void OnGroceryListChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
// Update item count
this.ItemCount = this.OBProductList.Count;
// Resequence list
SequencingService.SetCollectionSequence(this.OBProductList);
}
private void Initialize()
{
// Initialize commands
this.DeleteItem = new DeleteItemCommand(this);
// Create grocery list
p_ProductList = new ObservableCollection <Product>();
// Subscribe to CollectionChanged event
p_ProductList.CollectionChanged += OnGroceryListChanged;
// Initialize list index
this.OBProductList = SequencingService.SetCollectionSequence(this.OBProductList);
// Update bindings
base.RaisePropertyChangedEvent("OBProductList");
}
void OnProductListChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
this.ItemCount = this.p_ProductList.Count;
// Resequence list
SequencingService.SetCollectionSequence(this.p_ProductList);
/*
* double totalPrice = 0;
* ObservableCollection<Product> obsColl = p_ProductList;
* foreach (Product data in obsColl)
* {
* double subtotal = data.UnitPrice * data.Quantity;
* totalPrice = totalPrice + subtotal;
* }
* this._totalPrice = totalPrice;
*/
base.RaisePropertyChangedEvent("TotalPrice");
}
public ViewModel()
{
_totalPrice = 0;
if (null == p_ProductList)
{
GetProductDetails();
this.AddItem = new AddItemCommand(this);
this.PrintInvoice = new PrintInvoiceCommand(this);
// Create grocery list
p_ProductList = new ObservableCollection <Product>();
// Subscribe to CollectionChanged event
p_ProductList.CollectionChanged += OnProductListChanged;
// Initialize list index
this.OBProductList = SequencingService.SetCollectionSequence(this.OBProductList);
// Update bindings
base.RaisePropertyChangedEvent("OBProductList");
}
}