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delphitclientdataset

current focussed field of a TClientDataSet

I have a situation where I have to allow the user to update either of 2 fields of a dbgrid(connected to a CDS) persisting the last entered one. So (after user enters data) I need to get the current focused control, so that i will remove the previous field data if it has any. I also have other fields apart from these two.

It was insisted not to use any grid related events, i have to use only CDS event to achieve this.

Thanks in advance, Vijay.

Solution

  • Use the field's OnChange event, and just clear the other field value if any:

    Something like this:

    TForm1.cdsField1Change(Sender: TField);
begin
  if not Sender.IsNull then
    cdsField2.Clear;
end;

TForm1.cdsField2Change(Sender: TField);
begin
  if not Sender.IsNull then
    cdsField1.Clear;
end;