Alternatives to SelectedIndexChanged that don't fire on form load?

Question

I'm developing in VB.NET with Visual Studio 2005.

I have a ComboBox (myCombo) on a form that gets populated within the Load method.

I also have handled myCombo.SelectedIndexChanged to change a label on the form.

Edit: The way I added the event handler was by double-clicking on the combo box on the designer. Skeleton code then came up in the code view.

It looks like what's happening is when the form loads, SelectedIndexChanged gets fired each time an item is added to myCombo.

This isn't what I want, but I'm thinking there's another event handler that only gets called when the user changes the selection.

Here's some code for what I have:

Private Sub myDlg_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    ' this is all I do with myCombo in this sub

    list = GetListOfItemsToAdd()
    myCombo.DataSource = list 
    myCombo.DisplayMember = "DisplayMember"
    myCombo.ValueMember = "ValueMember"

End Sub

Could someone point me in the right direction?

Thanks as always.

Update: The solution I used was to remove the Handles clause after the event generator, and add this before the "End Sub" above:

AddHandler myCombo.SelectedIndexChanged, AddressOf myCombo_SelectedIndexChanged

Thanks everyone!

Answer 1

SelectedIndexChanged is typically what I use when doing something server side. Can you post some code?

Answer 2

You could only add the event handler after loading the data. (Using the AddHandler keyword)

Answer 3

You could have a boolean which you use to determine whether you are the one doing the changing. When you begin to change the items, set it to true. When you are finished, set it to false. In the event handler, you can test the boolean to determine if the user is the initiator of the changes and ignore the event if not.

Answer 4

SelectionChangeCommitted is the event handler that's called when the user changes the ComboBox selection.

From the MSDN documentation for SelectionChangeCommitted:

SelectionChangeCommitted is raised only when the user changes the combo box selection. Do not use SelectedIndexChanged or SelectedValueChanged to capture user changes, because those events are also raised when the selection changes programmatically.