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

TGraphicField

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

Field class for graphical BLOB field data

Declaration

Source position: db.pas line 979

type TGraphicField = class(TBlobField)

public

  constructor Create(); override;

  

Create a new instance of the TGraphicField class

end;

Inheritance

TGraphicField

  

Field class for graphical BLOB field data

|

TBlobField

  

Base class for BLOB field data

|

TField

  

Provide access to the contents of a single field in a record

|

TComponent,IUnknown,IInterfaceComponentReference

|

TPersistent,IFPObserved

|

TObject

Description

TGraphicField is the class used when a dataset must manage graphical BLOB data. (TField.DataType equals ftGraphic). It initializes some of the properties of the TField class. All methods to be able to work with graphical BLOB data have been implemented in the TBlobField parent class.

It should never be necessary to create an instance of TGraphicsField manually, a field of this class will be instantiated automatically for each graphical BLOB field when a dataset is opened.

See also

TDataset

  

Base class for records-based data-access

TField

  

Provide access to the contents of a single field in a record

TBLOBField

  

Base class for BLOB field data

TMemoField

  

Base class for MEMO (text BLOB) field data

TWideMemoField

  

Field class for wide MEMO (widestring text BLOB) field data


Documentation generated on: Jun 22 2020