Cache缓存帮助类

using System;
using System.Web;
using System.Collections;
namespace MSCL
{
/// <summary>
/// Cache辅助类
/// </summary>
public class CacheHelper
{
/// <summary>
/// 获取数据缓存
/// </summary>
/// <param name="CacheKey">键</param>
public static object GetCache(string CacheKey)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
return objCache[CacheKey];
}
/// <summary>
/// 设置数据缓存
/// </summary>
public static void SetCache(string CacheKey, object objObject)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(CacheKey, objObject);
}
/// <summary>
/// 设置数据缓存
/// </summary>
public static void SetCache(string CacheKey, object objObject, TimeSpan Timeout)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(CacheKey, objObject, null, DateTime.MaxValue, Timeout, System.Web.Caching.CacheItemPriority.NotRemovable, null);
}
/// <summary>
/// 设置数据缓存
/// </summary>
public static void SetCache(string CacheKey, object objObject, DateTime absoluteExpiration, TimeSpan slidingExpiration)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(CacheKey, objObject, null, absoluteExpiration, slidingExpiration);
}
/// <summary>
/// 移除指定数据缓存
/// </summary>
public static void RemoveAllCache(string CacheKey)
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
_cache.Remove(CacheKey);
}
/// <summary>
/// 移除全部缓存
/// </summary>
public static void RemoveAllCache()
{
System.Web.Caching.Cache _cache = HttpRuntime.Cache;
IDictionaryEnumerator CacheEnum = _cache.GetEnumerator();
while (CacheEnum.MoveNext())
{
_cache.Remove(CacheEnum.Key.ToString());
}
}
}
}

var cache = MSCL.CacheHelper.GetCache("mydata");
List<TestTable> list = new List<TestTable>();
if (cache == null)
{
int recordCount = 0;
int totalPage = 0;
list = RBAC.Dal.DataRootBase.QueryPagingMssql<TestTable>("TestTable", "*", "D_Id asc", 2, 10, "", out recordCount, out totalPage);
//插入cache 缓存30秒
MSCL.CacheHelper.SetCache("mydata", list, DateTime.Now.AddSeconds(30), TimeSpan.Zero);
}
else
{
list = (List<TestTable>)cache;
}
foreach (var item in list)
{
str += string.Format("用户名{0}密码{1}真实姓名{2}--{3}<br>", item.D_Id, item.D_Password, item.D_Name, DateTime.Now);
}