封装好的缓存类代码,CSharp代码库,德仔网

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【CSharp】封装好的缓存类
作者:lybwwp / 发布于2014/1/26/ 509
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Admin.Helper
{
  /// <summary>
  /// .net 本身自带的cache相关方法
  /// </summary>
  public static class CacheHelper
  {
    /// <summary>
    /// fileds
    /// </summary>
    private static System.Web.Caching.Cache ObjCache = System.Web.HttpRuntime.Cache;

    #region Exist方法
    /// <summary>
    /// 判断指定Key的缓存是否存在
    /// </summary>
    /// <param name="Key"></param>
    /// <returns></returns>
    public static bool Exist(string Key)
    {
      if (ObjCache[Key] == null)
      {
        return false;
      }
      return true;
    }
    #endregion

    #region Get方法
    /// <summary>
    /// 获得指定Key的缓存对象
    /// </summary>
    /// <param name="Key"></param>
    /// <returns></returns>
    public static Object Get(string Key)
    {
      object objkey = null;
      if (ObjCache[Key] != null)
      {
        objkey = ObjCache.Get(Key);
      }
      return objkey;
    }
    #endregion

    #region Set方法

    /// <summary>
    /// 设置缓存
    /// </summary>
    /// <param name="Key">Cache Key</param>
    /// <param name="expiry">缓存时间</param>
    /// <param name="obj">缓存对象</param>
    public static void Set(string Key, DateTime expiry, object obj)
    {
      if (ObjCache[Key] != null)
      {
        ObjCache.Remove(Key);
      }

      ObjCache.Insert(Key, obj, null, expiry, TimeSpan.Zero);
    }

    /// <summary>
    /// 设置缓存
    /// </summary>
    /// <param name="Key">Cache Key</param>
    /// <param name="min">缓存时间【分钟】</param>
    /// <param name="obj">缓存对象</param>
    public static void Set(string Key, int min, object obj)
    {
      double douNum = double.Parse(min.ToString());
      Set(Key, DateTime.Now.AddMinutes(douNum), obj);
    }
    #endregion

    #region Del方法

    /// <summary>
    /// 删除指定Key的缓存
    /// </summary>
    /// <param name="Key"></param>
    public static void Del(string Key)
    {
      if (ObjCache[Key] != null)
      {
        ObjCache.Remove(Key);
      }
    }
    #endregion

    #region 其他

    /// <summary>
    /// 获取缓存中的项数
    /// </summary>
    public static int Count
    {
      get
      {
        return ObjCache.Count;
      }
    }

    /// <summary>
    /// 获取可用于缓存的千字节数
    /// </summary>
    public static long PrivateBytes
    {
      get
      {
        return ObjCache.EffectivePrivateBytesLimit;
      }
    }
    #endregion
  }
}







<pre code_snippet_id="155522" snippet_file_name="blog_20140114_2_3856905" name="code" class="csharp"> 使用方法如下：

/// <summary>
    /// 获取产品详情
    /// </summary>
    /// <param name="proId"></param>
    /// <returns></returns>
    public static ProductDto GetProduct(string proId)
    {
      var key = "_ProductId" + proId;
      //通过key找到缓存的对象
      var cache = Helper.CacheHelper.Get(key);
      if (cache != null)
      {
        return (ProductDto)cache;
      }
      var pro = ServiceLocator.Create<IProductService>().Get(proId);
      if (pro == null) return new ProductDto();
      Helper.CacheHelper.Set(key, DateTime.Now.AddHours(8), pro);
      return pro;
    }</pre>
<pre></pre>
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