Stored procedure insert not updating database
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We can write the below code to do all of this within a single transaction.LINQ to SQL will ensure that our business logic validation rules are clean before saving anything in the database: LINQ to SQL monitors the modifications we make to the objects we retrieve from the Data Context, and keeps track of all of the objects we add into it. Submit Changes() at the end, LINQ to SQL will check that our business logic rules are valid, and if so automatically generate the appropriate dynamic SQL to update our Customer record above, and insert a new record into the Orders table.
We'll begin switching our data model to use SPROCs by starting with the Order object.
We can do this by writing LINQ expressions against our data model classes to query the database and populate them (I cover how to-do this in my Part 3: Querying our Database LINQ to SQL tutorial).
Alternatively we could map SPROCs to our Data Context and use them to populate the data model classes (I cover how to-do this in my Part 6: Retrieving Data using Stored Procedures LINQ to SQL tutorial).
Over the last few weeks I've been writing a series of blog posts that cover LINQ to SQL.
LINQ to SQL is a built-in O/RM (object relational mapper) that ships in the .
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?
For example, we could add a helper method called "Get Customer()" that enables us to lookup and retrieve a Customer object from the database based on their Customer ID value: We now have a data access layer that encapsulates our data model, integrates business validation rules, and enables us to query, update, insert, and delete the data.
Let's look at a simple scenario using it where we retrieve an existing customer object, update the customer's Contact Name and Phone Number, and then create a new Order object and associate it with them.
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.