delphi - strip out all non standard text characers from string

Question

I need to strip out all non standard text characers from a string. I need remove all non ascii and control characters (except line feeds/carriage returns).

Answer 1

my performance solution;

function StripNonAnsiChars(const AStr: String; const AIgnoreChars: TSysCharSet): string;
var
  lBuilder: TStringBuilder;
  I: Integer;
begin
  lBuilder := TStringBuilder.Create;
  try
    for I := 1 to AStr.Length do
      if CharInSet(AStr[I], [#32..#127] + AIgnoreChars) then
        lBuilder.Append(AStr[I]);
    Result := lBuilder.ToString;
  finally
    FreeAndNil(lBuilder);
  end;
end;

I wrote by delphi xe7