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Frequently Asked Questions

Accessing a grid's column/row by name

Question:

Is it possible to access a grid row or column by name?

Answer:

The following example presents two functions: GetGridColumnByName()
and GetGridRowByName() that return the given column or row that
contains the specified caption.

procedure TForm1.FormCreate(Sender: TObject);
begin
  StringGrid1.Rows[1].Strings[0] := 'This Row';
  StringGrid1.Cols[1].Strings[0] := 'This Column';
end;

function GetGridColumnByName(Grid : TStringGrid;
                             ColName : string): integer;
var
  i : integer;
begin
  for i := 0 to Grid.ColCount - 1 do
    if Grid.Rows[0].Strings[i] = ColName then begin
      Result := i;
      exit;
    end;
  Result := -1;
end;

function GetGridRowByName(Grid : TStringGrid;
                          RowName : string): integer;
var
  i : integer;
begin
  for i := 0 to Grid.RowCount - 1 do
    if Grid.Cols[0].Strings[i] = RowName then begin
      Result := i;
      exit;
    end;
  Result := -1;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  Column : integer;
  Row : integer;
begin
  Column := GetGridColumnByName(StringGrid1, 'This Column');
  if Column = -1 then
    ShowMessage('Column not found') else
    ShowMessage('Column found at ' + IntToStr(Column));
  Row := GetGridRowByName(StringGrid1, 'This Row');
  if Row = -1 then
    ShowMessage('Row not found') else
    ShowMessage('Row found at ' + IntToStr(Row));
end;

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