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We can modify the data access layer we've been building to use SPROCs to handle updates, instead of dynamic SQL, in one of two ways: 1) By using the LINQ to SQL designer to graphically configure SPROCs to execute in response to Insert/Update/Delete operations on our data model classes.or: 2) By adding a Northwind Data Context partial class in our project, and then by implementing the appropriate Insert/Update/Delete partial methods provided on it (for example: Insert Order, Update Order, Delete Order) that will be called when we insert/update/delete data model objects.Why haven't I showed you how to call a SPROC for doing inserts/updates/deletes instead yet? The way you add data model validation logic is exactly the same (so all the validation rules on our data model classes above still apply when we use SPROCs).The code snippet above where we use our data access layer to retrieve a customer, update it, and then add a new order associated with it is also regardless of whether we are using dynamic SQL for updates, or whether we have configured our data model classes to use SPROCs instead.If you are still reading this, you might be feeling confused about where SPROCs fit into this post.Why did I show you above how to write code that works with our data model objects, and then causes dynamic SQL to run?The caller of the SPROC will pass in NULL as a value when calling it - and the SPROC then passes back the newly created Order ID value as the output value (by calling the SCOPE_IDENTITY() function at the end of the SPROC).
Below are the first six parts in this series: In part 6 I demonstrated how you can optionally use database stored procedures (SPROCs) and user defined functions (UDFs) to query and retrieve data using your LINQ to SQL data model.
This programming model symmetry is powerful both in that you don't have to learn two ways of doing things, and also because it means that you don't have to decide up front at the beginning of your project whether you are going to use SPROCs or not.
You can start off using the dynamic SQL support provided by the LINQ to SQL ORM for all queries, inserts, updates and deletes.
When building a LINQ to SQL data layer you'll usually want to encapsulate common LINQ queries (or SPROC invocations) into helper methods that you add to your Data Context class.
We can do this by adding a partial class to our project.
We can write the below code to do all of this within a single transaction.