东西沿着这些路线？

public DataTable GetDataTableFromCacheOrDatabase()
{
   DataTable dataTable = HttpContext.Current.Cache["secret key"] as DataTable;
   if(dataTable == null)
   {
       dataTable = GetDataTableFromDatabase();
       HttpContext.Current.Cache["secret key"] = dataTable;
   }
   return dataTable;
}

您会需要一些机制来从缓存刷新的数据表，如果它的变化。例如，你可以使用SqlCacheDependency.

You're going to need some mechanism to flush the data table from the cache if it changes. For example you could use an SqlCacheDependency.

根据要求，清除缓存一个小时后，该表添加你会做：

As requested, to clear the cache an hour after the table is added you would do:

HttpContext.Current.Cache.Insert("secret key", dataTable, null, DateTime.Now.AddHours(1), System.Web.Caching.Cache.NoSlidingExpiration);