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Data event handling agent for controls
Source position: db.pas line 76
type TDatalink = class end; |
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Data event handling agent for controls |
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TObject |
TDataLink is used by GUI controls or datasets in a master-detail relationship to handle data events coming from a TDatasource instance. It is a class that exists for component programmers, application coders should never need to use TDataLink or one of it's descendents.
DB-Aware Component coders must use a TDatalink instance to handle all communication with a TDataset instance, rather than communicating directly with the dataset. TDataLink contains methods which are called by the various events triggered by the dataset. Inversely, it has some methods to trigger actions in the dataset.
TDatalink is an abstract class; it is never used directly. Instead, a descendent class is used which overrides the various methods that are called in response to the events triggered by the dataset. Examples are .
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Base class for records-based data-access |
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Component representing the link between a local (GUI) component and a dataset |
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TDetailDatalink |
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Represents the link between a detail data source and a master datasource. |
TMasterDataLink |
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Datalink for Master-Detail relationships between datasets. |