How to render bitmap into canvas in WPF?

Question

I\'ve subclassed Canvas so that I can override its Render function. I need to know how I can load a bitmap in WPF and render that to the canvas. I\

Answer 1

If you do want to paint background of canvas, I would recommend using ImageBrush as Background, 'coz that's simple as you dont need to subclass Canvas to override Onender.

But I'll give you a demo source-code for what you have asked:

Create a class (I've called it ImageCanvas)

    using System.Windows;
    using System.Windows.Controls;
    using System.Windows.Media;

    namespace WpfApplication1
    {
        public class ImageCanvas : Canvas
        {
            public ImageSource CanvasImageSource
            {
                get { return (ImageSource)GetValue(CanvasImageSourceProperty); }
                set { SetValue(CanvasImageSourceProperty, value); }
            }

            public static readonly DependencyProperty CanvasImageSourceProperty =
                DependencyProperty.Register("CanvasImageSource", typeof(ImageSource),
                typeof(ImageCanvas), new FrameworkPropertyMetadata(default(ImageSource)));

            protected override void OnRender(System.Windows.Media.DrawingContext dc)
            {
                dc.DrawImage(CanvasImageSource, new Rect(this.RenderSize));
                base.OnRender(dc);
            }
        }
    }

Now you can use it like this: