Simple C# ASP.NET Cache Implementation

I need to build up a List<object> and cache the list and be able to append to it. I also need to be able to blow it away easily and recreate it. What is a simple way to accomplish this?

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Answers:

Method 1

Method 2

Method 3

Answers:

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Method 1

Something like this perhaps?

using System;
using System.Collections.Generic;
using System.Web;

public class MyListCache
{
    private List<object> _MyList = null;
    public List<object> MyList {
        get {
            if (_MyList == null) {
                _MyList = (HttpContext.Current.Cache["MyList"] as List<object>);
                if (_MyList == null) {
                    _MyList = new List<object>();
                    HttpContext.Current.Cache.Insert("MyList", _MyList);
                }
            }
            return _MyList;
        }
        set {
            HttpContext.Current.Cache.Insert("MyList", _MyList);
        }
    }

    public void ClearList() {
        HttpContext.Current.Cache.Remove("MyList");
    }
}

As for how to use…..

// Get an instance
var listCache = new MyListCache();

// Add something
listCache.MyList.Add(someObject);

// Enumerate
foreach(var o in listCache.MyList) {
  Console.WriteLine(o.ToString());
}  

// Blow it away
listCache.ClearList();

Method 2

This Tutorial is what I found to be helpful

ASP.NET Caching Features

Here is a sample

List<object> list = new List<Object>();

Cache["ObjectList"] = list;                 // add
list = ( List<object>) Cache["ObjectList"]; // retrieve
Cache.Remove("ObjectList");                 // remove

Method 3

The caching parts of “Tracing and Caching Provider Wrappers for Entity Framework”, while not simple, are still a pretty good review of some useful things to think about with caching.

Specifically, the two classes InMemoryCache and AspNetCache and their associated tests:

Similar to what the question did, you could wrap HttpRuntime.Cache or HttpContext.Current.Items or HttpContext.Current.Cache in an implementation of ICache.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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