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Looking for a very simple Cache example

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没有蜡笔的小新
没有蜡笔的小新 2020-12-13 13:51

I\'m looking for a real simple example of how to add an object to cache, get it back out again, and remove it.

The second answer here is the kind of example I\'d lov

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  • 轮回少年
    轮回少年 (楼主)
    2020-12-13 14:27

    .NET provides a few Cache classes

    • System.Web.Caching.Cache - default caching mechanizm in ASP.NET. You can get instance of this class via property Controller.HttpContext.Cache also you can get it via singleton HttpContext.Current.Cache. This class is not expected to be created explicitly because under the hood it uses another caching engine that is assigned internally. To make your code work the simplest way is to do the following: 

      public class AccountController : System.Web.Mvc.Controller{ 
  public System.Web.Mvc.ActionResult Index(){
    List list = new List();

    HttpContext.Cache["ObjectList"] = list;                 // add
    list = (List)HttpContext.Cache["ObjectList"]; // retrieve
    HttpContext.Cache.Remove("ObjectList");                 // remove
    return new System.Web.Mvc.EmptyResult();
  }
}


    • System.Runtime.Caching.MemoryCache - this class can be constructed in user code. It has the different interface and more features like update\remove callbacks, regions, monitors etc. To use it you need to import library System.Runtime.Caching. It can be also used in ASP.net application, but you will have to manage its lifetime by yourself.
      


      var cache = new System.Runtime.Caching.MemoryCache("MyTestCache");
cache["ObjectList"] = list;                 // add
list = (List)cache["ObjectList"]; // retrieve
cache.Remove("ObjectList");                 // remove


    
      
             
      
                                                        
      
            
            
      
              
                
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