Implement Custom Cache Dependencies in ASP.NET 1.x

摘要

One of the most compelling improvements that ASP.NET brought to ASP programming was the Cache object. The Cache has some similarities to the Application object and is a container of global data (as opposed to session-specific data) that features a fair number of innovative characteristics. At its core, the ASP.NET Cache is a sealed data container class built around a hashtable and defined in the System. Web. Caching namespace. The Cache object is central to the whole ASP.NET infrastructure. Various runtime components use the ASP.NET Cache to store working data. For example, the output of cached pages and controls is stored there. Likewise, applications that keep session state in memory use the ASP.NET Cache to store it. The Cache object is made up of two independent data stores―a public and a private cache. The private cache is reserved for system components and is accessed through a private API. The public cache is the one that is available to developers. In order to enable you to loop through the public store, the Cache class implements the IEnumerable interface.