We also demonstrate turning on and off the retrieval of linked sets, making it easier for the user to scroll through the customer records and retrieve the relational datasets as needed. It is functionally equivalent to the above OneToMToMProject. DPR, but requires virtually no code. Various visual properties are provided to set and link tables together. A ClientConnection component is used to coordinate data retrieval in the correct hierarchial order, and to ensure that the user cannot move off a record while child records are still being retrieved.
M are efficient.
The entire group for any level is first retrieved, then the first record of that group is selected and used as the control record for the next lower level. This means that you are not cascading through dozens of record retrievals every time you retrieve a new higher-level record. Displays pop up immediately - there is no blinking or enforced refreshing. M functionality to produce a many to many app using a central, cross link table. The framework for an Internet ordering system including customer validation, passwords, wizard pages and order summaries.