filters in asp.net mvc for Dummies

filters in asp.net mvc for Dummies

Blog Article

Overuse of filters may possibly increase the likelihood of minimize in efficiency and can also lead to assault surface.

The OnResultExecuting technique operates before the motion result's executed, so it could manipulate the motion consequence by means of ResultExecutingContext.Outcome. An OnResultExecuting system can small-circuit execution from the action end result and subsequent final result filters by setting ResultExecutingContext.

The kind of outcome getting executed is dependent upon the action in query. An MVC motion returning a look at would include all razor processing as A part of the ViewResult becoming executed. An API technique could possibly accomplish some serialization as Component of the execution of The end result. Learn more about action benefits

1 illustration in which you might will need a different method of mistake managing for various steps can be in an app that exposes both API endpoints and actions that return sights/HTML. The API endpoints could return error details as JSON, while the perspective-primarily based actions could return an mistake page as HTML.

Synchronous filters operate right before and soon after their pipeline phase. For example, OnActionExecuting is named prior to the motion technique is called. OnActionExecuted known as after the motion technique returns:

The purpose of the tutorial is to explain action filters. An motion filter is definitely an attribute you could utilize to some controller action -- or a complete controller -- that modifies the way in which by which the motion is executed.

Using this sample, there’s only one strategy to apply, and function can be carried out right before or once the action is executed by working it in advance of or following the contact to future. On the other hand, in case you’re small-circuiting the filter by environment a context.End result, you have to return without contacting upcoming (normally you’ll get an exception).

If we wish to monitor any kind of exception at enough time of code execution and afterwards return that exception information to the procedure from where a ask for has been raised, we need to use Exception filters.

The Controller class’s methods often operate before and In spite of everything filters. These approaches aren't implemented as IFilter situations and don't be involved in the IFilter purchasing algorithm.

Filters support both synchronous and asynchronous implementations through different interface definitions.

Perspective Title: It specifies The trail into the error see (~/Views/Shared/Error.cshtml). This makes sure that Any time an exception is taken care of by this filter, the user is redirected to a typical mistake site, preserving a steady error-handling system across the application.

As you'll be able to see, the filters in asp.net mvc ActionFilterAttribute course has four overload procedures. It involves the OnResultExecuted and also the OnResultExecuting strategies, which can be accustomed to execute tailor made logic in advance of or right after the result executes.

Timer Initialization: A Stopwatch instance is developed and started to measure the length of The end result’s execution. This is helpful for general performance checking.

Filters assist equally synchronous and asynchronous implementations by diverse interface definitions.