System.Web.Caching.Cache 方法汇总

在做后台的时候，想着把所有栏目放到缓存里，就这里了一个类。必然是有缺陷，暂时没有实现滑动缓存

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

namespace WebCore.UI.Common
{
    public class Cache
    {
        private static System.Web.Caching.Cache _cache;
        public const int DayFactor = 0x4380;
        private static int Factor = 5;
        public const int HourFactor = 720;
        public const int MinuteFactor = 12;
        public const double SecondFactor = 0.2;
        static Cache()
        {
            HttpContext current = HttpContext.Current;
            if (current != null)
            {
                _cache = current.Cache;
            }
            else
            {
                _cache = HttpRuntime.Cache;
            }
        }

        private Cache()
        {
        }
        public static void Clear()
        {
            IDictionaryEnumerator enumerator = _cache.GetEnumerator();
            ArrayList list = new ArrayList();
            while (enumerator.MoveNext())
            {
                list.Add(enumerator.Key);
            }
            foreach (string str in list)
            {
                _cache.Remove(str);
            }
        }

        public static object Get(string key)
        {
            return _cache[key];
        }

        public static void Insert(string key, object obj)
        {
            Insert(key, obj, null, 1);
        }

        public static void Insert(string key, object obj, int seconds)
        {
            Insert(key, obj, null, seconds);
        }

        public static void Insert(string key, object obj, CacheDependency dep)
        {
            Insert(key, obj, dep, 0x21c0);
        }

        public static void Insert(string key, object obj, int seconds, CacheItemPriority priority)
        {
            Insert(key, obj, null, seconds, priority);
        }

        public static void Insert(string key, object obj, CacheDependency dep, int seconds)
        {
            Insert(key, obj, dep, seconds, CacheItemPriority.Normal);
        }

        public static void Insert(string key, object obj, CacheDependency dep, int seconds, CacheItemPriority priority)
        {
            if (obj != null)
            {
                _cache.Insert(key, obj, dep, DateTime.Now.AddSeconds((double)(Factor * seconds)), TimeSpan.Zero, priority, null);
            }
        }

        public static void Max(string key, object obj, CacheDependency dep)
        {
            if (obj != null)
            {
                _cache.Insert(key, obj, dep, DateTime.MaxValue, TimeSpan.Zero, CacheItemPriority.AboveNormal, null);
            }
        }

        public static void MicroInsert(string key, object obj, int secondFactor)
        {
            if (obj != null)
            {
                _cache.Insert(key, obj, null, DateTime.Now.AddSeconds((double)(Factor * secondFactor)), TimeSpan.Zero);
            }
        }

        public static void Remove(string key)
        {
            _cache.Remove(key);
        }

        public static void RemoveByPattern(string pattern)
        {
            IDictionaryEnumerator enumerator = _cache.GetEnumerator();
            Regex regex = new Regex(pattern, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase);
            while (enumerator.MoveNext())
            {
                if (regex.IsMatch(enumerator.Key.ToString()))
                {
                    _cache.Remove(enumerator.Key.ToString());
                }
            }
        }

        public static void ReSetFactor(int cacheFactor)
        {
            Factor = cacheFactor;
        }

        public static int SecondFactorCalculate(int seconds)
        {
            return Convert.ToInt32(Math.Round((double)(seconds * 0.2)));
        }
    }
}

 

使用方法

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

namespace WebCore.UI.Common
{

    public class SetSysMenuCache
    {
        private const string SiteSettingsCacheKey = "FileCache-SysLeftMenus";
        
        public string  ReadCache(bool cacheable,string Uid,Func<string> GetData)
        {
            string str = "";
             str = Cache.Get(Uid + "-" + SiteSettingsCacheKey) as string;
             if (str == null || str == "")
            {
                //缓存不存在
                if (cacheable)
                {
                    if (GetData!=null)
                    {
                      str=GetData();
                    }
                }
            }
           
            return str;
        }
        public void CreatCache(string Datas,string Uid)
        {
            Cache.Insert(Uid + "-" + SiteSettingsCacheKey, Datas,3600);
        }
        public void UpdateCache(string Datas, string Uid)
        {
            Cache.Remove(Uid + "-" + SiteSettingsCacheKey);
            CreatCache(Datas, Uid);
        }
    }
}