One or more filters may also applied to a person action strategy. The following filter utilized only on the Index() motion approach.
The OnResultExecuting system runs prior to the action result's executed, so it may manipulate the motion outcome by ResultExecutingContext.Outcome. An OnResultExecuting process can quick-circuit execution with the motion outcome and subsequent consequence filters by setting ResultExecutingContext.
The filter attribute has the Purchase assets that may be employed to deal with the orders. The purchase needs to be the order the business enterprise approach to be followed.
ResultExecutedContext.Exception is about to the non-null benefit If your action consequence or possibly a subsequent final result filter threw an exception. Placing Exception to null efficiently handles an exception and stops the exception from getting thrown again later in the pipeline.
In this manner, you can make your CustomAuthorize filter attribute both by applying the IAuthorizationFilter interface or by inheriting and overriding the above methods of the AuthorizeAttribute class.
Result filters can run code straight away ahead of and once the execution of personal motion success. They run only if the motion technique has executed productively.
As soon as the MVC middleware requires in excess of, it phone calls into several different filters at distinct factors inside of its motion invocation pipeline.
This attribute can then be placed on Those people steps that should execute model validation by including [ValidateModel] to the action strategy. Note that placing The end result house within the MotionExecutingContext will small-circuit the ask for.
One fantastic use circumstance filters in asp.net mvc for a useful resource filter is output caching. The filter can Examine the cache and return the cached end result firstly from the pipeline. If the cache isn’t yet populated, the filter can insert the response through the action into the cache at the conclusion of the pipeline.
This check is vital due to the fact only action effects really should be cached. If it is an ActionResult, it truly is extra into the cache with the earlier generated crucial. The cache entry is set to expire dependant on _expirationTimeSpan.
You may override the built-in ResultFilterAttribute to produce outcome filters. The AddHeaderAttribute course demonstrated earlier mentioned is undoubtedly an illustration of a consequence filter.
Sometimes you ought to complete logic either before an action method known as or soon after an action system runs.
// do a little something prior to the motion executes await subsequent(); // do a little something after the motion executes
Filters assistance both equally synchronous and asynchronous implementations via unique interface definitions.