如何将WriteableBitmap转换为BitmapImage？

BitmapImage bitmapImage = new BitmapImage(new Uri("arka_projects_as_logo.png", UriKind.Relative)); Image uiElement = new Image() { Source = bitmapImage }; ScaleTransform t = new ScaleTransform() { ScaleX = 0.2, ScaleY = 0.2 }; WriteableBitmap writeableBitmap = new WriteableBitmap(uiElement,t); 

我想将此转换的结果（writeableBitmap）插入到System.Windows.Controls.Image中。 我这样做的时候：

 Image arkaImage = new Image() { Source = writeableBitmap }; 

arkaImage根本没有显示。 有什么办法可以让它发挥作用？

Answer 1

 WriteableBitmap wb = .. using (MemoryStream ms = new MemoryStream()) { wb.SaveJpeg(ms, (int)image1.Width, (int)image1.Height, 0, 100); BitmapImage bmp = new BitmapImage(); bmp.SetSource(ms); } 

Answer 2

你为什么不直接将ScaleTransform应用于UIElement ？