Visual Basic 2015 Unleashed

Generating the Database and Executing Data Operations

So far, you have created your data model in code, but you do not have a database yet. The power of Code First is that the Entity Framework checks whether the database exists and, if not, it automatically creates one for you with the name specified in the connection string, without writing a single line of code. After the database is ready, data operations can be performed. The goal is now to generate some Author and Book entities and populate the database. This is an Insert operation. The DbSet(Of T) class is a collection, and therefore it exposes Add and Remove methods for adding and removing entity instances—that is, data into and from the database. You will use the same techniques learned ...