private void FrmOpenTakingInventory_Load(object sender, EventArgs e)
        {
            INVInventoryService inventoryService=new INVInventoryService ();
            cmb_inventory.DataSource = inventoryService.SelectAll();
            cmb_inventory.DisplayMember = "InventoryName";
            cmb_inventory.ValueMember= "InventoryID";

            BDProductService productService = new BDProductService();
            cmb_Product.DataSource = productService.SelectAll();
            cmb_Product.DisplayMember = "ProductName";
            cmb_Product.ValueMember = "ProductID";

            BDProductGroupService productGroupService = new BDProductGroupService();
            cmb_productGroup.DataSource = productGroupService.SelectAll();
            cmb_productGroup.DisplayMember = "ProductGroupName";
            cmb_productGroup.ValueMember = "ProductGroupID";

            ResetFields();
        }