BitmapImage旋转

Question

在我的ModelView中，我有一个BitmapImages的ObservableCollection，它显示在我的视图的列表框中。我正在尝试旋转ObservableCollection中选定的图像。

Answer 1

好了，弄清楚了，如果有什么看起来很愚蠢的事情，你可以让我知道

//Create a transform
TransformedBitmap tBmp = new TransformedBitmap();
tBmp.BeginInit();

//Set the source = to the image currently selected
tBmp.Source = _Scans[_selectedImage].MyImage;
RotateTransform rt = new RotateTransform(180);
tBmp.Transform = rt;
tBmp.EndInit();

//Create a new source after the transform
BitmapSource s1 = tBmp;
BitmapImage bi = BitmapSourceToBitmapImage(s1);

//Add create the item and replace the current item in the collection
//edited according to comment
//ScannedImages s = new ScannedImages();
//s.MyImage = bi;
//_Scans[_selectedImage] = s;
Scans[_selectedImage].MyImage = BitmapSourceToBitmapImage(s1);

Answer 2

在定义图像显示方式(作为ListBox项)的DateTemplate中，可以使用.RenderTransform属性来转换/旋转控件。

Button示例：

<Button
            <Button.RenderTransform>
                <RotateTransform CenterX="0" CenterY="0" Angle="45"/>
            </Button.RenderTransform>
            Test</Button>

Have a read more on How to Rotate an object? MSDN Article