O'Reilly logo

Entity Framework 4.1: Expert's Cookbook by Tim Rayburn, Devlin Liles

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Validating collection properties

In this recipe, we will learn to define restrictions on the number of related objects that are defined.

Getting ready

We will be using the NuGet Package Manager to install the Entity Framework 4.1 assemblies.

The package installer can be found at http://nuget.org.

We will also be using a database for connecting to the data and updating it.

Open the Improving Collection Property Validation solution in the included source code examples.

How to do it...

Let's get connected to the database using the following steps:

  1. We start by adding a new unit test named ValidationTests to the test project. We make a test that connects to the database and adds an object. This will test whether the configuration and our validation code are ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required