[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'DB' (#fcl)

TCustomConnection

[Properties (by Name)] [Methods (by Name)] [Events (by Name)]

Abstract class for connections to a server

Declaration

Source position: db.pas line 1996

type TCustomConnection = class(TComponent)

public

  procedure Close();

  

Close the connection

  destructor Destroy; override;

  

Remove the TCustomconnection instance from memory

  procedure Open;

  

Makes the connection to the server

  property DataSetCount: LongInt; [r]

  

Number of datasets connected to this connection

  property DataSets []: TDataSet; [r]

  

Datasets linked to this connection

published

  property Connected: Boolean; [rw]

  

Is the connection established or not

  property LoginPrompt: Boolean; [rw]

  

Should the OnLogin be triggered

  property AfterConnect: TNotifyEvent; [rw]

  

Event triggered after a connection is made.

  property AfterDisconnect: TNotifyEvent; [rw]

  

Event triggered after a connection is closed

  property BeforeConnect: TNotifyEvent; [rw]

  

Event triggered before a connection is made.

  property BeforeDisconnect: TNotifyEvent; [rw]

  

Event triggered before a connection is closed

  property OnLogin: TLoginEvent; [rw]

  

Event triggered when a login prompt is shown.

end;

Inheritance

TCustomConnection

  

Abstract class for connections to a server

|

TComponent,IUnknown,IInterfaceComponentReference

|

TPersistent,IFPObserved

|

TObject

Description

TCustomConnection must be used for all database classes that need a connection to a server. The class introduces some methods and classes to activate the connection (Open) and to deactivate the connection (TCustomConnection.Close), plus a property to inspect the state (Connected) of the connected.

See also

TCustomConnection.Open

  

Makes the connection to the server

TCustomConnection.Close

  

Close the connection

TCustomConnection.Connected

  

Is the connection established or not


Documentation generated on: Jun 22 2020