I have written a C# website using visual studio 2008. I am using the asp.net 3.5 listview control as a frontend for my backend sql server 2005 database. I am having difficulty trying to reference the right event in the listview for disabling one of the controls in my insertitemtemplate. What I want is my textbox control in this template to become disabled when a certain value is selected from my dropdownlist. I thought it would be the itemdatabound event but when the value is selected in my dropdownlist the textbox is still enabled. Is it because I am using update panels that the page isn't getting refreshed upon selecting different dropdown choices? I tried AutoPostBack="true" but that did nothing also?