How do I return a response to Web API?

Depending on which of these is returned, Web API uses a different mechanism to create the HTTP response.

Convert directly to an HTTP response message.

Call ExecuteAsync to create an HttpResponseMessage, then convert to an HTTP response message.

Write the serialized return value into the response body; return 200 (OK)..

Why is JSON used instead of HTML in rest APIs?

REST supports all kinds of content included HTML. It’s clear that most of RESTful applications and Web APIs are focused on data. So such formats like JSON, XML and YAML are more convenient to build and parse.

What are the return types of Web API?

The Web API action method can have following return types.Void.Primitive type or Complex type.HttpResponseMessage.IHttpActionResult.


REST or RESTful API design (Representational State Transfer) is designed to take advantage of existing protocols. While REST can be used over nearly any protocol, it usually takes advantage of HTTP when used for Web APIs. … REST API Design was defined by Dr. Roy Fielding in his 2000 doctorate dissertation.

Is XML better than JSON?

A couple obvious ones are: Less verbose- XML uses more words than necessary. JSON is faster- Parsing XML software is slow and cumbersome. Many of these DOM manipulation libraries can lead to your applications using large amounts of memory due to the verbosity and cost of parsing large XML files.

How do I return XML Web API?

5 Answers. If you return a serializable object, WebAPI will automatically send JSON or XML based on the Accept header that your client sends. If you return a string, you’ll get a string. If you don’t want the controller to decide the return object type, you should set your method return type as System.


No, they are not. HTTP stands for HyperText Transfer Protocol and is a way to transfer files. … Note that there is also a big difference between a RESTful API and a HTTP API. A RESTful API adheres ALL the REST constraints set out in its “format” documentation (in the dissertation of Roy Fielding).

How do I return a web API list?

Web API: How To Return List Of Custom Type (JSON)In the Templates pane, select Installed Templates and expand visual C# node and select web. In the list of project Templates, select ASP.NET Web Application and Click OK. … In the new ASP.NET Project dialog, select Web API and Click Ok.We got StudentApp (our Application Name) application with all needed files.

Is REST API and RESTful API are same?

One of the most popular types of API is REST or, as they’re sometimes known, RESTful APIs. REST or RESTful APIs were designed to take advantage of existing protocols. While REST – or Representational State Transfer – can be used over nearly any protocol, when used for web APIs it typically takes advantage of HTTP.

What is difference between REST API and RESTful API?

What’s the difference between a REST API and a RESTful one? … The short answer is that REST stands for Representational State Transfer. It’s an architectural pattern for creating web services. A RESTful service is one that implements that pattern.

How do I validate a Web API model?

Web API has Model Binding and Model Validation support. The techniques given below will be used for the validation….IsValid to validate the model.publicIHttpActionResultPost(Productproduct) {if (ModelState.IsValid) {//Dosomethingwiththeproduct(notshown).returnOk();} else {returnBadRequest();}}

Should REST API always return JSON?

REST APIs should accept JSON for request payload and also send responses to JSON. JSON is the standard for transferring data. Almost every networked technology can use it: JavaScript has built-in methods to encode and decode JSON either through the Fetch API or another HTTP client.

What is Web API example?

The ASP.NET Web API is an extensible framework for building HTTP based services that can be accessed in different applications on different platforms such as web, windows, mobile etc. It works more or less the same way as ASP.NET MVC web application except that it sends data as a response instead of html view.

How do I return HTML Web API?

How to return html file from Web APIIn our webmthod we just need to add an attribute [Produces(“text/html”)] , This attribute indicates that the output will be in html not a simple string.If you want to understand the difference between with and without [Produces(“text/html”)] attribute, here are two different outputs.More items…


2 Answers. The same resource may return either XML or JSON depending upon the request, but it shouldn’t return both at the same time. You will know which one to return based upon the request, so there is no need to generate both — just generate the one you’ll be returning.

How do I return a web API view?

So, if you want to return a View you need to use the simple ol’ Controller . The WebApi “way” is like a webservice where you exchange data with another service (returning JSON or XML to that service, not a View). So whenever you want to return a webpage ( View ) for a user you don’t use the Web API.

What is the difference between REST API and HTTP API?

Long story short, there is a big difference between a RESTful API and a HTTP API. A RESTful API adheres ALL the REST constraints set out in its “format” documentation (in the dissertation of Roy Fielding). A HTTP API is ANY API that makes use of HTTP as their transfer protocol.

Is REST API always JSON?

Short answer: no. Long answer: no, not yet. One of the key constraints on REST is that a RESTful API must use hypermedia formats (the HATEOAS constraint). Unfortunately, JSON is not a hypermedia format.