Book Image

Mastering Entity Framework Core 2.0

By : Prabhakaran Anbazhagan
Book Image

Mastering Entity Framework Core 2.0

By: Prabhakaran Anbazhagan

Overview of this book

Being able to create and maintain data-oriented applications has become crucial in modern programming. This is why Microsoft came up with Entity Framework so architects can optimize storage requirements while also writing efficient and maintainable application code. This book is a comprehensive guide that will show how to utilize the power of the Entity Framework to build efficient .NET Core applications. It not only teaches all the fundamentals of Entity Framework Core but also demonstrates how to use it practically so you can implement it in your software development. The book is divided into three modules. The first module focuses on building entities and relationships. Here you will also learn about different mapping techniques, which will help you choose the one best suited to your application design. Once you have understood the fundamentals of the Entity Framework, you will move on to learn about validation and querying in the second module. It will also teach you how to execute raw SQL queries and extend the Entity Framework to leverage Query Objects using the Query Object Pattern. The final module of the book focuses on performance optimization and managing the security of your application. You will learn to implement failsafe mechanisms using concurrency tokens. The book also explores row-level security and multitenant databases in detail. By the end of the book, you will be proficient in implementing Entity Framework on your .NET Core applications.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface
4
Building Relationships – Understanding Mapping

Performing CRUD operations


We have already seen how to create CRUD operations right from scaffolding controllers to their corresponding views for the Blog model, so we will create them for the Post model in this section:

  1. Right-click on the Controllers folder and select Add | New Scaffolded Item.
  2.  Add Scaffold dialog box, select MVC Controller with views, using Entity Framework:

  1. In the Add Controller dialog box, select the appropriate Model class and Data Context class (Post and MasteringEFCoreDbFirstContext in our case) along with the auto-generated controller name, PostsController:

  1. Next click Add as shown in the following screenshot:

Scaffolded items

Note

The Blog URL should be displayed instead of the Blog ID, which was part of the scaffolding. As displaying the ID raises security issues and usability concerns, let's change this mapping to URL.

Let's start our changes from the Index.cshml file, where we have listed Blog.Id instead of Blog.Url

    @foreach (var item in Model) {
      <tr&gt...