// データをエクセルへエクスポート
private void btnExport_Click(object sender, EventArgs e)
{
DataTable dt = new DataTable();
dt = (DataTable)dgvBatchNo.DataSource;
ExcelClass xl = new ExcelClass();
xl.ExportToExcel(dt);
//xl.ExportToCsv(dt, System.Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory) + @"\ipqcdb.csv");
}