Gridview edit not updating

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If, on the other hand, Compare All Values is used, the Update method must accept both the updated and original non-primary key field values along with the original primary key field(s).

To help clarify any confusion, let's look at a concrete example.

By default, the Text Boxes have no validation controls associated with them, but your business rules might require certain validation.

A particular field may be required or might need to be entered in a specific format.

Instead of just using WHERE [Product ID] = @original_Product ID, with optimistic concurrency the WHERE clause would have read: This would prevent an UPDATE from happening if, between the time the user clicked a Grid View row's Edit button and having clicked the Update button, another user had modified that particular row.

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For this demo, though, we'll need to add an Update method to the Product DAL class.

This will add a Command Field to the Grid View with an Edit button.

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