How do I "force load" a BitmapImage so I can access the PixelWidth/Height without involving an Image class instance?

Question

Hi there,

I am loading a packaged bitmap:

                BitmapImage bitmapImage = new BitmapImage(new Uri(@"ms-appx:///Image.png"));

I want to get the PixelWidth and PixelHeight of the BitmapImage, but I noticed that they are alwasy 0, unless I assign it to an instance of the Image class:

            Image = new Image();
            Image.Source = bitmapImage;

After the above line, I am able to get the appropriate PixelWidth and PixelHeight values.

Is there a way for me to achieve the same thing without creating Image instances?

Thanks,

Henry = ]

Answer 1

I think you don't need to load the entire image at all and instead use the property system. Look at:

http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.storagefile.properties.aspx
http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.fileproperties.storageitemcontentproperties.getimagepropertiesasync.aspx
http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.fileproperties.imageproperties.width.aspx
http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.fileproperties.imageproperties.height.aspx

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Filip Skakun

Answer 2

Hey Filip

Thanks! As you suggested, using the code below gets me what I wanted!

ImageProperties imageProperties = await imageFile.Properties.GetImagePropertiesAsync();

Thanks,

Henry = ]

Answer 3

I'm downloading the Image from a Uri from internet, not accesing the image from the local storage,  so i cannot use ImageProperties... Any other idea to forcé the image to be downloaded and so the widht and height attributes can be accessed? Thanks!

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Fernando Urkijo Cereceda