Tutorial by Topics: dataannotations

We can add validations to our application by adding Data Annotations to our model classes. Data Annotations allow us to describe the rules we want applied to our model properties, and ASP.NET MVC will take care of enforcing them and displaying appropriate messages to users.

Entity Framework Code-First provides a set of DataAnnotation attributes, which you can apply to your domain classes and properties. DataAnnotation attributes override default Code-First conventions. System.ComponentModel.DataAnnotations includes attributes that impacts on nullability or siz...