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 know its too late to answer, but what I tried is an dirty solution but it worked. After databinding, I am insert a item at index 0

ddl.Items.Insert(0, new ListItem("---Select---","-1"));

And on setting,

I am placing try catch, In catch i am setting Value to -1