Black image when saving PNG from clipboard

Question

I am trying to save a PNG image that has been copied to the clipboard, but it either becomes solid black or black around areas that should be transparent.

Here is the code I use to capture and save the image

var clipboardImage = (InteropBitmap)Clipboard.GetImage(); Image.SaveImage(clipboardImage, Path.Combine(Config.App.ApplicationDataImagesPath, string.Format("{0}.{1}", imageId, "png"))); public static void SaveImage(BitmapSource bitmapImage, string filename) { using (var fileStream = new FileStream(filename, FileMode.Create)) { var pngBitmapEncoder = new PngBitmapEncoder(); pngBitmapEncoder.Frames.Add(BitmapFrame.Create(bitmapImage)); pngBitmapEncoder.Save(fileStream); fileStream.Close(); fileStream.Dispose(); } } 

Does anyone have any idea why he won't look for PNG alpha channels?

thanks

Dan

Edit: I should mention that black images were executed when copying an image from Internet Explorer 9. Works great when copying an image from Chrome or Firefox. Any workarounds for IE9 issue?

Answer 1

What happens if you just do this:

 Clipboard.GetImage().Save ("XXX.png", System.Drawing.Imaging.ImageFormat.Png); 

EDIT - For WPF, try the following:

 public static void SaveClipboardImageToFile(string filePath) { var image = Clipboard.GetImage(); using (var fileStream = new FileStream(filePath, FileMode.Create)) { BitmapEncoder encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(image)); encoder.Save(fileStream); } }