private void btnGo_Click(object sender, EventArgs e)
        {
            try
            {
                int itemID;
                if (!string.IsNullOrEmpty(txtItemID.Text))
                {
                    _itemID = int.Parse(txtItemID.Text);
                }
                itemID = _itemID;
                BLL.Item itm = new BLL.Item();
                itm.LoadByPrimaryKey(itemID);
                lblFullItemName.Text = itm.FullItemName;

                rd.LoadByItemID(itemID);
                grdReceiveDoc.DataSource = rd.DefaultView;

                recPallet.LoadByItemID(itemID);
                grdReceivePallet.DataSource = recPallet.DefaultView;

                id.LoadByItemID(itemID);
                grdIssueDoc.DataSource = id.DefaultView;

                ordDetail.LoadByItemID(itemID);
                grdOrderDetail.DataSource = ordDetail.DefaultView;

                pld.LoadByItemID(itemID);
                grdPickListDetail.DataSource = pld.DefaultView;

                _lossAndAdjustment.LoadByItemID(itemID);
                grdDisposal.DataSource = _lossAndAdjustment.DefaultView;

                yearEnd.LoadByItemID(itemID);
                grdYearEnd.DataSource = yearEnd.DefaultView;

                BLL.ItemUnit iu = new BLL.ItemUnit();
                iu.LoadAllForItem(int.Parse(txtItemID.Text));

                grdItemManufacturerItemUnit.DataSource = iu.DefaultView;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }