使用DataRelation有什么好处？
[英]What is the advantage of using a DataRelation?
问题描述
I'd like to know what the advantage of using a DataRelation in .NET is, as opposed to crafting the relationship in the data layer itself? 
我想知道与在数据层本身中建立关系相比，在.NET中使用DataRelation有什么好处？ Or is this largely a decision by the developer about which tier to place their logic in? 还是在很大程度上由开发人员决定将其逻辑放置在哪一层？
1 个解决方案
解决方案1
3 已采纳 2009-09-27 20:19:40
A DataSet (and its various components) basically functions as an in-memory representation of table-based data, and is most useful for allowing a client application to work with data in a disconnected state. DataSet（及其各种组件）基本上起基于表的数据的内存表示形式，并且对于允许客户端应用程序以断开状态使用数据最有用。 Therefore, a DataRelation shouldn't normally function in place of a data relation defined in your database; 因此，DataRelation通常不应代替数据库中定义的数据关系。 rather, it should function as an emulation or representation of that relationship defined elsewhere. 相反，它应该充当其他地方定义的关系的仿真或表示。
Architecting your system so that a data relation is defined only in your client application in the form of a DataRelation would be a bad idea, IMHO. 架构您的系统，以便仅以 DataRelation的形式在客户端应用程序中定义数据关系将是个坏主意，恕我直言。
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