/// <summary>  
    /// 获取数据缓存  
    /// </summary>  
    /// <param name="cacheKey">键</param>  
    public static object GetCache(string cacheKey)  
    {  
        var objCache = HttpRuntime.Cache.Get(cacheKey);  
        return objCache;  
    }  
    /// <summary>  
    /// 设置数据缓存  
    /// </summary>  
    public static void SetCache(string cacheKey, object objObject)  
    {  
        var objCache = HttpRuntime.Cache;  
        objCache.Insert(cacheKey, objObject);  
    }  
    /// <summary>  
    /// 设置数据缓存  
    /// </summary>  
    public static void SetCache(string cacheKey, object objObject, int timeout = 7200)  
    {  
        try  
        {  
            if (objObject == null) return;  
            var objCache = HttpRuntime.Cache;  
            //相对过期  
            //objCache.Insert(cacheKey, objObject, null, DateTime.MaxValue,  new TimeSpan(0, 0, timeout), CacheItemPriority.NotRemovable, null);  
            //绝对过期时间  
            objCache.Insert(cacheKey, objObject, null, DateTime.UtcNow.AddSeconds(timeout), TimeSpan.Zero, CacheItemPriority.High, null);  
        }  
        catch (Exception)  
        {  
            //throw;  
        }  
    }  
    /// <summary>  
    /// 移除指定数据缓存  
    /// </summary>  
    public static void RemoveAllCache(string cacheKey)  
    {  
        var cache = HttpRuntime.Cache;  
        cache.Remove(cacheKey);  
    }  
    /// <summary>  
    /// 移除全部缓存  
    /// </summary>  
    public static void RemoveAllCache()  
    {  
        var cache = HttpRuntime.Cache;  
        var cacheEnum = cache.GetEnumerator();  
        while (cacheEnum.MoveNext())  
        {  
            cache.Remove(cacheEnum.Key.ToString());  
        }  
    }