ASP.NET MVC request life cycle:

In ASP.NET MVC, understanding the request life cycle is essential for building robust web applications. Let’s explore the key stages of the ASP.NET MVC request life cycle: 

 

  Routing: 

• When a client makes a request (e.g., visits a URL), the routing module processes it. 
• The routing module maps the requested URL to a specific controller action based on predefined routes. 
• Routes are defined in the RouteConfig.cs (or Startup.cs for ASP.NET Core) file. 

MVC Handler: 

• Once the route is determined, the MVC handler is responsible for creating the appropriate controller instance. 
• The controller is instantiated, and the action method is invoked. Controller Action Execution: 
• The controller’s action method processes the request. 
• It interacts with the model (data) and prepares the data to be displayed. 
• The action method returns an ActionResult (e.g., a view, JSON, or redirect). 

View Result: 

• The view engine processes the view result returned by the action method. 
• It locates the corresponding view file (.cshtml) based on conventions. 
• The view is rendered, and dynamic data is injected into the HTML. 

View Engine and View: 

• The view engine compiles the view into HTML. 
• The final HTML content is sent as the response to the client. 
• The client’s browser renders the page. 

Application_End (Optional): 

• If the application pool recycles or certain thresholds are exceeded, the Application_End event in Global.asax.cs is fired. 
• This event allows you to perform cleanup tasks before the application shuts down.

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