As I described in Part 1 of this blog post series, the Data Context class is the main conduit by which we'll query entities from the database as well as apply changes back to it.Below is a screen-shot of an empty LINQ to SQL ORM designer surface, and is what you'll see immediately after creating a new LINQ to SQL data model: LINQ to SQL enables you to model classes that map to/from a database.Entity classes defined with LINQ to SQL have to derive from a specific base class, which means that you can have them inherit from any object you want.
Updating linq to sql entities
Product_Id = id, but how do I pass the update statement.
In Part 1 of my LINQ to SQL blog post series I discussed "What is LINQ to SQL" and provided a basic overview of some of the data scenarios it enables.
Here's an example: Action-- That's a complete solution, however I strongly suggest you try the tutorials section of the MVC Learning portal so you can understand these basic concepts. It's much like how addition and subtraction are the basics of math. Save Changes() Unable to update the Entity Set 'PRODUCT_DATA' because it has a Defining Query and no Thank you for the the repsonse. It works fine till update Model(qry) and fails at dbcontext. Unfortunately I'm not well-versed in VB, and it's possible (although not likely? So, probably the underlying issue was with Entity Framework. Thank you very much for all the support and needful.
Then make your changes to the model and post it back to your controller. First() qry.v ALUE1 = "Test" qry.value2 = "NAME1" dbcontext. Error: Unable to update the Entity Set ' Well that's certainly an issue.
NET naming conventions, and I usually find having the designer fix these up for me really convenient (especially when adding lots of tables to your model).
If you don't like the name of a class or property that the designer generates, though, you can always override it and change it to any name you want.In my first post I provided code samples that demonstrated how to perform common data scenarios using LINQ to SQL including: I performed all of these data scenarios using a LINQ to SQL class model that looked like the one below: In this second blog post in the series I'm going to go into more detail on how to create the above LINQ to SQL data model.LINQ to SQL, the LINQ to SQL Designer, and all of the features that I'm covering in this blog post series will ship as part of the . You can follow all of the steps below by downloading either Visual Studio "Orcas" Beta 1 or Visual Web Developer Express "Orcas" Beta1.These classes are typically referred to as "Entity Classes" and instances of them are called "Entities". The properties of entity classes typically map to the table's columns.Each instance of an entity class then represents a row within the database table. I can't imagine WHY it would be different, but it's possible. Thanks so much for your time and appreciate your patience. Since it is not fixed, I am not marking it as answer so as not to mislead others.