How can I use Unicode (or just Cyrillic) chars on TStringField.FieldName property on Delphi?

Question

How can I use Unicode (or just Cyrillic) chars on TStringField.FieldName property of TClientDataSet on Delphi?

I've tried this and it doesn't work on the last line:

aStringField := TStringField.Create(aClientDataSet);
aStringField.FieldName := 'аАяЯ';
aStringField.DataSet := aClientDataSet;
aClientDataSet.CreateDataset;

Answer 1

The program below compiles and executes (XE4) without error.

program CDS;

{$APPTYPE CONSOLE}

{$R *.res}

uses
  System.SysUtils, db, dbclient;

procedure Test;
var
  aClientDataSet : TClientDataSet;
  aStringField : TStringField;
begin
  aClientDataSet := TClientDataSet.Create(Nil);
  aStringField := TStringField.Create(aClientDataSet);
  aStringField.FieldName := 'аАяЯ';
  aStringField.DataSet := aClientDataSet;
  aClientDataSet.CreateDataset;
end;

begin
  Test;
end.

Otoh if I use your declaration of aStringField (i.e. as TField) and your method of creating it, I get the r/time error "Invalid field type" on aClientDataSet.CreateDataset.