Check if 2 listboxes have selected items

Steven Sandford

Hi Guys,
Fairly new to VB but enjoying making a small app. One thing I am stuck on is trying to check if 2 listboxes have had an item selected.
If the 2 listboxes have an item selected then enable a button.
I have placed the following code inside the Listbox1 Click Event sub which is public.

If listbox1.selectedIndex => 0 And listbox2.selectedIndex => 0 Then
button1.enabled = True
End If

Now this seems to enable my button only if an item is selected in listbox2 and then you need to click twice within listbox1 before it recognises the selection.
I have pieced this together just from google so if I am doing it wrong I would like to know the correct format or the most sound approach.

Thank you

2 Replies

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Steven Sandford12y ago
Thanks Vulpes, I managed to get this working with a little help
I created a single method with the above code, and then passed the method through both event handlers
Vulpes12y ago
Rather than using the ListBox1 Click event, I'd try placing that code in the SelectedIndexChanged event handlers for BOTH ListBox1 and ListBox2.

Notice also that the 'greater than or equal' operator should be written the other way around i.e. >= instead of =>.