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How to: Apply a Transform to a BitmapImage
.NET Framework 3.0
///// Create a BitmapImage and set it's DecodePixelWidth to 200. Use ///// ///// this BitmapImage as a source for other BitmapSource objects. ///// BitmapImage myBitmapImage = new BitmapImage(); // BitmapSource objects like BitmapImage can only have their properties // changed within a BeginInit/EndInit block. myBitmapImage.BeginInit(); myBitmapImage.UriSource = new Uri(@"C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures\Water Lilies.jpg"); // To save significant application memory, set the DecodePixelWidth or // DecodePixelHeight of the BitmapImage value of the image source to the desired // height or width of the rendered image. If you don't do this, the application will // cache the image as though it were rendered as its normal size rather then just // the size that is displayed. // Note: In order to preserve aspect ratio, set DecodePixelWidth // or DecodePixelHeight but not both. myBitmapImage.DecodePixelWidth = 200; myBitmapImage.EndInit(); /////////////////// Create a BitmapSource that Rotates the image ////////////////////// // Use the BitmapImage created above as the source for a new BitmapSource object // that will be scaled to a different size. Create a new BitmapSource by // scaling the original one. // Note: New BitmapSource does not cache. It is always pulled when required. // Create the new BitmapSource that will be used to scale the size of the source. TransformedBitmap myRotatedBitmapSource = new TransformedBitmap(); // BitmapSource objects like TransformedBitmap can only have their properties // changed within a BeginInit/EndInit block. myRotatedBitmapSource.BeginInit(); // Use the BitmapSource object defined above as the source for this BitmapSource. // This creates a "chain" of BitmapSource objects which essentially inherit from each other. myRotatedBitmapSource.Source = myBitmapImage; // Flip the source 90 degrees. myRotatedBitmapSource.Transform = new RotateTransform(90); myRotatedBitmapSource.EndInit();