Occurs periodically during a download to provide navigation progress information.
Assembly: PresentationFramework (in PresentationFramework.dll)
is passed a NavigationProgressEventArgs which exposes the following progress information:
is raised once for every 1024 bytes of content downloaded, and once more if the number of remaining bytes is ever less than 1024 bytes. For this reason, handling provides a useful way to track and display the progress of a current download.
won't be raised in some cases, such as when the same piece of content is navigated to, or when a content fragment is navigated to on content that is currently loaded (that is, the value of the Content property).
When navigating to a compiled XAML resource, the final event may not be raised. This means that at the end of the download, the last reported BytesRead value may not equal the MaxBytes value. Handle the LoadCompleted event to be notified when the navigation has finished.