FireDAC.Comp.DataSet.TFDAutoIncField.ClientAutoIncrement
| [–] Properties | |
|---|---|
| Type: property | |
| Visibility: published | |
| Source: FireDAC.Comp.DataSet.pas FireDAC.Comp.DataSet.hpp
| |
| Unit: FireDAC.Comp.DataSet | |
| Parent: TFDAutoIncField | |
Delphi
property ClientAutoIncrement: Boolean read FClientAutoIncrement
C++
__property bool ClientAutoIncrement = {read=FClientAutoIncrement, write=SetClientAutoIncrement, default=1};
Description
Specifies when the dataset needs to generate the autoincrementing value for the new record column.
When setting the ClientAutoIncrement property to True (default value), the dataset generates the autoincrementing value for the new record column.
The dataset uses an internal autoincrementing value generator. The initial value is equal to AutoIncrementSeed. The value is incremented for the new record using AutoIncrementStep. After the dataset is closed, the internal autoincrementing value generator is reset to AutoIncrementSeed.
This is useful when CachedUpdates is True.
Example
FDQuery1.CachedUpdates := True;
FDQuery1.Open;
FDQuery1.Append;
....
FDQuery1.Post;
// TFDAutoIncField(FDQuery1.Fields[0]).Value -> -1
FDQuery1.Append;
....
FDQuery1.Post;
// TFDAutoIncField(FDQuery1.Fields[0]).Value -> -2
FDQuery1.Append;
....
FDQuery1.Post;
// TFDAutoIncField(FDQuery1.Fields[0]).Value -> -3
FDQuery1.ApplyUpdates;