Loaded event of a WPF user control fire two times

Question

Hi,

To implement tab based environment in WPF we need to convert our WPF form to user control to accomplish tab based environment, however when doing this, loaded event of user control is called two times.

While searching on the internet other people also pointed this issue. How can we ensure that loaded event is called only one time, because when it is called multiple times initialization of controls happen multiple times.

Thanks

Answer 1

Set a loaded flag in the event, and, if the flag has already been set, don't do anything.

Answer 2

Actually, there already is a IsLoaded property, so you can add this line to the beginning of the loaded event handler:

If Me.IsLoaded Then Return