Сохранение и чтение TStringGrid

Вариант 1:

Source: DelphiWorld 6.0 https://delphiworld.narod.ru/

procedure SaveGrid;
var
  f: textfile;
  x, y: integer;
begin
  assignfile(f, 'Filename');
  rewrite(f);
  writeln(f, stringgrid.colcount);
  writeln(f, stringgrid.rowcount);
  for X := 0 to stringgrid.colcount - 1 do
    for y := 0 to stringgrid.rowcount - 1 do
      writeln(F, stringgrid.cells[x, y]);
  closefile(f);
end;

procedure LoadGrid;
var
  f: textfile;
  temp, x, y: integer;
  tempstr: string;
begin
  assignfile(f, 'Filename');
  reset(f);
  readln(f, temp);
  stringgrid.colcount := temp;
  readln(f, temp);
  stringgrid.rowcount := temp;
  for X := 0 to stringgrid.colcount - 1 do
    for y := 0 to stringgrid.rowcount - 1 do
    begin
      readln(F, tempstr);
      stringgrid.cells[x, y] := tempstr;
    end;
  closefile(f);
end;

Вариант 2:

Source: https://www.swissdelphicenter.ch

// Save a TStringGrid to a file 

procedure SaveStringGrid(StringGrid: TStringGrid; const FileName: TFileName);
var
  f:    TextFile;
  i, k: Integer;
begin
  AssignFile(f, FileName);
  Rewrite(f);
  with StringGrid do
  begin
    // Write number of Columns/Rows 
    Writeln(f, ColCount);
    Writeln(f, RowCount);
    // loop through cells 
    for i := 0 to ColCount - 1 do
      for k := 0 to RowCount - 1 do
        Writeln(F, Cells[i, k]);
  end;
  CloseFile(F);
end;

// Load a TStringGrid from a file 

procedure LoadStringGrid(StringGrid: TStringGrid; const FileName: TFileName);
var
  f:          TextFile;
  iTmp, i, k: Integer;
  strTemp:    String;
begin
  AssignFile(f, FileName);
  Reset(f);
  with StringGrid do
  begin
    // Get number of columns 
    Readln(f, iTmp);
    ColCount := iTmp;
    // Get number of rows 
    Readln(f, iTmp);
    RowCount := iTmp;
    // loop through cells & fill in values 
    for i := 0 to ColCount - 1 do
      for k := 0 to RowCount - 1 do
      begin
        Readln(f, strTemp);
        Cells[i, k] := strTemp;
      end;
  end;
  CloseFile(f);
end;


// Save StringGrid1 to 'c:\temp.txt': 

procedure TForm1.Button1Click(Sender: TObject);
begin
  SaveStringGrid(StringGrid1, 'c:\temp.txt');
end;

// Load StringGrid1 from 'c:\temp.txt': 

procedure TForm1.Button2Click(Sender: TObject);
begin
  LoadStringGrid(StringGrid1, 'c:\temp.txt');
end;