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 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:
Now, since you got an idea about ASP.NET, it is time to understand the Life Cycle of ASP.NET.
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:
- Application Life Cycle
- 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.
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.
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.
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.
Rendering happens before it sends all the information back to the user. And all this information is stored before being sent back.
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.
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