C# and .NET have been around for a very long time, but their constant growth means there’s always more to learn. We will start our discussion by first understanding what is OpenID and OAuth. In this article, we will explore some of these new features introduced in ASP.NET Web API 2.0 In its simplest form, a Web API is an API over the web (HTTP). The diagram above demonstrates the Authentication process for an OAuth provider. Moreover, the client can indicate which format it wants by setting the Accept header in the HTTP request message. Learn some effective error handling strategies that you can use in your .NET projects. Object-Relational-Mapping. Web API is the great framework for exposing your data and service to different-different devices. HTTP is simple, flexible, and ubiquitous. File Name: EwsManagedApi.msi. You will create an Application with various Web API's, use Dependency Injection and connect to the Database using Entity Framework. Choose Web API if you want to build a service that supports only HTTP protocol. The latest ASP.NET Web API 2.2 package has the following version: "5.2.0". I’ve written previously on how to handle multiple get methods in Asp.Net 5 Web API. You will also learn to Unit test using MOQ. Then create a Facebook app as shown below -, Copy the Application ID and Secret Key in a notepad from the Dashboard as shown below -. I'm using the Empty template for this tutorial because I want to show Web API without MVC. In this tutorial, you will use ASP.NET Web API to create a web API that returns a list of products. In Web API, a controller is an object that handles HTTP requests. The Web API template uses ASP.NET MVC to provide API help pages. If the connection string is not available, create one and click on the Next button. Right click the controller and choose "New Scaffolded Item" as shown below -, In the next step, choose the controller template. A model is an object that represents the data in your application. Choose the “Web” option in installed templates and choose “ASP.NET Web Application (.NET Framework)”. Open "WebApiConfig.cs" file from App_Start folder. A server-side web API is a programmatic interface consisting of one or more publicly exposed endpoints to a defined request–response message system, typically expressed in JSON or XML, which is exposed via the web—most commonly by means of an HTTP -based web server. Earlier, in Web API 1.0, we configured routing at a central location. February 4, 2017 September 23, 2019 by Bryan. In the Add Controller dialog, name the controller "ProductsController". 3. It has no way of controlling feature access. For example if we are querying the Customer Entity, we can use $select operator to fetch only required properties like CustomerID, ContactName and City. CORS. The Model-View-Controller (MVC) pattern. The next feature we will discuss is authenticating Web API 2.0 using an External Authentication Service like Facebook, Google, Twitter or Microsoft Account. You can host Web API inside IIS or inside your own process (self-hosting). First we will install the OData package using Package Manager Console. Also add three tables, Customers, Employees and Orders. To get a list of products, send an HTTP GET request to "/api/products". It also adds per-request lifetime support. Difference Between ASP.NET Web API & WCF, ASP.NET MVC application & ASP.NET Web API application. HttpServer ASP.NET Web API is a framework that makes it easy to build HTTP … These Web API tutorials will help you learn the essentials of ASP.NET Web API starting from the basics to advanced level. 2. HTTP methods represent those requested actions. Two versions of the ASP.NET Web API framework have been released so far, with Web API 2.0 being the latest one. It is a very efficient and lightweight technology to build RESTful web services in .NET. Their need was more towards controlling what features to make available based on Authentication Types offered at the Provider and those sought by the relying party. It also provides a couple of helper methods like -, ASP.NET Web API 2.0 now supports routing configuration at Web API method level or at the Controller level using a Route attribute. It’s time to implement our logic which will perform CRUD operations using ASP.NET Web API. I have two other posts on multiple GET methods, one for ASP.NET 5 Web Api, and another for Web Api 2. Click OK. 3. You should see a Local Account to login as well as a Facebook login at right hand side. When you perform routing, your route prefix will always be common. First option is how to use $select. You have a working web API. Select Add, then select Controller. Right click on the Controllers folder > Add > Controller> selecting Web API 2 OData v3 Controller with actions, using Entity Framework > click Add. Let's talk about why we should think about using this new feature. REST APIs with .NET and C#. Routes are defined in the WebApiConfig static class and puts its configurations into the … How to use in Client Application 1. Now observe the code generated by the new scaffolding option. For example, some commonly-used HTTP methods will retrieve data from a server, submit data to a server for processing, delete an item from the server's data store, etc. You can use [RoutePrefix] attribute at a Controller level as shown below -, Test the [RoutePrefix] attribute and you will see the same output. In this tutorial, you will use ASP.NET Web API to create a web API that returns a list of products. Let's add a new project using another Visual Studio instance which will be an Empty ASP.NET Application. 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