Question

C# WinForms: When I call Clear() method of a TabPages:

tabControl.TabPages.Clear();

it is also firing SelectedIndexChanged event

tabControl_SelectedIndexChanged

. But I don’t want that. Is there a formal or even a hackish way to prevent this being called when I call Clear()? I still want it to be called whenever the user clicks on a tab, but I just don’t want it to automatically get called when somewhere else I am calling the Clear() method.

Thank you.

Answer 1

In addition to the comment I made you could make it an Extension Method:

public static void ClearAllTabPages(this TabControl tc, EventHandler eh)
{
  tc.SelectedIndexChanged -= eh;
  tc.TabPages.Clear();
  tc.SelectedIndexChanged += eh;
}

Now you don’t need to remember to unhook and rehook the event handler in every place you would like to clear the TabPages at. You just call:

tabControl.ClearAllTabPages(tabControl_SelectedIndexChanged);

Note:
I havn’t tried this code but it should work.