how to use MemoryCache Class to cache and get a list in asp.net core

Question

I can get a cached object by creating an instance of IMemoryCache class like this:

_memoryCache.Get<Users>(id);

How can I get a list of Users using this class?
How do I cache the list if it was not cached?

You can find how to do it here: learn.microsoft.com/en-gb/aspnet/core/performance/caching/… — Jacek Ratajewski
– Jacek Ratajewski, Commented Sep 2, 2021 at 6:34

Dharman · Accepted Answer · 2021-09-02 06:51:51Z

3

You can use the TryGetValue method that returns the cached object as an output parameter. Refer the example below:-

List<User> users;
string key = "usersCacheKey";
//TryGetValue will get the item from cache and assign it to users variable.
//It will return false if item is not found.
if(!_memoryCache.TryGetValue<List<User>>(key, out users){
  //item not found in cache. set the cache item here
  users = new List<User>();
  _memoryCache.Set<List<User>>(key, users);
}

Reference below link(s) fro more information on how to use Memory Caching in ASP.NET Core 5.0:- Cache in-memory in ASP.NET Core

edited Sep 2, 2021 at 6:51

Dharman♦

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answered Sep 2, 2021 at 6:46

Vineet Desai

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