Импорт из XLSX

function Xls_To_StringGrid(AGrid: TStringGrid; AXLSFile: string): Boolean;
const
xlCellTypeLastCell = $0000000B;
var
XLApp, Sheet: OLEVariant;
RangeMatrix: Variant;
x, y, k, r: Integer;
begin
Result := False;
// Create Excel-OLE Object
XLApp := CreateOleObject('Excel.Application');
try
// Hide Excel
XLApp.Visible := False;

// Open the Workbook
XLApp.Workbooks.Open(AXLSFile);

// Sheet := XLApp.Workbooks[1].WorkSheets[1];
Sheet := XLApp.Workbooks[ExtractFileName(AXLSFile)].WorkSheets[1];

// In order to know the dimension of the WorkSheet, i.e the number of rows
// and the number of columns, we activate the last non-empty cell of it

Sheet.Cells.SpecialCells(xlCellTypeLastCell, EmptyParam).Activate;
// Get the value of the last row
x := XLApp.ActiveCell.Row;
// Get the value of the last column
y := XLApp.ActiveCell.Column;

// Set Stringgrid's row &col dimensions.

AGrid.RowCount := x;
// AGrid.ColumnCount := y;

// Assign the Variant associated with the WorkSheet to the Delphi Variant

RangeMatrix := XLApp.Range['A1', XLApp.Cells.Item[X, Y]].Value;
// Define the loop for filling in the TStringGrid
k := 2;
repeat
for r := 1 to y do begin
AGrid.Cells[(r - 1), (k-2)] := RangeMatrix[K, R];
if r=1 then AGrid.Cells[0,k-2]:= Timetostr(strtofloat( AGrid.Cells[0,k-2])) ;

end;
Inc(k, 1);
AGrid.RowCount := k + 1;
until k > x;
// Unassign the Delphi Variant Matrix
RangeMatrix := Unassigned;

finally
// Quit Excel
if not VarIsEmpty(XLApp) then
begin
// XLApp.DisplayAlerts := False;
XLApp.Quit;
XLAPP := Unassigned;
Sheet := Unassigned;
Result := True;
end;
end;
end;



procedure TForm1.Button1Click(Sender: TObject);
var fname:string;
begin
// OpenDialog1.InitialDir:='..\..\Export' ;

if OpenDialog1.Execute=true then

fname:= OpenDialog1.FileName;

if Xls_To_StringGrid(StringGrid1, fname) then
ShowMessage('Файл '+fname+ ' успешно загружен');

Form1.Caption:='Импорт из файла '+fname;
end;