Im trying to insert a row at the bottom of Grid view with out postback
My Grid has one coloum with rad Combo
placed my Grid view and button in Update panel and in code behined on button click add a new row to datatable and Binding It to grid view
in Upadate panel gave trigger attributes
<asp:AsyncPostBackTrigger controlid="btnAddrw" eventname="Click" />
im getting the below error as attached
if i remove the above trigger code row is getting added but page is getting Postback
How to fix this?