combobox in vb.net

Question

how to hide or disable items in one combobox on the basis of selected item in another combobox in vb.net?

Answer 1

Manipulate the datasource of the second combobox in the selected index changed event of the first one.

Answer 2

As gerrie said , you have to make a condition in the second combobox selected indexed changed event, like so :

Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
    If ComboBox1.SelectedValue = "my Value" Then
        ComboBox2.Visible = False
    End If
End Sub

Where "my value" is a value I have in combobox1

Edit :

The combobox keeps the values inserted unless you clear them. By using this line of code

ComboBox2.Items.Clear()

Or otherwise you put the values in a list like a Datatable and point the combobox datasource of that specific Datatable

Answer 3

i hv tried this.

combobox2_selectedindexchange()
if combobox2.selectedindex=0 then
 combobox1.items.add("apple")
 combobox1.items.add("mango")

elseif combobox2.selectedindex=1 then
 combobox1.items.add("grapes")
 combobox1.items.add("banana")

end if

it is adding the items on change of index.. but it is also displaying previously added items also.. wat to do???