private async Task LoadImageAsync()
{
if (_uri != null)
{
if (IsCacheEnabled && _isHttpSource)
{
try
{
var img = await ImageCache.Instance.GetFromCacheAsync(_uri, true, _tokenSource.Token);
_image.Source = img;
ImageExOpened?.Invoke(this, new ImageExOpenedEventArgs());
VisualStateManager.GoToState(this, LoadedState, true);
}
catch (OperationCanceledException)
{
// nothing to do as cancellation has been requested.
}
catch (Exception e)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(e));
VisualStateManager.GoToState(this, FailedState, true);
}
}
else
{
_image.Source = new BitmapImage(_uri);
}
}
}
private async Task LoadImageAsync()
{
if (!_isLoadingImage && _uri != null)
{
_isLoadingImage = true;
if (IsCacheEnabled && _isHttpSource)
{
try
{
_image.Source = await ImageCache.GetFromCacheAsync(_uri, true);
ImageExOpened?.Invoke(this, new ImageExOpenedEventArgs());
VisualStateManager.GoToState(this, LoadedState, true);
}
catch (Exception e)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(e));
VisualStateManager.GoToState(this, FailedState, true);
}
}
else
{
_image.Source = new BitmapImage(_uri);
}
_isLoadingImage = false;
}
}
private async Task SetHttpSourceCustomCached(Uri imageUri)
{
try
{
var propValues = new List <KeyValuePair <string, object> >();
if (DecodePixelHeight > 0)
{
propValues.Add(new KeyValuePair <string, object>(nameof(DecodePixelHeight), DecodePixelHeight));
}
if (DecodePixelWidth > 0)
{
propValues.Add(new KeyValuePair <string, object>(nameof(DecodePixelWidth), DecodePixelWidth));
}
if (propValues.Count > 0)
{
propValues.Add(new KeyValuePair <string, object>(nameof(DecodePixelType), DecodePixelType));
}
var img = await ImageCache.Instance.GetFromCacheAsync(imageUri, true, _tokenSource.Token, propValues);
lock (LockObj)
{
// If you have many imageEx in a virtualized listview for instance
// controls will be recycled and the uri will change while waiting for the previous one to load
if (_uri == imageUri)
{
AttachSource(img);
ImageExOpened?.Invoke(this, new ImageExOpenedEventArgs());
VisualStateManager.GoToState(this, LoadedState, true);
}
}
}
catch (OperationCanceledException)
{
// nothing to do as cancellation has been requested.
}
catch (Exception e)
{
lock (LockObj)
{
if (_uri == imageUri)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(e));
VisualStateManager.GoToState(this, FailedState, true);
}
}
}
}
private async Task LoadImageAsync()
{
if (_uri != null)
{
if (IsCacheEnabled && _isHttpSource)
{
var ogUri = _uri;
try
{
var img = await ImageCache.Instance.GetFromCacheAsync(ogUri, Path.GetFileName(ogUri.ToString()), true);
lock (_lockObj)
{
// If you have many imageEx in a virtualized listview for instance
// controls will be recycled and the uri will change while waiting for the previous one to load
if (_uri == ogUri)
{
_image.Source = img;
ImageExOpened?.Invoke(this, new ImageExOpenedEventArgs());
VisualStateManager.GoToState(this, LoadedState, true);
}
}
}
catch (Exception e)
{
lock (_lockObj)
{
if (_uri == ogUri)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(e));
VisualStateManager.GoToState(this, FailedState, true);
}
}
}
}
else
{
_image.Source = new BitmapImage(_uri);
}
}
}
private void OnImageFailed(object sender, ExceptionRoutedEventArgs e)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(new Exception(e.ErrorMessage)));
VisualStateManager.GoToState(this, FailedState, true);
}
private async void SetSource(object source)
{
if (!IsInitialized)
{
return;
}
_tokenSource?.Cancel();
_tokenSource = new CancellationTokenSource();
AttachSource(null);
if (source == null)
{
return;
}
VisualStateManager.GoToState(this, LoadingState, true);
var imageSource = source as ImageSource;
if (imageSource != null)
{
AttachSource(imageSource);
return;
}
var uri = source as Uri;
if (uri == null)
{
var url = source as string ?? source.ToString();
if (!Uri.TryCreate(url, UriKind.RelativeOrAbsolute, out uri))
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(new UriFormatException("Invalid uri specified.")));
VisualStateManager.GoToState(this, FailedState, true);
return;
}
}
if (!IsHttpUri(uri) && !uri.IsAbsoluteUri)
{
uri = new Uri("ms-appx:///" + uri.OriginalString.TrimStart('/'));
}
try
{
await LoadImageAsync(uri, _tokenSource.Token);
}
catch (OperationCanceledException)
{
// nothing to do as cancellation has been requested.
}
catch (Exception e)
{
ImageExFailed?.Invoke(this, new ImageExFailedEventArgs(e));
VisualStateManager.GoToState(this, FailedState, true);
}
}
