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Stopping the SelectedIndexChanged Event

Posted on 2007-03-23
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Last Modified: 2008-01-09
I am updating a combo box during a form load which is firing off the SelectedIndexChanged event, but I do not want it to fire this event at this stage. Is there a way to stop this?

Regards,

Josh
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Question by:supersuny2k
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ZeonFlash earned 2000 total points
ID: 18779401
There are several methods you can use to get around this problem.

1.  You can always remove the event handler and add it back again after loading.  This isn't necessarily the "best" way of doing things, considering the problem that occurs if the loading stops before adding the event handler back.

RemoveHandler Combobox1.SelectedIndexChanged, AddressOf Combobox1_SelectedIndexChanged
.
.
AddHandler Combobox1.SelectedIndexChanged, AddressOf Combobox1_SelectedIndexChanged

2.  You can create a class variable along the lines of "IsLoading" that you set to True while the form is loading and False when it's done.  Then at the top of your SelectedIndexChanged event, you check the flag and continue on if not loading:

     Private IsLoading As Boolean = False

      Private Sub Combobox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles Combobox1.SelectedIndexChanged
     If IsLoading Then Exit Sub
      .
      .

            End Sub
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