Hi,

It seems like having a Calculated column in a TDataset can interfere with the TDataSet.Find method.

I use the find method in the following procedure:

function TEdPlanningForm.FindAndPlan(Function:string):boolean;
begin
Result:=false;
tbPlanning.InitFind;
tbPlanning.Columns['function'].AsString:=Function;
if tbPlanning.Find(false,true) then
  begin
  tbPlanning.Update;
  tbPlanning.Columns['vak1'].AsInteger:=1;
  tbPlanning.Save;
  result:=true;
  end;
end;

That works fine, until I use the following tbPlanning.CalculateRow function. Then the find method works correct the fisrt time I call it, but if I call it again it can not find the row. It seems like this CalculateRow interferes, what do I overlook?

procedure TEdPlanningForm.tbPlanningCalculateRow(Sender: TObject; Column: TDataColumn);
var
t1,
TempInt,CurValue :integer;
begin
TempInt:=0;
for t1:=1 to 24 do
  begin
  CurValue:=tbPlanning.Columns['vak'+IntToStr(t1)].AsInteger;
  if (CurValue<>0) and (CurValue<>PauzeTijdVak) then inc(TempInt);
  end;
tbPlanning.Columns['urenvandaag'].AsInteger:=TempInt;
end;

Thanks,
Ronald

Ronald,

<< It seems like having a Calculated column in a TDataset can interfere with the TDataSet.Find method. >>

Yeah, the OnCalculateRow event is firing when the dataset is in dsFind mode.  This is now fixed for 2.04, but here's the hot fix:

WebData unit:

procedure TDataRow.ValueChanged(Index: Integer);
var
  TempColumn: TDataColumn;
begin
  TempColumn:=FDataSet.Columns[Index];
  if (not ((FDataSet.State=dsFind) or FDataSet.Calculating or TempColumn.Calculated)) then  <<< Change to this !!!!!
     FDataSet.CalculateRow(TempColumn);
  FDataSet.RowChanged(TempColumn);
end;

Tim Young
Elevate Software
www.elevatesoft.com