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When updates are made, the LINQ to SQL ORM will automatically ensure that all business rules and validation logic we’ve added (as partial methods) to the LINQ to SQL data model pass before persisting anything to the database.

Important: The beauty of LINQ and LINQ to SQL is that it obviously isn’t tied to being used only in UI scenarios – or with particular UI binding controls like the Linq Data Source.

The control (via its Data Source ID) and indicates which columns should be included in the grid, what their header text should be, as well as what sort expression to use when the column header is selected.

Now that we have the basics of our web UI working against our LINQ to SQL data-model, we can go ahead and further customize the UI and behavior.

I can add a edit/delete button on the Grid and automatically have update support as well.

For example: When I run the page I’ll now get a filter dropdownlist of all categories at the top of the page: My last step is to configure the Grid View to only show those Products in the category the end-user selects from the dropdownlist.We’ll then want to select the table within our data model that we want to be the primary entity for the to bind against.For this scenario we’ll want to select the “Products” entity class we built.We’ll begin working on the application by first defining the data model we’ll use to represent our database.I discussed how to create a LINQ to SQL data model using VS 2008’s LINQ to SQL designer in Part 2 of this series.

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