CacheHelper

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace Common
{
    /// <summary>
    /// 封装对缓存的操作！（对缓存的操作，最重要的就是取和存）
    /// </summary>
    public class CacheHelper
    {
        /// <summary>
        /// 根据缓存的key，从缓存中取数据。
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static object Get(string key)
        {
            System.Web.Caching.Cache cache = HttpRuntime.Cache;
            return cache[key];
        }
        /// <summary>
        /// 向缓存中，添加数据。
        /// </summary>
        /// <param name="key">缓存中的key</param>
        /// <param name="value">缓存的数据value</param>
        public static void Set(string key, object value)
        {
            System.Web.Caching.Cache cache = HttpRuntime.Cache;
            cache[key] = value;
        }
        /// <summary>
        /// 向缓存中添加数据，并且设置绝对过期时间
        /// </summary>
        /// <param name="key">缓存中的key</param>
        /// <param name="value">缓存的数据value</param>
        /// <param name="time">绝对过期时间</param>
        public static void Set(string key, object value, DateTime time)
        {
            System.Web.Caching.Cache cache = HttpRuntime.Cache;
            cache.Insert(key, value, null, time, TimeSpan.Zero);
        }
        /// <summary>
        ///  向缓存中添加数据，并且设置滑动过期时间
        /// </summary>
        /// <param name="key">缓存中的key</param>
        /// <param name="value">缓存的数据value</param>
        /// <param name="timeSpan">滑动过期时间（分钟）</param>
        public static void Set(string key, object value, int timeSpan)
        {
            System.Web.Caching.Cache cache = HttpRuntime.Cache;
            cache.Insert(key, value, null, DateTime.MaxValue, new TimeSpan(0, timeSpan, 0));
        }
        /// <summary>
        /// 移除缓存中的数据
        /// </summary>
        /// <param name="key"></param>        
        public static void Remove(string key)
        {
            System.Web.Caching.Cache cache = HttpRuntime.Cache;
            cache.Remove(key);
        }
    }
}