WPF中实现图片文件转换成Visual对象，Viewport3D对象转换成图片

1、图片文件转换成Visual对象

        private Visual CreateVisual(string imageFileName)
        {
            BitmapImage bmp = new BitmapImage(new Uri(imageFileName));

            Image img = new Image();
            img.Width = 100;
            img.Source = bmp;

            Border outBordre = new Border();
            outBordre.BorderBrush = Brushes.White;
            outBordre.BorderThickness = new Thickness(0.5);
            outBordre.Child = img;

            return outBordre;
        }

2、Viewport3D对象转换成图片

private Image ConvertViewport3DToImage(Viewport3D vp)
        {
            Grid grid = new Grid();
            grid.Children.Add(vp);

            RenderTargetBitmap bitmap = CreateImageBrushFromVisual(grid);

            Image img = new Image();
            img.Source = bitmap;
            img.Stretch = Stretch.None;

            img.Width = vp.Width;
            img.Height = vp.Height;

            return img;
        }

        private RenderTargetBitmap CreateImageBrushFromVisual(FrameworkElement element)
        {
            RenderTargetBitmap bitmapImage =
                new RenderTargetBitmap((int)(element.Width), (int)(element.Height), 96, 96, PixelFormats.Pbgra32);

            bitmapImage.Render(element);

            return bitmapImage;
        }