Updating data using linq
Each instance of a class entity represents a row within the database table.When we defined our data model, the LINQ to SQL designer also created a custom Data Context class that provides the main conduit by which we'll query our database and apply updates/changes.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.The properties of each class map to the columns of a corresponding table in the database.The SELECT Operation Conculsion To perform select, insert, update and delete operations we create a table and create a data context class; in other words a dbml file.In this file designer view we drag and drop the COURSE table from the Server Explorer.Today, in this tutorial, I will try to give some more examples on other types of database operations, that writes/updates the database.
Nor does it represent the opinion of my dog, because I don’t have one. In this example I’m going to extend a little bit of what I have demonstrated in my previous example.
First, we will have to retrieve the ‘user’ object we want to delete, and then add this deletion operation in the queue by ‘Delete On Submit’ method.
Finally commit the operation using ‘Submit Changes’ method as before; Just like insert operation, this delete operation example given above will work for .
Please use the database structure given below, if you want to try the following examples directly.
I am assuming, you already know how to create dbml/linq to sql classes: Being Lin Q as a ORM, it’s quite easy and sql syntax free way to insert data using Lin Q.