public void getSize(string uriString, IPromise promise)
{
if (string.IsNullOrEmpty(uriString))
{
promise.Reject(ErrorInvalidUri, "Cannot get the size of an image for an empty URI.");
return;
}
DispatcherHelpers.RunOnDispatcher(async () =>
{
try
{
var bitmapImage = new BitmapImage();
var loadQuery = bitmapImage.GetStreamLoadObservable()
.Where(status => status.LoadStatus == ImageLoadStatus.OnLoadEnd)
.FirstAsync()
.Replay(1);
using (loadQuery.Connect())
{
using (var stream = await BitmapImageHelpers.GetStreamAsync(uriString))
{
await bitmapImage.SetSourceAsync(stream);
}
await loadQuery;
promise.Resolve(new JObject
{
{ "width", bitmapImage.PixelWidth },
{ "height", bitmapImage.PixelHeight },
});
}
}
catch (Exception ex)
{
promise.Reject(ErrorGetSizeFailure, ex.Message);
}
});
}