Question about the combo box

[gibea00]

HI !

I have some combo box in which the user cannot write. He has to pick an item in the list. How can i do that ?

In another combo box the user can chose an existing item in the list or write something else. Is it possible for me, in my code, to know if the user select an item in the list or write something in the combo box ?

Thanks for your help

Alexandre

[aniskhan]

Q#1
Set dropDownStyle property to dropdownlist of combobox to allow the user to only select from dropdown list.

Q#2
Save the SelectedIndex when dropDown is Closed.

    Private _itemIndex As Integer = -1

    Private Sub ComboBox1_DropDownClosed(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.DropDownClosed
        _itemIndex = ComboBox1.SelectedIndex
    End Sub

When dropDown then update the selectedItem to the new Value.

    Private Sub ComboBox1_DropDown(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.DropDown
        If _itemIndex <> -1 Then
            ComboBox1.Items(_itemIndex) = ComboBox1.Text
        End If
    End Sub