Question about ASP.NET Cache class

Question

I would like to use Cache for my web application.

Here is the question

I found this link, http://msdn.microsoft.com/en-us/library/18c1wd61.aspx

For that link, all the example use something like Cache["KeyName"]="blah blah blah";

When I try to do the same thing, I have an error message, said "using System.Web.Caching.Cache is a type but used like a variable"

What should I do?

Do I have to create an instance?

My Example

string test = "123";
  if (HttpContext.Cache["test"] != null)
    test = (string)HttpContext.Cache["test"];
else
    HttpContext.Cache["test"] = test;

Kelsey · Accepted Answer · 2011-08-31 20:35:48Z

4

I think you are getting some overlap of naming. Be explicit and see if it works:

HttpContext.Current.Cache["KeyName"]="blah blah blah";

You can also do the following in your ASP.NET codebehind:

Page.Cache["KeyName"]="blah blah blah";

or

this.Cache["KeyName"]="blah blah blah";

Cache is handled by ASP.NET so you just have to use it, not create it.

EDIT: In ASP.NET MVC you can use the following in your controller:

HttpContext.Cache["KeyName"]="blah blah blah";

edited Aug 31, 2011 at 20:35

answered Aug 31, 2011 at 20:14

Kelsey

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6 Comments

HorseKing Over a year ago

Thank you for your reply. But Why I don't have HttpContext.Current.Cache? I have HttpContext.Cache instead...

Kelsey Over a year ago

@user361022 where are you trying to access the Cache from? An aspx page's codebind or a class file?

TheCodeKing Over a year ago

It's because Cache spans multiple requests. Current refers only to the current request, which has it's own request based Cache (Items).

HorseKing Over a year ago

I am using MVC3. Just trying to do the simplest cache example.

Kelsey Over a year ago

@user361022 That is odd since it should be accessible out of the box with HttpContext.Current.Cache in the System.Web namespace. As longs as you have an active context going (that is what HttpContext.Current is getting) then you should be able to access it.

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Daniel A. White · Accepted Answer · 2011-08-31 20:14:01Z

1

You don't have to create an instance. ASP.NET does it for you automatically.

Use the HttpContext.Current.Cache.

answered Aug 31, 2011 at 20:14

Daniel A. White

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