Caching a string for 24 hours

Question

I am trying to cache a string in my .net mvc application for 24 hours. I am having trouble finding a way to get the cache to expire. Currently I set the cache using

System.Runtime.Caching.MemoryCache.Default["activeKey"] = "success";

I use the cache by calling

var activeKey = System.Runtime.Caching.MemoryCache.Default["activeKey"];
if (activeKey != null && (string) activeKey == "success")
{
    return true;
}

However, I am unsure where to go from here as far as cache. I found docs for sliding and absolute cache, but am unsure exactly what to do.

have you checked this : https://msdn.microsoft.com/en-us/library/aa478965.aspx?f=255&MSPPError=-2147217396 — Ehsan Sajjad, Apr 03 '18 at 13:49
`class HackItCacheItem { public DateTime Created {get;set;} public string Value {get;set;} }` if DateTime.Now - Created > TimeSpan.FromDays(1) ... — , Apr 03 '18 at 13:50
I think you need to use `Add()`, it has an overload for CacheItemPolicy — maccettura, Apr 03 '18 at 13:50
https://stackoverflow.com/questions/1434284/when-does-asp-net-remove-expired-cache-items — , Apr 03 '18 at 13:51

Patrick Hofman · Accepted Answer · 2018-04-03T13:59:54.697

2

The Add or AddOrGetExisting methods are the best you can get. They both have an argument to set the expiration (absoluteExpiration).

System.Runtime.Caching.MemoryCache.Default.Add(
    "activeKey",
    "success",
    new DateTimeOffset(DateTime.Now.AddDays(1))
)

edited Apr 03 '18 at 13:59

answered Apr 03 '18 at 13:57

Patrick Hofman

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With this it says the add method needs 7 parameters – TheDizzle Apr 03 '18 at 13:58
Not according to the documentation... Weird. – Patrick Hofman Apr 03 '18 at 13:59
Ah that would do it, no prefix – TheDizzle Apr 03 '18 at 14:03
Does this apply the cache for everyone? not just session based. – TheDizzle Apr 03 '18 at 14:18
1

Yes, the cache is application-wide. – Patrick Hofman Apr 03 '18 at 14:19

Caching a string for 24 hours

1 Answers1