Where has App.Current.Host gone in Universal Windows Phone 8.1 apps?

Question

Trying to handle multi-resolution images in a Windows Phone Universal App I came across this article from Microsoft.

Unfortunately it only applies to Windows Phone 8 and Windows Phone Silverlight 8.1. When using the code samples they mention of:

private static bool IsWvga
{
    get
    {
        return App.Current.Host.Content.ScaleFactor == 100;
    }
}

In this case App.Current doesn't have a Host property - Host presumably being the SilverlightHost property mentioned here.

Has anyone found a way to do the equivalent in an 8.1 Universal App?

Answer 1

If you want to handle image scaling then it is handled by folder name in Windows Phone 8.1 Universal Apps. Here is how:

To use these images in XAML you just give the file name and the OS does the rest.

 <Image Grid.Row="1" Grid.Column="0" Source="wpimages/resolution.jpg" VerticalAlignment="Top" Width="100"/>

An additional method is simply to have multiple copies of the image at different scales and to name them in the same way as the folders i.e resolution.scale-100.jpg, resolution.scale-240.jpg. You still name the file the same in your XAML.

I will share an article on that in the future.