在其上加載圖像。如何將圖像分辨率設(shè)置為 640X480 像素？解碼像素高度和解碼像素寬度不起作用。   ImageBrush brush = new ImageBrush();        BitmapImage src = new BitmapImage(new Uri(("C:\\Users\\i2v\\Desktop\\GoogleMapTA.jpg"), UriKind.Relative));        src.DecodePixelHeight = 480;        src.DecodePixelWidth = 640;        brush.ImageSource = src;     //   brush.Stretch = Stretch.None;        canvas.Background = brush;        canvas.Height = src.Height;        canvas.Width = src.Width;