TCustomConnection¶

Abstract class for connections to a server.

Declaration¶

Source position: db.pas line 2233

type

  TCustomConnection = class(TComponent)
  public
    procedure Close;
    destructor Destroy;
    procedure Open;
    property DataSetCount: LongInt; {r}
    property DataSets[Index : LongInt]: TDataSet; {r}
  published
    property Connected: Boolean; {rw}
    property LoginPrompt: Boolean; {rw}
    property AfterConnect: TNotifyEvent; {rw}
    property AfterDisconnect: TNotifyEvent; {rw}
    property BeforeConnect: TNotifyEvent; {rw}
    property BeforeDisconnect: TNotifyEvent; {rw}
    property OnLogin: TLoginEvent; {rw}
    property OnCloseError: TCloseErrorEvent; {rw}
  end;

Inheritance¶

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.

Properties¶

Member	Visibility	Description
AfterConnect	published	Event triggered after a connection is made.
AfterDisconnect	published	Event triggered after a connection is closed.
BeforeConnect	published	Event triggered before a connection is made.
BeforeDisconnect	published	Event triggered before a connection is closed.
Connected	published	Is the connection established or not.
DataSetCount read only	public	Number of datasets connected to this connection.
DataSets read only	public	Datasets linked to this connection.
LoginPrompt	published	Should the OnLogin be triggered.

See all Properties

Methods¶

Member	Visibility	Description
Close	public	Close the connection.
Destroy	public	Remove the TCustomconnection instance from memory.
Open	public	Makes the connection to the server.

See all Methods

Events¶

Member	Visibility	Description
OnCloseError	published
OnLogin	published	Event triggered when a login prompt is shown.

See all Events

Name	Description
TCustomConnection.Open	Makes the connection to the server.
TCustomConnection.Close	Close the connection.
TCustomConnection.Connected	Is the connection established or not.