Hello there! Currently im in the process of upgrading a number of asp.net 1.1 custom controls (all inherit from System.Web.UI.WebControls.WebControl, please not this is NOT a user control) to asp.net 4.0 and would like to use partial rendering.
We used to use Anthem .net controls (these operated in a similar way to the UpdatePanel controls- they would simulate a postback while only updating certain portions of a page) but there does not seem to be an easy alternative for custom controls- I have tried inheriting from the UpdatePanel control but this has not proved successful. There are a number of DropDownLists within the control and when a value is selected, i would like to update the custom control. Can anyone suggest any good places to read up on using AJAX with custom controls or what I might need to alter to get inheriting from the UpdatePanel control working?