一起谈.NET技术，ASP.NET缓存全解析4：应用程序数据缓存

/// <summary>
/// 获取当前应用程序指定CacheKey的Cache对象值
/// </summary>
/// <param name="CacheKey"> 索引键值 </param>
/// <returns> 返回缓存对象 </returns>  
public static object GetCache( string CacheKey)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
return objCache[CacheKey];
}
/// <summary>
/// 设置当前应用程序指定CacheKey的Cache对象值
/// </summary>
/// <param name="CacheKey"> 索引键值 </param>
/// <param name="objObject"> 缓存对象 </param>
public static void SetCache( string CacheKey, object objObject)
{
System.Web.Caching.Cache objCache = HttpRuntime.Cache;
objCache.Insert(CacheKey, objObject);
}
/// <summary>
/// 设置当前应用程序指定CacheKey的Cache对象值
/// </summary>
/// <param name="CacheKey"> 索引键值 </param>
/// <param name="objObject"> 缓存对象 </param>
/// <param name="absoluteExpiration"> 绝对过期时间 </param>
/// <param name="slidingExpiration"> 最后一次访问所插入对象时与该对象过期时之间的时间间隔 </param>
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);
}
protected void Page_Load( object sender, EventArgs e)
{
string CacheKey = " cachetest " ;
object objModel = GetCache(CacheKey); // 从缓存中获取
if (objModel == null ) // 缓存里没有
{
objModel = DateTime.Now; // 把当前时间进行缓存
if (objModel != null )
{
int CacheTime = 30 ; // 缓存时间30秒
SetCache(CacheKey, objModel, DateTime.Now.AddSeconds(CacheTime), TimeSpan.Zero); // 写入缓存
}
}
Label1.Text = objModel.ToString();
}