private void btnGo_Click(object sender, EventArgs e) { var itm = new Item(); if (!grpByItems.Checked) gridDetailReport.DataSource = itm.GetExpiredItemsByReceivedDate(Convert.ToInt32(lkMode.EditValue), Convert.ToDateTime(dateFrom.Text), Convert.ToDateTime(dateTo.Text), Convert.ToInt32(lkWarehouse.EditValue)); }