SelectedValue which is invalid because it does not exist in the list of items

Question

I encounter this problem repeatedly, and haven\'t a clue what is causing it. I get an exception in the DataBind: SelectedValue which is invalid because it does not exist i

Answer 1

I kept getting this error.
Weird thing is that before I set the datasource and rebind after deleting an item the selected index = -1.

If I explicitly set the selectedIndex = -1; then it works and doesn't throw an error.

So even though it was already -1 setting it to -1 stops it from erroring.

Weird eh?