.NET自带缓存机制实例

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

namespace SZRPP.Common
{
    /// <summary>
    /// 缓存相关的操作类
    /// </summary>
    public class DataCache
    {
        /// <summary>
        /// 获取当前应用程序指定CacheKey的Cache值
        /// </summary>
        /// <param name="CacheKey"></param>
        /// <returns></returns>
        public static object GetCache(string CacheKey)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            return objCache[CacheKey];
        }

        /// <summary>
        /// 设置当前应用程序指定CacheKey的Cache值
        /// </summary>
        /// <param name="CacheKey"></param>
        /// <param name="objObject"></param>
        public static void SetCache(string CacheKey, object objObject)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            if (objObject!=null)
                objCache.Insert(CacheKey, objObject, null, DateTime.UtcNow.AddDays(7), TimeSpan.Zero);
        }

        /// <summary>
        /// 设置当前应用程序指定CacheKey的Cache值
        /// </summary>
        /// <param name="CacheKey"></param>
        /// <param name="objObject"></param>
        public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration,TimeSpan slidingExpiration )
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject,null,absoluteExpiration,slidingExpiration);
        }
        /// <summary>
        /// 根据依赖项设置缓存
        /// </summary>
        /// <param name="CacheKey"></param>
        /// <param name="objObject"></param>
        /// <param name="cdep"></param>
        /// <param name="absoluteExpiration"></param>
        /// <param name="slidingExpiration"></param>
        public static void SetCache(string CacheKey, object objObject, CacheDependency cdep, DateTime absoluteExpiration, TimeSpan slidingExpiration)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            objCache.Insert(CacheKey, objObject, cdep, absoluteExpiration, slidingExpiration);
        }
        /// <summary>
        /// 移除当前应用程序指定CacheKey的Cache值
        /// </summary>
        /// <param name="CacheKey"></param>
        public static void RemoveCache(string CacheKey)
        {
            System.Web.Caching.Cache objCache = HttpRuntime.Cache;
            IDictionaryEnumerator enumerator = HttpRuntime.Cache.GetEnumerator();
            while (enumerator.MoveNext())
            {
                if (enumerator.Key.ToString().IndexOf(CacheKey, System.StringComparison.Ordinal) >= 0)
                    objCache.Remove(enumerator.Key.ToString());
            }
            
        }
        /// <summary>
        ///  移除当前应用程序所有缓存
        /// </summary>
        public static void RemoveCache()
        {

            // retrieve application Cache enumerator
            IDictionaryEnumerator enumerator = HttpRuntime.Cache.GetEnumerator();
            // copy all keys that currently exist in Cache
            while (enumerator.MoveNext())
            {
                HttpRuntime.Cache.Remove(enumerator.Key.ToString());
            }
              
        }
        
    }
}