The outputCache, inbuilt action
filter in MVC, enables you to cache the action result content by a MVC
controller action. By default MVC Output cache is enabled. So for this you
don’t need to do anything, if client will send same request, browser will not forward
request to MVC controller and it returns previous cached result.
There are few major properties of
OutPutCache attribute
·
Location
·
NoStore
·
Duration
·
VaryByParm
·
VaryByHeader
OutPutCache
Location:
The output cache can be located
on the browser client (where the request originated), on a proxy server (or any
other server) participating in the request, or on the server where the request
was processed. There are following possible values for output cache location
and default value is ‘ANY’.
- Any - the output cache can be located on client
browser, proxy server.
- Client - Cache will be stored on client browser as
private.
- Downstream - The output cache will be stored in any
HTTP 1.1 cache-capable devices other than the origin server
- None - The output cache will be disabled
- Server - The output cache will be stored on the
server where request was handled and processed.
- ServerAndClient – the output cache will be stored on
both server and client browser.
Here
is an example, output cache location is Client.
public class HomeController : Controller
{
[OutputCache(NoStore = true, Duration
= 0, VaryByParam = "*", Location = System.Web.UI.OutputCacheLocation.Client)]
public ActionResult LoadInfo(int pageNumber)
{
List<Info>
infos = new List<Info>();
for (int i =
0; i < 10; i++)
{
int ivalue
= rand.Next();
Info info
= new Info()
{
Header
= "Header" + ivalue,
InfoBody
= "Body",
};
infos.Add(info);
}
return PartialView("_Info", infos);
}
}
OutputCache
NoStore:
NoStore is Boolean property,
which tells that cache value will be stored or not. Default value is true.If
NoStore value is true, it prevent the caching your data.
OutputCache Duration:
It tell the time duration (in
second) that the cache data is stored.
OutputCache
VaryByParm:
This property enables you to
create different cached versions of the very same content when a form parameter
or query string parameter varies.
- VaryByParam = “City,CustomerID” :
It creates different
cached versions whenever any of the form or query string parameters in the list
“City, CustomerID” varies.
public ActionResult GetCustomerInfo(int customerID, string city)
{
}
- VaryByParam = "none" :
If you
don’t want to store the Cache data, set VaryByParam = "none" it never
cache data and always calls to repository to get data from database.
[OutputCache(NoStore = true, Duration = 0, VaryByParam = "none", Location =
System.Web.UI.OutputCacheLocation.Client)]
public ActionResult GetCustomerInfo(int customerID, string city)
{
}
- VaryByParam = "*" :
It create
a different cached version, whenever a form or query string parameters varies
[OutputCache(NoStore = true, Duration = 0,
VaryByParam = "*", Location = System.Web.UI.OutputCacheLocation.Client)]
public ActionResult GetCustomerInfo(int customerID, string city)
{
}
Other related topics
- ASP.NET MVC how to disable Caching
- Ajax Get method not hitting the
ASP.NET MVC Controllers
- Asp.net MVC view not refreshing after
postback
- OutPutCache Action Filter in ASP.NET MVC
Thanks for visiting!!
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