All You Need to Know About ASP.NET Life Cycle

ASP.NET is the most preferred technology used for developing web applications nowadays. While developing an application, there are several steps involved in its life cycle. Here, in this tutorial about ASP.NET Life Cycle, you will look into all the steps needed to build an application.

What Is ASP.NET?

ASP.NET is a server-side technology used for developing dynamic websites and web applications. It enables developers to create web applications using HTML, CSS, and JavaScript.


ASP.NET is the latest version of Active Server Pages, which Microsoft developed to build websites. It is a web application framework released in 2002 and has an extension of .aspx.  

Some of the major companies that use ASP.NET are:

  • Facebook

  • Instagram

  • Twitter
  • Email

  • Youtube


Now, since you got an idea about ASP.NET, it is time to understand the Life Cycle of ASP.NET.

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Life Cycle of ASP.NET

The ASP.NET Life Cycle is very crucial to develop applications. It includes various stages that help to produce dynamic output.


The Life Cycle of ASP.NET is divided into two categories:

  1. Application Life Cycle

  2. Page Life Cycle

Application Life Cycle

The Application Life Cycle has the following steps:


1. Application Start

The webserver executes the application start when a user requests an application for access. In this method, it sets all global variables to default.

2. Object Creation

Object creation holds all the HTTP Context, HTTP Request, and HTTP Response by the webserver. It also contains information about the request, cookies, and browsing information.

3. HTTP Application

HTTP Application is an object created by the webserver. It helps to process all the subsequent information that is sent to the user.

4. Dispose

Dispose is an event that is called before the application is destroyed. It also helps to release manually unmanaged resources when the objects are no longer needed.

5. Application End

Application End is the last stage of the application life cycle. It helps to unload the memory.        

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Page Life Cycle

The Page Life Cycle has certain phases that help in writing custom controls and initializing an application.

Following are the different phases of the Page Life Cycle:


1. Page Request

Page Request is the first step of the page life cycle. When a user request is made, then the server checks the request and compiles the pages. Once the compilation is done, then the request is sent back to the user.

2. Page Start

Page Start helps in creating two objects: Request and response. The Request holds all the information which the user sent. While the response contains all the information that is sent back to the user.

3. Page Initialization

Page Initialization helps to set all the controls on the pages. It has a separate ID, and it applies themes to the pages in this step.

4. Page Load

Page Load helps to load all the control properties of an application. It also helps to provide information using view state and control state.

5. Validation

Validation happens when the execution of an application is successful. It returns two conditions: true and false. If execution is successful, it returns true, otherwise false.

6. Event Handling

Event Handling takes place when the same pages are loaded. It is a response for the validation. When the same page is loaded, a Postback event is called, which checks the page’s credentials.

7. Rendering

Rendering happens before it sends all the information back to the user. And all this information is stored before being sent back.

8. Unload

Unload is a process that helps in deleting all unwanted information from the memory once the output is sent to the user.

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By now, you would have learned everything you need to know about the ASP.NET Life Cycle. You looked into what ASP.NET is, and different companies that use ASP.NET. 

Then, in the ASP.NET Life Cycle, you learned about the two types of Life Cycle: Application Life Cycle and Page Life Cycle. In that, you saw the different steps and phases involved in the two types of ASP.NET Life Cycle.

If you are planning to learn .NET, consider enrolling in Simplilearn’s .NET Programming course. This comprehensive program will help you master the fundamentals of .NET programming and will help you create .NET projects. In the .NET programming certification course, you will be introduced to .NET space and coding with C#, including Visual Studio and Winforms, which will help you excel in your career.

If you have any questions for us, let us know in the comment section. Our experts will answer them for you right away!

About the Author

Hemant DeshpandeHemant Deshpande

Hemant Deshpande, PMP has more than 17 years of experience working for various global MNC's. He has more than 10 years of experience in managing large transformation programs for Fortune 500 clients across verticals such as Banking, Finance, Insurance, Healthcare, Telecom and others. During his career he has worked across the geographies - North America, Europe, Middle East, and Asia Pacific. Hemant is an internationally Certified Executive Coach (CCA/ICF Approved) working with corporate leaders. He also provides Management Consulting and Training services. He is passionate about writing and regularly blogs and writes content for top websites. His motto in life - Making a positive difference.

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