Question

I have a Image (Frameworkelement) on my GUI.
There is a image in there. Now I’m performing a doubleclick at this image and I want, that
the Image saves itself and is going to be opened, with the default imageviewer.

My Code:

void image_MouseDown(object sender, MouseButtonEventArgs e)
{
    //Wayaround, cause there is no DoubleClick Event on Image 
    if (e.ChangedButton == MouseButton.Left && e.ClickCount == 2)
    {
        SaveToPng(((Image)sender), "SavedPicture.png");
        Process.Start("SavedPicture.png");
    }
}

void SaveToPng(FrameworkElement visual, string fileName)
{
    var encoder = new PngBitmapEncoder();
    SaveUsingEncoder(visual, fileName, encoder);
}

void SaveUsingEncoder(FrameworkElement visual, string fileName, BitmapEncoder encoder)
{
    RenderTargetBitmap bitmap = new RenderTargetBitmap(
        (int)visual.ActualWidth,
        (int)visual.ActualHeight,
        96,
        96,
        PixelFormats.Pbgra32);
    bitmap.Render(visual);
    BitmapFrame frame = BitmapFrame.Create(bitmap);
    encoder.Frames.Add(frame);

    using (var stream = File.Create(fileName))
    {
        encoder.Save(stream);
    }
}

Opening the picture works fine with Process.Start. The problem is the saving, well it saves the picture: SavedPicture.png but, Its just black, so theres no graphic.. Maybe someone could tell me, whats wrong in my code or knows a better way of saving a image in WPF.

Answer 1

Problem solved.

I used this: File.WriteAllBytes()
to save the image from binaryformat