c# - 值不在 WriteableBitmap 异常范围内

Question

我在我的 WindowsPhone 应用程序中使用 WriteableBitmap 将 UIElement 转换为 WriteableBitmap。我在以下代码中随机得到 Value does not fall within the expected range exception。但我无法找到根本原因。你能请任何人帮助我吗？

Size imageSize = new Size(element.ActualWidth, element.ActualHeight);

WriteableBitmap image = new WriteableBitmap((int)imageSize.Width, (int)imageSize.Height);
image.Render(element, null);
image.Invalidate();
return image;

Answer 1

试试这个:

WriteableBitmap image = new WriteableBitmap((int)this.ActualWidth, (int)this.ActualHeight);
image.Render(element, new MatrixTransform());
image.Invalidate();
return image;