That model is shown in Figure This model has two entity types: Category and Product.
It could be any other project type as well, but for simplicity's sake we'll use console project throughout the tutorial.
Start Visual Studio and create a new console application. You prepare a query and then iterate through it as you would do with a usual collection of objects. Now let's query data from two tables united with a foreign key.
You can find links to Entity Framework Core tutorials in the See Also section, in the end of this topic. NET Entity Framework is an object-relational mapping (ORM) framework for the . It is designed to enable developers to create data access applications by programming against a conceptual application model instead of programming directly against a relational storage schema. Replace the old code with this: Crm Demo Entities context = new Crm Demo Entities(); // Create a new category Product_Categories new Category = new Product_Categories(); new Category.
The goal is to decrease the amount of code and maintenance required for data-oriented applications. NET Framework 3.5 Service Pack 1 or higher, Visual Studio 2008 Service Pack 1 or higher. Read Line(); Dim context As Crm Demo Entities = New Crm Demo Entities Dim query = From it In context.
Add the following block of code to the method Main: Crm Demo Entities context = new Crm Demo Entities(); var query = from it in context. Company ID select it; foreach (Company comp in query) Console.