c#缓存

 /// <summary>

        /// 建立缓存

        /// </summary>

        public static object TryAddCache(string key, object value, CacheItemPriority priority)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, priority, null);

            else

                return null;

        }

 

        /// <summary>

        /// 建立定时不访问便移除的缓存

        /// </summary>

        public static object TryAddCache(string key, object value, TimeSpan slidingExpiration, CacheItemPriority priority)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, Cache.NoAbsoluteExpiration, slidingExpiration, priority, null);

            else

                return null;

        }

 

        /// <summary>

        /// 建立缓存，并在移除时执行事件

        /// </summary>

        public static object TryAddCache(string key, object value, DateTime absoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemovedCallback)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, absoluteExpiration, slidingExpiration, priority, onRemovedCallback);

            else

                return null;

        }

 

 

        /// <summary>

        /// 移除缓存

        /// </summary>

        public static object TryRemoveCache(string key)

        {

            if (HttpRuntime.Cache[key] != null)

                return HttpRuntime.Cache.Remove(key);

            else

                return null;

        }

 

        /// <summary>

        /// 移除键中带某关键字的缓存

        /// </summary>

        public static void RemoveMultiCache(string keyInclude)

        {

            IDictionaryEnumerator CacheEnum = HttpRuntime.Cache.GetEnumerator();

            while (CacheEnum.MoveNext())

            {

                if (CacheEnum.Key.ToString().IndexOf(keyInclude.ToString()) >= 0)

                    HttpRuntime.Cache.Remove(CacheEnum.Key.ToString());

            }

        }

 

        /// <summary>

        /// 移除所有缓存

        /// </summary>

        public static void RemoveAllCache()

        {

            IDictionaryEnumerator CacheEnum = HttpRuntime.Cache.GetEnumerator();

            while (CacheEnum.MoveNext())

            {

                HttpRuntime.Cache.Remove(CacheEnum.Key.ToString());

            }

        }

using System;

using System.Collections.Generic;

using System.Text;

using System.Collections;

using System.Web;

using System.Web.Caching;

 

namespace BLL

{

    public class Caches

    {

        /// <summary>

        /// 建立缓存

        /// </summary>

        public static object TryAddCache(string key, object value, CacheItemPriority priority)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration, priority, null);

            else

                return null;

        }

 

        /// <summary>

        /// 建立定时不访问便移除的缓存

        /// </summary>

        public static object TryAddCache(string key, object value, TimeSpan slidingExpiration, CacheItemPriority priority)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, Cache.NoAbsoluteExpiration, slidingExpiration, priority, null);

            else

                return null;

        }

 

        /// <summary>

        /// 建立缓存，并在移除时执行事件

        /// </summary>

        public static object TryAddCache(string key, object value, DateTime absoluteExpiration, TimeSpan slidingExpiration, CacheItemPriority priority, CacheItemRemovedCallback onRemovedCallback)

        {

            if (HttpRuntime.Cache[key] == null && value != null)

                return HttpRuntime.Cache.Add(key, value, null, absoluteExpiration, slidingExpiration, priority, onRemovedCallback);

            else

                return null;

        }

 

 

        /// <summary>

        /// 移除缓存

        /// </summary>

        public static object TryRemoveCache(string key)

        {

            if (HttpRuntime.Cache[key] != null)

                return HttpRuntime.Cache.Remove(key);

            else

                return null;

        }

 

        /// <summary>

        /// 移除键中带某关键字的缓存

        /// </summary>

        public static void RemoveMultiCache(string keyInclude)

        {

            IDictionaryEnumerator CacheEnum = HttpRuntime.Cache.GetEnumerator();

            while (CacheEnum.MoveNext())

            {

                if (CacheEnum.Key.ToString().IndexOf(keyInclude.ToString()) >= 0)

                    HttpRuntime.Cache.Remove(CacheEnum.Key.ToString());

            }

        }

 

        /// <summary>

        /// 移除所有缓存

        /// </summary>

        public static void RemoveAllCache()

        {

            IDictionaryEnumerator CacheEnum = HttpRuntime.Cache.GetEnumerator();

            while (CacheEnum.MoveNext())

            {

                HttpRuntime.Cache.Remove(CacheEnum.Key.ToString());

            }

        }

    }

}