Updating entity framework conceptual model lithuanian singles dating
To retrieve data you have to first create an instance of the context, then prepare a query with LINQ to Entities or Entity SQL or their mix, and then access the object returned by the query, which may be a collection of objects or a single object.
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.
The Category ID value for a given Product row specifies the category in which that product belongs.
Because the purpose of this post is to illustrate stored procedures and not the richness of the Entity Framework’s mapping capabilities, I’ll use a conceptual model that is a simple 1:1 mapping to the logical database schema.
In this post, I cover the use of stored procedures for change processing: taking changes (inserts, updates, and deletes) made to entities at the object layer and propagating them to the database.
The examples used in this post are based on the Orcas March CTP. NET Entity Framework should first read the I’ll illustrate the use of stored procedures in the context of a sample application.
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.