Question

I used to be able to do so very much with just the Bitmap and Graphics objects. Now that I’ve been using WPF the only thing I seem to be able to do is load an image and show it and make it dance around the stupid screen. Why did they get rid of these very useful tools. Are they trying to stupefy .Net?

All I want to do is load an image from a file and cut it into two parts. This was easy with .Net 2.0 and System.Drawing. But with WPF, I’m hitting a brick wall without using some very low level code. I’ve tried working with WriteableBitmap. But it doesn’t seem to really be what I’m wanting. Is there no way to wrap a DrawingContext around a BitmapImage or something?

Please tell me that WPF is more than HTML for applications. I am REALLY frustrated!!

Edits:

Also, how on earth does one save an image to a file?

Answer 1

If you want to cut the image in two parts, why not use the CroppedBitmap class?

Consider the following XAML. One source BitmapImage shared by two CroppedBitmaps, each showing different parts of the source.

 <Window.Resources>
    <BitmapImage x:Key="bmp" UriSource="SomeBitmap.jpg" />
</Window.Resources>

<StackPanel>
    <Image>
        <Image.Source>
            <CroppedBitmap Source="{StaticResource ResourceKey=bmp}">
                <CroppedBitmap.SourceRect>
                    <Int32Rect X="0" Y="0" Width="100" Height="100" />
                </CroppedBitmap.SourceRect>
            </CroppedBitmap>
        </Image.Source>
    </Image>
    <Image>
        <Image.Source>
            <CroppedBitmap Source="{StaticResource ResourceKey=bmp}">
                <CroppedBitmap.SourceRect>
                    <Int32Rect X="100" Y="150" Width="50" Height="50" />
                </CroppedBitmap.SourceRect>
            </CroppedBitmap>
        </Image.Source>
    </Image>
</StackPanel>

Update: to do something similar in code:

        var bitmapImage = new BitmapImage(new Uri(...));
        var sourceRect = new Int32Rect(10, 10, 50, 50);
        var croppedBitmap = new CroppedBitmap(bitmapImage, sourceRect);