private void UpdateQuantityByRID() { long lngProductID = 0; try { lngProductID = long.Parse(cboProductCode.SelectedValue); if (lngProductID != 0) { Products clsProduct = new Products(); txtQuantity.Text = clsProduct.getReorderQtyByRID(lngProductID, Convert.ToDateTime(txtIDCStartDate.Text + " 00:00:00"), Convert.ToDateTime(txtIDCEndDate.Text + " 23:59:59")).ToString("#,##0.##0"); clsProduct.CommitAndDispose(); ComputeItemAmount(); } } catch { } }