/// <summary>
/// Occurs when the ASP.NET event handler finishes execution.
/// </summary>
/// <param name="sender">
/// The source of the event.
/// </param>
/// <param name="e">
/// An <see cref="T:System.EventArgs">EventArgs</see> that contains the event data.
/// </param>
/// <returns>
/// The <see cref="T:System.Threading.Tasks.Task"/>.
/// </returns>
private Task PostProcessImage(object sender, EventArgs e)
{
HttpContext context = ((HttpApplication)sender).Context;
object cachedPathObject = context.Items[CachedPathKey];
if (cachedPathObject != null)
{
string cachedPath = cachedPathObject.ToString();
// Trim the cache.
DiskCache.TrimCachedFolders(cachedPath);
// Fire the post processing event.
EventHandler <PostProcessingEventArgs> handler = OnPostProcessing;
if (handler != null)
{
context.Items[CachedPathKey] = null;
return(Task.Run(() => handler(this, new PostProcessingEventArgs {
CachedImagePath = cachedPath
})));
}
}
return(Task.FromResult <object>(null));
}