The 5-Second Trick For filters in asp.net mvc

The 5-Second Trick For filters in asp.net mvc

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Overuse of filters could maximize the chances of decrease in functionality and may also produce attack floor.

To utilize middleware like a filter, create a kind having a Configure method that specifies the middleware to inject into the filter pipeline. The subsequent illustration makes use of middleware to established a response header:

In OnResourceExecuting, if the result is presently in the static dictionary cache, The end result home is about on context, plus the action short-circuits and returns While using the cached consequence.

ResultExecutedContext.Exception is set to a non-null value In the event the action outcome or a subsequent result filter threw an exception. Location Exception to null correctly handles an exception and helps prevent the exception from becoming thrown again afterwards inside the pipeline.

Begin a Timer: It initializes and starts the Stopwatch to evaluate the duration of the action’s execution. This is very important for logging the action’s execution time.

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Eventually, you discovered tips on how to carry out a straightforward action filter. We made a Log motion filter that logs the levels of processing a controller motion to your Visible Studio Output window.

The OnActionExecuting approach operates ahead of the action process, so it could possibly manipulate the inputs to the motion by switching ActionExecutingContext.ActionArguments or manipulate the controller via ActionExecutingContext.Controller. An OnActionExecuting approach can shorter-circuit execution of your motion technique and filters in asp.net mvc subsequent action filters by environment ActionExecutingContext.

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At last, let’s make a controller and an motion strategy to return a textual content indicating time at which the material was generated. Also, Enable’s decorate the controller With all the CacheResource attribute we just produced.

The filter pipeline is usually small-circuited by placing The end result property about the ResourceExecutingContext parameter presented to your filter method. Such as, the subsequent Source filter prevents the remainder of the pipeline from executing:

If not, it will eventually get in touch with the synchronous interface’s technique(s). When you were being to apply equally interfaces on a person course, just the async method could be referred to as with the framework. Also, it doesn’t make any difference no matter whether your action is async or not, your filters could be synchronous or async impartial on the action.

In photo below I have three choices. I would filter by each selection, separately or by combination of two or with all three.

Filters guidance each synchronous and asynchronous implementations by distinct interface definitions.