loading the source of a BitmapImage in WPF?

Question

In a silverlight app, I have a BitmapImage defined as System.Windows.Media.Imaging.BitmapImage and it as a method called "SetSource" where I can set the source like this:

BitmapImage bitmap = new BitmapImage();
System.IO.Stream stream = _scene.GetStream();
if (stream == null) return;
bitmap.SetSource(stream);

In a WPF application I have also have a Bitmap image defined as System.Windows.Media.Imaging.BitmapImage but there is no SetSource method. How do I set the source in a WPF app like I do in a Silverlight app?

Also, it is a stream, not a string. It is not a URI. so "UriSource" method does not work. I tried this:

        System.IO.Stream stream = _scene.GetStream();
        if (stream == null) return;
        BitmapImage bitmap = new BitmapImage();

        bitmap.UriSource = new Uri(stream.ToString());

And at runtime, it threw an error tha URI cannot be determined. Is the URI an identifier for the intranet? Are you sure that this is not a silverlight thing? I am doing a WPF application

Clemens · Accepted Answer · 2015-11-06 09:33:44Z

12

You'll have to set the BitmapImage.StreamSource property:

BitmapImage bitmap = new BitmapImage();
bitmap.BeginInit();
bitmap.StreamSource = _scene.GetStream();
bitmap.EndInit();

If you want to close the stream right after creating the bitmap, you would also have to set the BitmapCacheOption.OnLoad option:

using (Stream stream = _scene.GetStream())
{
    bitmap.BeginInit();
    bitmap.CacheOption = BitmapCacheOption.OnLoad;
    bitmap.StreamSource = stream;
    bitmap.EndInit();
}

edited Nov 6, 2015 at 9:33

answered Aug 6, 2012 at 14:39

Clemens

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Habib · Accepted Answer · 2012-08-02 04:51:58Z

1

You can use the constructor to specify the UriSource

BitmapImage bmp = new BitmapImage(uriSource: new Uri());

Or you can use BitmapImage.StreamSource property to set the StreamSource

answered Aug 2, 2012 at 4:51

Habib

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