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The Item Updating logic needs to compare various dates and number fields to determine if the data could be submitted.
Basically the raised event was performing data validation for the List Item being updated.
I have a List View that's bound to a LINQDatasource control and need to get the primary key value of the table within the Item Updated event handler.
I have no problem getting the value from within the Item Updating event handler because the List View Update Event Args parameter provides access to the keys collection.
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I’ve seen a lot of posts saying you can’t redirect to a custom error page from a SPItem Event Receiver in Share Point 2007. Redirect Url which will send you to a custom error page, instead of the OOB error page that displays your properties. this is simple enough, all you have to do is set properties.
I've also tried getting the value from the New Values and Old Values collections but it is not available. The keys collection is available as part of the Grid View Update Event Args after an update, why not the List View?
The problem, of course, may be not so obvious, but anyway, to prevent event receiver to fire several times, there is a common practice in Share Point: just use Disable Event Firing and Enable Event Firing methods.