TLongintField¶

Field class for 32-bit signed integer data.

Declaration¶

Source position: db.pas line 604

type

  TLongintField = class(TNumericField)
  public
    constructor Create;
    function CheckRange : Boolean;
    property Value: LongInt; {rw}
  published
    property MaxValue: LongInt; {rwd}
    property MinValue: LongInt; {rwd}
  end;

Inheritance¶

Description¶

TLongintField is instantiated when a dataset must manage a field with 32-bit signed data: the data type ftInteger. It overrides some methods of TField to handle integer data, and sets some of the properties to values for integer data. It also introduces some methods and properties specific to integer data such as MinValue and MaxValue.

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

Properties¶

Member	Visibility	Description
MaxValue	published	Maximum value for the field.
MinValue	published	Minimum value for the field.
Value	public	Value of the field as longint.

See all Properties

Methods¶

Member	Visibility	Description
CheckRange	public	Check whether a valid is in the allowed range of values for the field.
Create	public	Create a new instance of TLongintField.

See all Methods

Name	Description
TField	Provide access to the contents of a single field in a record.
MaxValue	Maximum value for the field.
MinValue	Minimum value for the field.