One scenario where you might use this functionality is to disallow a user to return to a step after it has been completed because you are persisting the data to a database as each step is completed 一个您可能使用此功能的情形是不允许用户在完成某个步骤后返回它，因为您要在完成每个步骤后将数据保持到数据库。
Asp . net also provides session - state providers that allow you to use a session - state server that keeps session data in a separate process , or you can persist session state data to a sql database Asp . net还提供会话状态提供程序，它允许您使用可在单独的进程中保留会话数据的会话状态服务器，或者您可以将会话状态数据保持在sql数据库中。
Applications that handle sensitive data or make any kind of security decisions need to keep that data under their own control and cannot allow other potentially malicious code to access the data directly 处理重要数据或做出任何种类的安全决策的应用程序需要将相关的数据保持在自己的控制之下，而不允许其他可能的恶意代码直接访问这些数据。
To persist asp . net application services data in another data store besides sql server such as a microsoft access database , xml files , or other rdbms systems , you must create a separate provider for each kind of data store 若要将asp . net应用程序服务数据保持在sql server以外的其他数据存储区（如microsoft access数据库、 xml文件或其他rdbms系统）中，则必须为每种数据存储区创建一个单独的提供程序。
If that is correct , subtracting the current - account surplus ( presumably one of china ' s more accurate numbers since it consists of trade with other countries ) from that figure would imply a less hair - raising investment rate of 37 % of gdp 如果这个数据是正确的，那么从中减去经常帐户赢余（因其需同其他国家贸易有关数据保持一致故被认为是中国较为可信的数据之一）就意味着投资比例占gdp的37 % ，这个数据就没有那么令人毛骨悚然了。
For volatile items that are stored in the cache , such as those that have regular data refreshes or those that are valid for only a set amount of time , you typically set an expiration policy that keeps those items in the cache as long as their data remains current 对于存储在缓存中的易失项（例如那些定期进行数据刷新的项或那些只在一段时间内有效的项） ，通常设置一种过期策略：只要这些项的数据保持为最新的，就将它们保留在缓存中。
The system uses the sdt algorithm to compress the process data and then saves it to the historical database . the concurrence of relative error is maintained under an acceptable level . it has obtained the satisfactory compression effect and enormously reduced the data storage space 系统采用旋转门压缩算法,将过程数据压缩后存储于历史数据库,压缩后的重现数据保持较小的相对误差,取得了满意的压缩效果,极大减少了数据的存储空间。
Depend on the practical item application , this paper analyses the limitation in the government network system heterogeneous databases " information - sharing . such as investment too high , searching information ca n ' t keep consistent with the real data , overlapping investment and overlapping developing , ect 本论文从实际项目的应用出发，分析了在实际项目中实现政务网络系统异构数据库之间信息共享的局限性：项目投资过高、查询信息不能与实际数据保持实时一致、重复投资与开发等。
