private void ListViewMenu_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            UserControl usc = null;

            mainSubColumn.Children.Clear();

            switch (((ListViewItem)((ListView)sender).SelectedItem).Name)
            {
            case "stockStockin":
                usc = new usc_user_in();
                mainSubColumn.Children.Add(usc);
                break;

            case "stockStockOut":
                usc = new usc_user_out();
                mainSubColumn.Children.Add(usc);
                break;

            case "stockinInventory":
                usc = new usc_stock_history();
                mainSubColumn.Children.Add(usc);
                break;

            case "stockoutInventory":
                usc = new usc_stockout_history();
                mainSubColumn.Children.Add(usc);
                break;
            }
        }
        public usc_stock()
        {
            InitializeComponent();
            usc_stock_history upo = new usc_stock_history();

            mainSubColumn.Children.Add(upo);
        }