Updating data using linq

Posted by / 23-Aug-2020 21:31

On of the big advantages of using a stored procedure is that you can define some additional checks and business logic on the server, which improves perfromance and reliability of entire application.With our visual model designer - Entity Developer you can make all of these actions in GUI, and Entity Developer will generate the necessary code automatically.If the query executed successfully, you should see a new record in the Customers table of the Northwind database, as shown below: Update Objects in Entity Framework 4.0 As I mentioned earlier, objects attached to the object context are managed by that object context.The steps to update an existing entity are quite simple.For example, you may want to perform some validation, calculate some of the columns or even change data in other tables when saving changes to an entity object.

Then, the only condition we need in the delete command is that Company Id is equal to a certain value.

To avoid the necessity of changing the generated code, these methods are declared as partial: To customize performing the insert, update or delete operation, we can implement the corresponding method somewhere in our code.

In this case, this method will be executed instead of the default one.

For this case, we can implement the delete method as follows: This is great if you want to change the standard behaviour completely.

But if you only want to perform some checks at the client side before, e.g., updating a company, don't you need to rewrite the whole update statement, with all its checks and a number of 'if's for setting modified columns only?

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