CRUD Operation in ASP.NET Web API with Example

Click Here to Download WebAPICRUDOperation.zip


In this article we are demonstrating how Insert, Update, View and Delete operation works in Output using HTTP service.
We can also call as CRUD (Create, Read, Update, Delete) Operation.

In this WebAPI example we are using following HTTP Methods for CURD Operations.

• GET method retrieves the data or resources at a specified URI.
• PUT method updates the data or resource at a specified URI.
• POST method send data to the specified URI.
• DELETE method deletes a resource at a specified URI.

Now we are creating project step by step.

STEP 1 :

Create a Web API Project.

Create First ASP.Net Web API Project Step By Step

Click Here to Download WebAPIProject_First.zip


ASP.NET Web API is a framework for developing web APIs on top of the .NET Framework. Web API serves data on HTTP. HTTP service is so powerful and compatible with various clients and platform.

Web API uses in Mobile devices, various browsers and in desktop applications to get or post data.

In this project or tutorial, we will use ASP.NET Web API to create a web API that returns a list of customers and depend on parameters we provide. We are getting results direct on browser and also display in web page with use of jQuery.

As we are developing this project in new framework following are the prerequisite:
Following is the requirement :

This example requires Visual Studio with ASP.NET MVC 4.

We can use any following:

    Visual Studio 2012
    Visual Studio Express 2012 for Web
    Visual Studio 2010 with ASP.NET MVC 4 installed.
    Visual Web Developer 2010 Express with ASP.NET MVC 4 installed.

If you are using Visual Studio 2010 or Visual Web Developer 2010 Express, you will need to install ASP.NET MVC 4 separately.

This project we developed in Visual Studio 2012.

Here is the step-by-step explanation of how to create Web API Project.

STEP 1 : 

Lifecycle of an HTTP message in ASP.NET Web API

This Image shows how an HTTP request flows through the Web API pipeline, and how the HTTP response arrive back. It has also shows extensibility points, where we can add custom code or even replace the default behavior entirely.

This Image is used by web developers who want to understand the Web API pipeline. You can download that image from below link. This image is available in PDF file.

For printing purpose it's size is 24"X30". There are two version of that image one is full color and other is a gray-scale version.

Image : 

Click To Download full color Image.
Click To Download gray scale Image.

Source : http://www.microsoft.com