The goal is to asynchronously fetch an image from a url and then set it to a BitmapSource viewmodel property (which is databound in a view).
I can use LoadImageFromUrl to get a Splat.IBitmap, but I can't figure out how to connect that to a BitmapSource. In fact, I'm not sure that I'm using this method correctly at all.
Here's what I've got:
using Akavache;
using System.Reactive.Linq;
// ...others...
var myViewModel = ...;
var url = @"http://upload.wikimedia.org/wikipedia/meta/0/08/Wikipedia-logo-v2_1x.png";
BlobCache.LocalMachine.LoadImageFromUrl(url, false, 200, 183)
.ObserveOnDispatcher()
// up to here, it's fine
// what goes below is the question
// I manually instantiate an Action object so as to explicitly pick that override,
// but LoadImageFromUrl returns an IObservable<Splat.IBitmap>, so I'm not picking the wrong <T> here
.Subscribe(new Action<Splat.IBitmap>(pic => {
// haha, nope: myViewModel.someBitmapSource = (BitmapSource)pic);
}), ex => Debug.WriteLine(ex));
Other things I thought of:
- Check documentation: none seems to exist that I can find
- Google around: slim pickings, nothing directly helpful
- Look to see how this method is used in Akavanche tests: it doesn't appear to be called anywhere
- Since a
Splat-namespace object is returned, check Splat tests/docs: Closer. The splat readme says:
.
// ToNative always converts an IBitmap into the type that the platform
// uses, such as UIBitmap on iOS or BitmapSource in WPF
ImageView.Source = ViewModel.ProfileImage.ToNative();
Great, except ToNative() doesn't make sense in this case because it's not a member of the Splat.IBitmap interface.
And now I'm out of ideas.
