Declaration¶
Source position: db.pas line 718
type
TLargeintField = class(TNumericField)
public
constructor Create;
function CheckRange : Boolean;
property Value: LargeInt; {rw}
published
property MaxValue: LargeInt; {rwd}
property MinValue: LargeInt; {rwd}
end;
Inheritance¶
Description¶
TLargeIntField is instantiated when a dataset must manage a field with 64-bit signed data: the data type ftLargeInt. It overrides some methods of TField to handle int64 data, and sets some of the properties to values for int64 data. It also introduces some methods and properties specific to 64-bit integer data such as MinValue and MaxValue.
It should never be necessary to create an instance of TLargeIntField manually, a field of this class will be instantiated automatically for each int64 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 | Field contents as a 64-bit integer value. |
Methods¶
| Member | Visibility | Description |
|---|---|---|
| CheckRange | public | Check whether a values falls within the allowed range. |
| Create | public | Create a new instance of the TLargeintField class. |