Question

I have a dropdownlist with the autopostback set to true. I want the user to confirm if they really want to change the value, which on post back fires a server side event (selectedindexchanged).

I have tried adding an onchange attribute ‘return confirm(‘Please click OK to change. Otherwise click CANCEL?’;’) but it will not postback regardless of the confirm result and the value in the list does not revert back if cancel selected.

When I remove the onchange attribute from the DropdownList tag, the page does postback. It does not when the onchange attribute is added. Do I still need to wire the event handler (I’m on C# .Net 2.0 ).

Any leads will be helpful.

Thanks!

Answer 1

Have you tried to set the onChange event to a javascript function and then inside the function display the javascript alert and utilize the __doPostback function if it passes?

i.e.

    drpControl.Attributes('onChange') = 'DisplayConfirmation();'  function DisplayConfirmation() {   if (confirm('Are you sure you want to do this?')) {     __doPostback('drpControl','');   } }