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If I don't put in the Mode Changing event implementation I get an exception: "The Details View 'dvw Work Item' fired event Mode Changing which wasn't handled." I do intend on adding other custom code into this method because certain actions need to happen when you start editing or inserting.Here is the code I have so far: How did you use a repeater instead of a Details View, that would be strange because each now is the next field instead of a row like the Grid View. You can also use event receivers to validate the data that the user wants to change.This walkthrough is based on the first one where I have a custom list with planets of our solar system.The reason why item-updating event receiver fires twice in case of document libraries is because of check-in/checkout.Also it can fire twice in case of doc library/list if we are updating the current item values with in this item updating event. https:// @Robert about the before properties, yes your right they would be the same regardless....
Before you can deploy the event receiver you have to change the file to bind the Update Adding event receiver to all custom lists.The changed values can be retrieved from the After Properties of the incoming properties argument.