VS 2010 - Updating Master Page Control From User Control

Aug 19, 2010

I have a label on my master page (called mainMenu) that shows the number of items in a cart. The label wasn't getting updated when the cart was cleared until after an additional postback or redirect so I created a method on the master page called UpdateNumberOfItemsInCart to update the label text.

Using the MasterType directive on the Cart page allowing me to strongly type the master page, I can access the update method from the Cart page. There is a user control also named Cart that actually contains the 'clear cart' button so I setup an event on the user control also called UpdateNumberOfItemsInCart. I wire up the Cart control's event on the Cart page which then makes a call to Master.UpdateNumberOfItemsInCart();

So far so good except when I wrap the Cart control with an update panel the update to the cart count label doesn't happen.

[Code]....

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