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    TField.IsNull

    Is the field empty.

    Declaration

    Source position: db.pas line 462

    public property IsNull: Boolean;

    Description

    IsNull is True if the field does not have a value. If the underlying data contained a value, or a value is written to it, IsNull will return False. After TDataset.Insert is called or Clear is called then IsNull will return True.

    See also

    Name Description
    TField.Clear Clear the field contents.
    TDataset.Insert Insert a new record at the current position.