protected override BitmapImage DownloadBitmap(Uri uri)
{
BeginDownload();
BitmapImage result = null;
try
{
result = _mapsHandler.GetTileBitmap(uri);
if (result != null)
{
#if !DEBUG
SaveCacheImage(result, uri);
#endif
}
else
{
lock (this)
{
result = new System.Windows.Media.Imaging.BitmapImage();
result.BeginInit();
result.CacheOption = System.Windows.Media.Imaging.BitmapCacheOption.OnLoad;
result.UriSource = Utils.ResourceHelper.GetResourceUri("/MapProviders/OSMBinMap/MissingTile.png");
result.EndInit();
result.Freeze();
}
}
}
catch
{
result = null;
RaiseDownloadError();
}
finally
{
EndDownload();
}
return(result);
}