// Click product list view to add an order item
private void ListView_ItemClick(object sender, ItemClickEventArgs e)
{
using (var db = new OrderHelperContext())
{
// Find product ID for the clicked item
int clickedPrdID = (e.ClickedItem as Product).ID;
// Check if there is existing order item for this product
OrderDetail orderItem = OrderDetails
.Where(od => od.ProductID == clickedPrdID && String.IsNullOrEmpty(od.Remarks))
.FirstOrDefault();
// If clicked product does not exist in current order items, create a new item for this product
if (orderItem == null)
{
var productToAdd = db.Products
.SingleOrDefault(p => p.ID == clickedPrdID);
if (productToAdd == null)
{
return;
}
var orderDetail = new OrderDetail
{
Quantity = 1,
ProductID = clickedPrdID,
UnitPrice = productToAdd.UnitPrice,
Product = productToAdd,
};
OrderDetails.Add(orderDetail);
}
// If clicked product alreay exist in order list, increase the product quantity by 1
else
{
orderItem.Quantity++;
}
}
}
private async void btn_Checkout_Click(object sender, RoutedEventArgs e)
{
// Set order
Order.OrderDate = DateTime.Now;
Order.Payment = (sender as Button).Content.ToString();
// Speak order
await Order.Speak();
// Print order
await PrintOrder(Order);
// Save order
using (var db = new OrderHelperContext())
{
foreach (OrderDetail od in OrderDetails)
{
//db.Entry(od.Product).State = EntityState.Detached;
od.Product = null;
}
db.Add(this.Order);
await db.SaveChangesAsync();
}
// Reset order
this.InitializeOrders();
}
/// <summary>
/// Initializes the singleton application object. This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
public App()
{
this.InitializeComponent();
this.Suspending += OnSuspending;
using (var db = new OrderHelperContext())
{
db.Database.Migrate();
DbInitializer.Initialize(db);
}
}
public MainPage()
{
using (var db = new OrderHelperContext())
{
// Load all products under each category for menu to display
Categories = db.Categories
.Include(c => c.Products)
.ToList();
}
this.InitializeOrders();
this.InitializeComponent();
}
public OrderIndexPage()
{
this.DateOfOrders = DateTime.Today;
using (var db = new OrderHelperContext())
{
var orderList = db.Orders
.Where(o => o.OrderDate.Date == DateOfOrders.Date)
.OrderBy(o => o.OrderDate)
.ToList();
this.Orders = new ObservableCollection <Order>(orderList);
}
this.InitializeComponent();
}
private void btn_Delete_Click(object sender, RoutedEventArgs e)
{
int orderID = (sender as Button).TabIndex;
var orderToDelete = Orders
.SingleOrDefault(o => o.ID == orderID);
if (orderToDelete == null)
{
return;
}
using (var db = new OrderHelperContext())
{
db.Entry(orderToDelete).State = Microsoft.EntityFrameworkCore.EntityState.Deleted;
db.SaveChangesAsync();
}
this.Orders.Remove(orderToDelete);
}
// Print the receipt of selected order
private async void btn_Print_Click(object sender, RoutedEventArgs e)
{
var orderID = (sender as Button).TabIndex;
using (var db = new OrderHelperContext())
{
var orderToPrint = await db.Orders
.Include(o => o.OrderDetails)
.ThenInclude(od => od.Product)
.SingleOrDefaultAsync(o => o.ID == orderID);
if (orderToPrint == null)
{
return;
}
await orderToPrint.Print();
}
}
// Reprint last receipt
private async void btn_Reprint_Click(object sender, RoutedEventArgs e)
{
using (var db = new OrderHelperContext())
{
// Get the latest order with order details list
var lastOrderDate = await db.Orders.MaxAsync(o => o.OrderDate);
var lastOrder = await db.Orders
.Include(o => o.OrderDetails)
.ThenInclude(od => od.Product)
.FirstOrDefaultAsync(o => o.OrderDate == lastOrderDate);
if (lastOrder == null)
{
return;
}
await PrintOrder(lastOrder);
}
}
