public static tbl Department Get Department(int id) And here is the calling code in Main method. Get Department(4551); Everything works fine at this point.
Now, let's try to update the department using the method below. Update Department(department); The code will run without any exceptions!
Below is a class model created for the Northwind sample database and which I'll be using in this blog post: When we designed our data model using the LINQ to SQL data designer above we defined five data model classes: Product, Category, Customer, Order and Order Detail.
LINQ to SQL is a built-in O/RM (object relational mapper) that ships in the .This generated context is inside a The Thread Static attribute ensures that every thread will access a different instance. Sometimes IIS reuses the thread for other requests, and the context is not a new, fresh instance.I am playing around with LINQ to SQL in conjunction with business objects.In order to send or retrieve objects to or from the database, you need a Data Context instance.This is an instance of a class that inherits Data Context. One context is generated for every database you access to. But our problems didn't stop here unfortunatelly 🙁 You might expect the thread to die when the response is sent back to the client side, but it doesn't.NET Framework 3.5 release, and which enables you to easily model relational databases using . You can use LINQ expressions to query the database with them, as well as update/insert/delete data.Below are the first three parts of my LINQ to SQL series: In today's blog post I'll cover how we we can use the data model we created earlier, and use it to update, insert, and delete data.You can start with a new instance of the Data Context if the changes in memory are to be discarded.I'm not 100% sure about LINQ but i would say that the seperation is based on transaction control.Although you can attach objects of one Data Context to a different Data Context but when you do this all hell breaks loose.Let's take a look at the example below where I am using a Department Repository class to get the Department by Id.