CacheHelper.cs(20170223)

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

namespace System.CRM.Common
{
    /// <summary>
    /// 缓存操作助手类
    /// </summary>
    public class CacheHelper
    {
        /// <summary>
        /// 获取数据缓存
        /// </summary>
        /// <param name="key">Cache的Key值</param>
        public static object GetCache(string key)
        {
            return HttpRuntime.Cache.Get(key);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        /// <param name="key">Cache的Key值</param>
        /// <param name="value">Cache的Value值</param>
        public static void SetCache(string key, object value)
        {
            HttpRuntime.Cache.Insert(key, value);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        /// <param name="key">Cache的Key值</param>
        /// <param name="value">Cache的Value值</param>
        /// <param name="timeout">最后一次访问Cache超过该时间间隔，则该Cache会被移除</param>
        public static void SetCache(string key, object value, TimeSpan timeout)
        {
            Cache objCache = HttpRuntime.Cache;
            objCache.Insert(key, value, null, DateTime.MaxValue, timeout, CacheItemPriority.NotRemovable, null);
        }

        /// <summary>
        /// 设置数据缓存
        /// </summary>
        /// <param name="key">Cache的Key值</param>
        /// <param name="value">Cache的Value值</param>
        /// <param name="absolute">超时时间（单位：天）</param>
        /// <param name="timeout">最后一次访问Cache超过该时间间隔，则该Cache会被移除</param>
        public static void SetCache(string key, object value, double absolute, TimeSpan timeout)
        {
            Cache objCache = HttpRuntime.Cache;
            objCache.Insert(key, value, null, DateTime.UtcNow.AddDays(absolute), timeout);
        }

        /// <summary>
        /// 移除指定数据缓存
        /// </summary>
        /// <param name="key">Cache的Key值</param>
        public static void RemoveCache(string key)
        {
            HttpRuntime.Cache.Remove(key);
        }

        /// <summary>
        /// 移除全部缓存
        /// </summary>
        public static void RemoveAllCache()
        {
            Cache cache = HttpRuntime.Cache;
            IDictionaryEnumerator ide = cache.GetEnumerator();
            while (ide.MoveNext())
            {
                cache.Remove(ide.Key.ToString());
            }
        }
    }

}