Create an ASP.NET page and add ScriptManager and UpdatePanel controls. Add two Label Web controls to this pageone outside the UpdatePanel and the other within the UpdatePanel. Have the Label Text properties assigned to the current date and time on each page load. When testing the page, note that when the page is first visited, the two Labels' values match, but when a new record is added through the DetailsView control, the Label within the UpdatePanel is updated, but one outside the UpdatePanel is not.

See Sams Teach Yourself ASP.NET 4 in 24 Hours, Complete Starter Kit. at:

https://the-eye.eu/public/Books/IT%20Various/sams_teach_yourself_asp.net_4_in_24_hours.pdf