CODEWITHSUNDEEP
c#wpf
Daniel Clark
Daniel Clark

Reputation: 615

Black image when saving PNG from clipboard

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

Here is the code I am using 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 ideas why it won't persrve the alpha channels of a PNG?

Thanks

Dan

Edit: I should of mentioned that black images were happening when copying an image from Internet Explorer 9. Works perfectly when copying an image from either Chrome or Firefox. Any workarounds for IE9 issue?

Upvotes: 4

Views: 2633

Answers (1)

Yahia
Yahia

Reputation: 70369

What happens if just do this:

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

EDIT - for WPF try this:

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);
    }
}

Upvotes: 3

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