WPF User Control loading twice

user-controls, wpf

Solution

Long story short, use a boolean flag:

    private bool firstLoad = true;
    private void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
        if (firstLoad)
        {
            firstLoad = false;

            // Do somthing that want to do only once...
        }
    }

Longer story: Apparently, in WPF you can't assume the loaded event is fired only once.

I've encountered the same situation using a user control in a Tabitem. Every time you activate a Tabitem by selecting it the loaded event is fired for all controls within this tabitem.

Cheers

Problem

Hai am having a WPF user control, when i use that control in another window it loading twice, so its throwing exception for me, coz am having some function in usercontrol_loaded event, when it loading twice it throwing error, is there any other way to check if the usercontrol is loaded like that, else how to solve this issue.

Original source