Is it possible to transfer the OKButton functionality to a GridView command field?

Hi,

I think you don't need to use server side code to hide the popup, just javascript is enough.

The idea is add a onclick attribute to the linkbutton, and invoke the modalPopupExtender's hide method in this event handler.

For instance:

linkbutton.Attributes.Add("onclick", "$find('" + modalExtender.BehaviorID + "').hide();");