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programing in visual basic?
three listbox are in the form list1 an list2 contains some items concatenate both item and add selected items(from list1 and list2 ) into list3.....i have tried allot but none output is executing
2 Answers
- 1 decade ago
I assume you're using the Visual Studio .NET form builder to add your controls to the form. What you probably want to do is add an event handler to list1 and list2 that will allow you to update list3 whenever their selections change.
You could try something like this, but it may not work straight out of the box:
Private Sub ConcatenateSelections() Handles list1.SelectedIndexChanged, list2.SelectedIndexChanged
list3.Items.Clear()
For Each list1Item As Object In list1.SelectedItems
list3.Items.Add(list1Item.ToString())
Next
For Each list2Item As Object In list2.SelectedItems
list3.Items.Add(list2Item.ToString())
Next
list3.TopIndex = 0
End Sub
