我怎样才能在一个控制台应用程序中使用的System.Web.Caching.Cache？ [英] How can I use System.Web.Caching.Cache in a Console application?

问题描述

上下文：3.5的.Net，C＃
我想有缓存机制在我的控制台应用程序。
而不是重新发明轮子，我想使用的System.Web.Caching.Cache （这是最后的决定，我不能用其他的缓存框架，不要问为什么）。
不过，它看起来像的System.Web.Caching.Cache 应该只在一个有效的HTTP上下文中运行。我非常简单的代码段看起来是这样的：

Context: .Net 3.5, C#
I'd like to have caching mechanism in my Console application.
Instead of re-inventing the wheel, I'd like to use System.Web.Caching.Cache (and that's a final decision, I can't use other caching framework, don't ask why).
However, it looks like System.Web.Caching.Cache is supposed to run only in a valid HTTP context. My very simple snippet looks like this:

using System;
using System.Web.Caching;
using System.Web;

Cache c = new Cache();

try
{
    c.Insert("a", 123);
}
catch (Exception ex)
{
    Console.WriteLine("cannot insert to cache, exception:");
    Console.WriteLine(ex);
}

和的结果是：

cannot insert to cache, exception:
System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Web.Caching.Cache.Insert(String key, Object value)
   at MyClass.RunSnippet()

所以，很显然，我在这里做了什么。任何想法？

So obviously, I'm doing something wrong here. Any ideas?

---

更新：+1大多数的​​答案，通过静态方法获取缓存是正确的用法，即 HttpRuntime.Cache 和 HttpContext.Current.Cache 。谢谢大家！

Update: +1 to most answers, getting the cache via static methods is the correct usage, namely HttpRuntime.Cache and HttpContext.Current.Cache. Thank you all!

推荐答案

的说明文件缓存构造说，这是仅供内部使用。为了让您的高速缓存对象，调用HttpRuntime.Cache而不是通过构造函数创建一个实例。

The documentation for the Cache constructor says that it is for internal use only. To get your Cache object, call HttpRuntime.Cache rather than creating an instance via the constructor.

这篇关于我怎样才能在一个控制台应用程序中使用的System.Web.Caching.Cache？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！