基于Data Window的数据管理与更新机制的研究与应用

介绍了DataWindow控件管理数据的基本原理和处理流程 ,并深入阐述了DataWindow对象的四个缓冲区 (PrimaryBuffer,DeleteBuffer,FilterBuffer,OriginalBuffer)的功能和相互关系 ,以及它们之间是如何各司其职 ,协作完成数据的增加、删除、修改 ,并把结果提交给数据库管理系统的基本原理和过程。最后讨论了DataWindow对象的数据更新机制在编程中的一些应用 ,并用实例和源代码加以说明

Research and Application Based on DataWindow Data Manage and Update

The basic principles and realization flow of datawindow control managing data are introduced. And the functions and mutual relations of datawindow object's four buffers (PrimaryBuffer,DeleteBuffer,FilterBuffer,OriginalBuffer) are explicated. And the basic principles and process of that each buffer accomplishes its own functions to finish inserting, deleting, updating data and modifying database. Finally, some application of datawindow object's data update principles in programming is discussed, and some examples and codes are given to illustrate them.