What is OutputCache?

The output cache enables you to cache the content returned by a controller action. That way, the same content does not need to be generated each and every time the same controller action is invoked. Imagine, for example, that your ASP.NET MVC application displays a list of database records in a view named Index.

How do you cache web API output?

  1. Now we need to implement our own caching class that will be derived from the ActionFilterAttribute class.
  2. Step 2: Set the properties for the class:
  3. Step 3: Set the following constructor in the class:
  4. Step 4: Check whether or not the request should be cached.
  5. Step 5: Function to enable client-side caching.

Can we do caching in web API?

Caching is very common to make applications performant and scalable. If a result is already computed by the application, it is cached in a store so that next time when the same request comes, cached result can be fetched instead of processing the request again.

What is the use of OutputCache attribute in MVC?

In ASP.NET MVC, there is an OutputCache filter attribute that you can apply and this is the same concept as output caching in web forms. The output cache enables you to cache the content returned by a controller action. Output caching basically allows you to store the output of a particular controller in the memory.

What is VaryByParam OutputCache?

VaryByParam property creates a different cache, which is based upon the parameter value and is passed through Query String or Request. Form. If we want to have same type of OutputCache properties on multiple Action method or multiple controller, then we can use CacheProfile property.

What is the purpose of ViewBag property?

The Microsoft Developer Network writes that the ViewBag property allows you to share values dynamically to the view from the controller. As such, it is considered a dynamic object without pre-set properties.

Where is output cache stored?

The output cache is located on the Web server where the request was processed. This value corresponds to the Server enumeration value. The output cache can be stored only at the origin server or at the requesting client. Proxy servers are not allowed to cache the response.

How do I caching in restful web services?

Cache-Control Header Indicates that resource is cacheable by any component. Indicates that resource is cacheable only by the client and the server, no intermediary can cache the resource. Indicates that a resource is not cacheable. Indicates the caching is valid up to max-age in seconds.

What is VaryByParam?

The VaryByParam is a semicolon-delimited set of parameters used to vary the cached output. It allows varying the cached output by GET query string or form POST parameters.

Where is ViewBag stored?

ViewBag lives within the current context. IN ASP.NET the context is all the objects required to fulfill an HTTP request. Session is a state management framework in ASP.NET. Session is stored in the server in memory for a variable duration.

How do you send ViewBag from controller view?

To pass the strongly typed data from Controller to View using ViewBag, we have to make a model class then populate its properties with some data and then pass that data to ViewBag with the help of a property. And then in the View, we can access the data of model class by using ViewBag with the pre-defined property.

What are the caching types for web APIs?

There are 3 types of cache available,

  • In-Memory Cache – The data are cached in the server’s memory.
  • Persistent in-process Cache – The data are cached in some file or database.
  • Distributed Cache – The data are cached in shared cache and multiple processes. Example: Redis cache.

What types of caching exists for Web APIs?

Edge caching or CDN. Database caching. Server caching (API caching) Browser caching.

Why REST APIs are stateless?

A. REST APIs are stateless because, rather than relying on the server remembering previous requests, REST applications require each request to contain all of the information necessary for the server to understand it. Storing session state on the server violates the REST architecture’s stateless requirement.

What is caching in Web API?

Caching is the technique of storing the data which are frequently used. Those data can be served faster for any future or subsequent requests by eliminating the unnecessary requests to external data sources.

What is the use of VaryByParam attribute in OutputCache directive?

ANSWER: The VaryByParam attribute determines which versions of the page output are actually cached.

What is Result Filter in MVC?

Result filters are executed before or after generating the result for an action. The Action Result type can be ViewResult, PartialViewResult, RedirectToRouteResult, which derives from the ActionResult class. Example: public interface IResultFilter.

Can ViewBag store an object?

ViewBag object allows you to store values using object-properties syntax.

How do you pass data from controller to view without ViewBag?

The other way of passing the data from Controller to View can be by passing an object of the model class to the View. Erase the code of ViewData and pass the object of model class in return view. Import the binding object of model class at the top of Index View and access the properties by @Model.

Why ViewBag is used in MVC?

The ViewBag in ASP.NET MVC is used to transfer temporary data (which is not included in the model) from the controller to the view. Internally, it is a dynamic type property of the ControllerBase class which is the base class of the Controller class.

How to enable outputcache in web API?

WebAPI does not have any built in support for the [OutputCache] attribute. Take a look at this article to see how you could implement this feature yourself. Show activity on this post. The answer of Aliostad states that Web API turns off caching, and the code of HttpControllerHandler shows that it does WHEN response.Headers.CacheControl is null.

What is the output-cache provider?

Provides programmatic access to the output-cache providers that are specified in the configuration file for a Web site. Output caching stores the generated output of pages, controls, and HTTP responses in memory.

How do I control where content is cached in [outputcache]?

By default, when you use the [OutputCache] attribute, content is cached in three locations: the web server, any proxy servers, and the web browser. You can control exactly where content is cached by modifying the Location property of the [OutputCache] attribute. You can set the Location property to any one of the following values:

What is outputcache in MVC?

Output caching provides you with a very easy method of dramatically improving the performance of your ASP.NET MVC applications. In this tutorial, you learned how to use the [OutputCache] attribute to cache the output of controller actions.