TDBDataset¶

Dataset connected to a database.

Declaration¶

Source position: db.pas line 2169

type

  TDBDataset = class(TDataSet)
  public
    destructor destroy;
    property DataBase: TDataBase; {rw}
    property Transaction: TDBTransaction; {rw}
  end;

Inheritance¶

Description¶

TDBDataset is a TDataset descendent which introduces the concept of a database: a central component (TDatabase) which represents a connection to a database. This central component is exposed in the TDBDataset.Database property. When the database is no longer connected, or is no longer in memory, all TDBDataset instances connected to it are disabled.

TDBDataset also introduces the notion of a transaction, exposed in the Transaction property.

TDBDataset is an abstract class, it should never be used directly.

Dataset component writers should descend their component from TDBDataset if they wish to introduce a central database connection component. The database connection logic will be handled automatically by TDBDataset.

Properties¶

Member	Visibility	Description
DataBase	public	Database this dataset is connected to.
Transaction	public	Transaction in which this dataset is running.

See all Properties

Methods¶

Member	Visibility	Description
destroy	public	Remove the TDBDataset instance from memory.

See all Methods

Name	Description
TDatabase	Base class for connecting a FreePascal application to an external Database engine.
TDBTransaction	Encapsulate a transaction.