How to test for events

Question

How can I test through code to see if two events have been fired in succession , namely the TextChanged event and the FormClosing (or FormClosed) event? Also, if I am merely hiding the form instead of closing it, is that the same procedure?

Vulpes · Answer

One thing we can definitely say is that the Form_FormClosing and Form_FormClosed events will fire last of all and in that order. These events won't, of course, fire if you simply hide the form but the Form_VisibleChanged event will fire. Events which relate to controls on the form should fire in the order in which those events occur but you can test this with MessageBox.Show as Javeed suggested.

Duane · Answer

I was not explicit enough, sorry for the confusion. The result of determining that the two events have been fired in succession is that several textboxes and labels will have their text values deleted, so that a new procedure can start (without the prior data). For instance, the TextChanged event of a particular label is fired, the the form that contains that label is closed, then the text values in various textboxes will be deleted. I hope that clears it up.

Javeed M Shaikh · Answer

Hi Duane, you can put a messagebox in these events and then check which one is called first and so on, to verify the sequence of events.

How to test for events

Answers (3)