Fill WPF rectangle with Image

Question

I created new WPF control, added a Rectangle to it, and everyhing works alright, its drawn like it should be. But I just cant paint the rectangle with an actual Image.

BitmapImage bi = GetImage();
ImageBrush imgBrush= new ImageBrush(bi);

this.rectangle.Fill = imgBrush;

But this code just makes the rectangle transparent, except the stroke.

This is the GetImage() method:

BitmapImage bi;

using (MemoryStream ms = new MemoryStream())
{
    bi = new BitmapImage();
    bi.CacheOption = BitmapCacheOption.OnLoad;

    texture.SaveAsPng(ms, texture.Width, texture.Height);

    ms.Seek(0, SeekOrigin.Begin);

    bi.BeginInit();
    bi.StreamSource = ms;
    bi.EndInit();

    ms.Close();
}
return bi;

texture is an Texture2D class, that is made before this code.

If I return Bitmap insted of BitmapImage here and then save that Bitmap the picture is drawn correctly.

Thank you for your help

Anyone has any idea why it doesnt work? – user1806687 Feb 28 '13 at 15:16 — user1806687, Feb 28 '13 at 15:16

score 4 · Accepted Answer · edited May 23 '17 at 10:26

This is the correct way to convert Bitmap to BitmapImage:

using(MemoryStream memory = new MemoryStream())
{
    bitmap.Save(memory, ImageFormat.Png);
    memory.Position = 0;
    BitmapImage bitmapImage = new BitmapImage();
    bitmapImage.BeginInit();
    bitmapImage.StreamSource = memory;
    bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
    bitmapImage.EndInit();
}

Thanks to "Pawel Lesnikowski", he posted the anwser in the following topic:

Load a WPF BitmapImage from a System.Drawing.Bitmap

Fill WPF rectangle with Image

1 Answers1