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

TFloatField

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

Class for floating point values

Declaration

Source position: db.pas line 661

type TFloatField = class(TNumericField)

public

  constructor Create(); override;

  

Create a new instance of the TFloatField

  function CheckRange();

  

Check whether a value is in the allowed range of values for the field

  property Value: Double; [rw]

  

Value of the field as a double type

published

  property Currency: Boolean; [rw]

  

Is the field a currency field.

  property MaxValue: Double; [rw]

  

Maximum value for the field

  property MinValue: Double; [rw]

  

Minimum value for the field

  property Precision: LongInt; [rw]

  

Precision (number of digits) of the field in text representations

end;

Inheritance

TFloatField

  

Class for floating point values

|

TNumericField

  

Base class for all numerical data field classes

|

TField

  

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

|

TComponent,IUnknown,IInterfaceComponentReference

|

TPersistent,IFPObserved

|

TObject

Description

TFloatField is the class created when a dataset must manage floating point values of double precision. It exposes a few new properties such as Currency, MaxValue, MinValue and overrides some TField methods to work with floating point data.

It should never be necessary to create an instance of TFloatField manually, a field of this class will be instantiated automatically for each floating-point field when a dataset is opened.

See also

Currency

  

Is the field a currency field.

MaxValue

  

Maximum value for the field

MinValue

  

Minimum value for the field


Documentation generated on: Jun 22 2020