What is ActionFilterAttribute?

What is ActionFilterAttribute?

However, in the loose sense, the word action filter is used to refer to any type of filter in the ASP.NET MVC framework. The base ActionFilterAttribute class has the following methods that you can override: OnActionExecuting – This method is called before a controller action is executed.

What is ActionExecutingContext MVC?

ActionExecutingContext(ControllerContext, ActionDescriptor, IDictionary) Initializes a new instance of the ActionExecutingContext class by using the specified controller context, action descriptor, and action-method parameters.

How do I redirect OnActionExecuting in base controller?

Show activity on this post. public override void OnActionExecuting(ActionExecutingContext filterContext) { if (needToRedirect) { filterContext. Result = new RedirectResult(url); return; } } Instead of new RedirectResult(url) you could also use new RedirectToAction(string action, string controller) .

What is difference between OnActionExecuting and OnActionExecuted in MVC?

OnActionExecuting runs before the action method. OnActionExecuted runs after the action method and can perform additional processing, such as providing extra data to the action method, inspecting the return value, or canceling execution of the action method.

What is Actionfilterattribute in MVC?

Action Filter is an attribute that you can apply to a controller action or an entire controller. This filter will be called before and after the action starts executing and after the action has executed. Action filters implement the IActionFilter interface that has two methods OnActionExecuting andOnActionExecuted.

What is Actionfilterattribute in .NET core?

The Action Filter This ActionFilter inherits from Attribute (which allows us to use it as an attribute [ActionFilter]) and IActionFilter, which mandates we implement two methods, OnActionExecuted and OnActionExecuting. OnActionExecuted runs after the action has finished, while OnActionExecuting runs before.

Which filter execute first in MVC?

Authentication and authorization filters
as you can see from the below diagram, as soon as the controller starts execution through Action Invoker, Authentication and authorization filters are the very first filters to be triggered, followed by model binding which maps request and route data to action parameters.

What is ViewBag and ViewData?

ViewData is a dictionary of objects that is derived from ViewDataDictionary class and accessible using strings as keys. ViewBag is a dynamic property that takes advantage of the new dynamic features in C# 4.0. ViewData requires typecasting for complex data type and check for null values to avoid error.

What is the difference between ActionResult and ViewResult?

ActionResult is an abstract class. ViewResult derives from ActionResult. Other derived classes include JsonResult and PartialViewResult. You declare it this way so you can take advantage of polymorphism and return different types in the same method.

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