ActionExecutedContext

ActionExecutedContext is a class in ASP.NET MVC that represents the context in which an action method has been executed. It is used by action filters to gain access to information about the action method's execution and to potentially modify the response or take other actions. The ActionExecutedContext class inherits from ControllerContext and implements the IActionFilter interface.

Key properties of ActionExecutedContext include ActionDescriptor, which provides information about the executed action method, and Result, which represents the result that the action method returned. This result can be a view, a redirect, a JSON response, or any other IActionResult. The Exception property is populated if an unhandled exception occurred during action method execution.

Action filters can use ActionExecutedContext to perform tasks such as logging, error handling, or modifying the action result before it is sent to the client. For example, an exception filter can inspect the Exception property and handle the error gracefully, perhaps by returning a specific error view or logging the exception details. Similarly, a result filter could examine the Result property and wrap it in a custom response format.

The ActionExecutedContext is created by the ASP.NET MVC framework after an action method has completed its execution. It is then passed to the OnActionExecuted method of any registered action filters that implement the IActionFilter interface. This allows for a robust and extensible way to interact with and control the action execution pipeline.