Andrew Frederick

Often, we want to disable the control that triggered an asynchronous postback until the postback has completed. This prohibites the user from triggering another postback until the current one is complete.

Do you want to maintain the scroll position of a GridView, Div, Panel, or whatever that is inside of an UpdatePanel after an asynchronous postback?  Normally, if the updatepanel posts back, the item will scroll back to the top because it has been reloaded.  What you need to do is “remember” where the item was scrolled to and jump back to there after the postback.  Place the following script after the ScriptManager on your page.  And since the _endRequest event of the PageRequestManager happens before the page is rendered, you’ll never even see your item move!

Typically, if we want to programmatically select a particular AccordionPane within an ASP.NET AJAX Accordion control, we set the SelectedIndex property.  This is great if we know the exact order of our AccordionPanes at all times, but this isn’t always so.  Let’s say, for instance, that you have four panes (making their indices 0, 1, 2, and 3, respectively).  If we make the third one (index 2) invisible, now the fourth one has an index of 2.  So let’s create a method to select the AccordionPane by its ID instead.

A very common scenario is the one where we want to update the information in a record if it already exists in the table, and if it doesn’t exist, we want to create a new record with the information. 

Many people when developing want to look at the browser’s View Source to make sure that things are being outputted correctly or to see where in the DOM certain things are showing up. However, if you are using the Ajax concept of partial rendering (usually via UpdatePanels), what you get is the initial state of the page when it was first loaded before any partial page updates, not the state of the page as it is currently.

Have you ever wanted to control your <asp:Timer> control from client-side code?