Updating a row in linq to sql Live sex chat for her


18-Apr-2018 02:59

Net to open a database connection, create a command object, execute a SQL statement, iterate through the results and create your C# class instances (objects) manually. The following method marks a single product as discontinued, based on the product ID: As you can see, I’m using a simple LINQ query to get a single product with a Product ID matching the product ID parameter of the method, setting the Discontinued flag, and saving the changes. Let’s say I wanted to discontinue all products which are out of stock and have no units on order, instead of just one.The overhead of this is a little bit more than if I were using ADO. In this case, I have to execute one database call to retrieve the product, and one database call to update the data. Using only the built-in Entity Framework functionality, I would have to do something like this: This LOOKS pretty simple – I’m iterating through the context. Behind the scenes, Entity Framework is executing one SQL ‘select’ call to retrieve all the products, but when you call Save Changes, it is executing one SQL ‘update’ call per product.However, each of those potentially unlimited number of Update statements will be executed individually because there's no way for the database engine to optimize these updates.

updating a row in linq to sql-22

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After hours of searching, the only thing I had found was that everyone agreed this was a problem, but nobody had a solution.If you let EF LINQ mange the process, on the other hand, you'll first have to retrieve all the Premium Customer rows and then iterate through all of the resulting objects, updating each one individually.



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