Trying to use Caching in C#

Question

I am trying yo use caching data as per my project demands

So i coded below

   public static void Add<T>(T o, string key, double Timeout)
    {
        HttpContext.Current.Cache.Insert(
            key,
            o,
            null,
            DateTime.Now.AddHours(Timeout),
            System.Web.Caching.Cache.NoSlidingExpiration);
    }

now , i am calling a this function like

CacheHelper.Add<Employee>(new Employee() { Id = "1", name = "1"  }, "Employee", 10000);

By doing above i am getting Error:

"An unhandled exception of type 'System.NullReferenceException'"

My guess is that you don't have a current HttpContext (`HttpContext.Current` is null). Is your code executed in the context of a HTTP request? — Fredrik Mörk, Dec 04 '13 at 10:03
Why aren't you just using a generic cache that isn't bound to `HttpContext`? — aevitas, Dec 04 '13 at 10:08

score 0 · Answer 1 · answered Dec 04 '13 at 10:03

0

You need to debug your application. Something is null and you need to find out what.

My personal guess goes to HttpContext.Current being null.

answered Dec 04 '13 at 10:03

nvoigt

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score 0 · Accepted Answer · answered Dec 04 '13 at 10:03

0

You may use this code only in Http request pipeline procees. Otherwise HttpContext.Current will be null.

answered Dec 04 '13 at 10:03

Dmytro Rudenko

2,524
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Trying to use Caching in C#

2 Answers2