Professional C# 7 and .NET Core 2.0, 7th Edition

32Web API

WHAT’S IN THIS CHAPTER?

• Overview of the ASP.NET Web API
• Creating Web API controllers
• Using repositories with dependency injection
• Creating .NET clients calling REST APIs
• Using Entity Framework Core from services
• Creating Metadata using Swagger
• Using OData
• Implementing Azure Functions

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

The Wrox.com code downloads for this chapter are found at www.wrox.com on the Download Code tab. The source code is also available at https://github.com/ProfessionalCSharp/ProfessionalCSharp7 in the directory API.

The code for this chapter is divided into the following major examples:

• Book Service Sample
• Book Service Async Sample
• Book Service Client App
• Book Service OData
• Book Service Azure Functions

OVERVIEW

When Windows Communication Foundation (WCF) was announced with .NET 3.0, it was the technology for communication and replaced several other technologies in the .NET stack (a few mentioned here are .NET Remoting and ASP.NET Web Services). The goal was to have one communication technology that is very flexible and fulfills all needs. However, WCF was initially based on SOAP (Simple Object Access Protocol). Nowadays we have many scenarios where the powerful SOAP enhancements are not needed. For simpler scenarios such as HTTP requests returning JSON, WCF is too complex. That’s why another technology was introduced in 2012: ASP.NET Web API. With the release of ASP.NET Core, the third major version of a Web API using an ASP.NET technology ...