This technology is intended for unified way of loading tabular information from the server to the client with afterward processing these data on the client: editing, sorting, filtrations and unloading changed data back to the server. This technology doesn’t include drivers to access server but it have a set of components and global events to redirect flow of data to/from server using your favorite access engine.
The technology is represented by two main components:
TMemTableEh - is a dataset that hold data in memory. Its possible to consider it as an array of records.
Besides, this dataset:
TDataDriverEh - carry out two tasks:
Furthermore, there are several components that are inherited from TDataDriverEh. These are a TSQLDataDriverEh, that have properties to keep five SQL expressions and parameters to: query data, delete record, insert record, update record and require one record. TSQLDataDriverEh can’t interact with server by itself, but can prepare parameters for request and can call global event to transfer SQL expression for processing in application. There are several components which are inherited from TSQLDataDriverEh and which can send SQL expressions to the server through the corresponding access engine. These are TBDEDataDriverEh, TIBXDataDriverEh, TDBXDataDriverEh and TADODataDriverEh components.
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