FireDAC.Comp.DataSet.TFDDataSet.EditRangeStart

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Delphi 

procedure EditRangeStart;

C++ 

void __fastcall EditRangeStart();

Eigenschaften

Typ Sichtbarkeit Quelle Unit Übergeordnet
procedure
function
 public
FireDAC.Comp.DataSet.pas
FireDAC.Comp.DataSet.hpp
 FireDAC.Comp.DataSet TFDDataSet


Beschreibung

Enables changing the starting value for an existing range.

Call EditRangeStart to bring the dataset to the dsSetKey state and change the starting value for an existing range. 

After the call, the application can modify indexed fields. To iterate through them, use the IndexFieldCount and IndexFields properties. Optionally, the value of the KeyFieldCount and/or KeyExclusive properties can be edited. 

After assigning a new ending value, call ApplyRange to activate the modified range.

Example

FDQuery1.IndexFieldNames := 'CUST_NO';
FDQuery1.SetRangeStart;
FDQuery1['CUST_NO'] := 100;
FDQuery1.SetRangeEnd;
FDQuery1['CUST_NO'] := 200;
FDQuery1.ApplyRange;
......
FDQuery1.EditRangeStart;
FDQuery1['CUST_NO'] := FDQuery1['CUST_NO'] + 1;
FDQuery1.ApplyRange;

See Also

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