Export datagridview data to Excel C#

using Excel; //add Interop.Excel in the References

private void CreateExcelFile(DataSet ds, string filename)
{
    if (ds.Tables[0].Rows.Count > 0)
    {
        Excel.Application objApp = new Excel.Application();
        Excel.Workbooks objBooks = objApp.Workbooks;
        Excel.Workbook objBook = objBooks.Add(Missing.Value);
        Excel.Worksheet objSheet = null;

        try
        {
            objSheet = (Excel.Worksheet)objBook.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);
            ((Excel.Worksheet)objBook.Sheets[1]).Select(Missing.Value);

            int row = 0;

            //Headers
            objSheet.Cells[row + 1, 1] = "Employee ID";
            objSheet.Cells[row + 1, 2] = "Last Name";
            objSheet.Cells[row + 1, 3] = "First Name";

            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                row++;
                for (int col = 0; col < ds.Tables[0].Columns.Count; col++)
                {
                    objSheet.Cells[row + 1, col + 1] = dr[col].ToString();
                }
            }
            objBook.Close(true, filename, Missing.Value);
            objBooks.Close();

            //string nopath = @"C:\Users\user\Documents\test.xlsx"; //name of the filename
            //objApp.Workbooks.Open(nopath);
            //objApp.Visible = true;

        }
        catch (Exception e)
        {
            MessageBox.Show("Successfully Exported!", "Export to Excel", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1);
        }
    }

    else
    {
        MessageBox.Show("No Records Found!", "Export to Excel", MessageBoxButtons.OK, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1);
    }

}