Object Caching

Caching is the technique for storing frequently used data on the server to fulfill subsequent requests. there are a lots of way to store data in cache. Object Caching is one of them. Object Cache stores data in simple name/value pairs.

To Use this we need to use System.Runtime.Caching namespace. this is introduced in .Net 4.0. 

here I'm going to create a simple example to store data in Object Cache.

first, you need to add a reference of System.Runtime.Caching object in your project.

To add value in Cache, create a function like this

        public void SetCache(object value, string key)

        {

            ObjectCache cache = MemoryCache.Default;

            cache.Add(key, value, DateTime.Now.AddDays(1));

        }

In the above code, the first line is used to reference to the default MemoryCache instance. Using the new .NET Caching runtime, you can have multiple MemoryCaches inside a single application.

In the next line we are adding the object to the cache along with a key. The key allows us to retrieve this when you want.

To Get the Cache object you can create a new function like below

        public string GetCache(string key)

        {

            ObjectCache cache = MemoryCache.Default;

            return (string)cache[key];

        }

You can create the above function more reusable

        static readonly ObjectCache Cache = MemoryCache.Default;

        /// <summary>

        /// get cached data

        /// </summary>

        /// <typeparam name="T">Type of cached data</typeparam>

        /// <param name="key">Name of cached data</param>

        /// <returns>Cached data as type</returns>

        public static T Get<T>(string key) where T : class

        {

            try

            {

                return (T)Cache[key];

            }

            catch

            {

                return null;

            }

        }

I am attaching a little class, which you can easily use in your projects to use Caching.

Download here