Download C# 3.0 cookbook with Examples by Jay Hilyard, Stephen Teilhet PDF

By Jay Hilyard, Stephen Teilhet

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For more on XElement and LINQ to XML, see Chapter 15. Example 1-1. > 18 | Chapter 1: Language Integrated Query (LINQ) The two sets of data are joined using LINQ and, in particular, the join keyword.

Dbml file) to the project, which opens the designer. Both of these help you to build out the DataContext and Entity Classes for your database that can then be used with LINQ (or other programming constructs if you wish). NET Connection and Command object rolled into one. You use it to establish your connection, execute queries, or access tables directly via Entity Classes. Linq. GetTable( ); } } // More Table definitions, one for each table in the database } Creating XML Straight from a Database | 25 The Entity Class definitions for the Northwind database are all present in the generated code as well, with each table having an Entity Class defined for it.

Quantity) * od. Join( )) to building up the query instead of the query expression manner (join x on y equals z) if you have done more C# than SQL. NET that facilitates rapid database development. It is targeted at the scenarios where you want to program almost directly against the database schema. Most of these scenarios have one-to-one correlations between strongly typed classes and database tables. If you are in more of an enterprise development scenario with lots of stored procedures and databases that have moved away from “one table equals one entity” scenarios, you would want to look into LINQ to Entities.

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