/// <summary>
/// Saves the current order to the database.
/// </summary>
public async Task SaveOrder()
{
Order result = null;
try
{
var db = new ContosoModels.ContosoDataSource();
result = await db.Orders.PostAsync(_order);
}
catch (Exception ex)
{
throw new OrderSavingException("Unable to save. There might have been a problem " +
"connecting to the database. Please try again.", ex);
}
if (result != null)
{
await Utilities.CallOnUiThreadAsync(() => HasChanges = false);
}
else
{
await Utilities.CallOnUiThreadAsync(() => new OrderSavingException(
"Unable to save. There might have been a problem " +
"connecting to the database. Please try again."));
}
}
/// <summary>
/// Retrieves orders from the data source.
/// </summary>
public async void LoadOrders()
{
await Utilities.CallOnUiThreadAsync(() =>
{
IsLoading = true;
Orders.Clear();
masterOrdersList.Clear();
});
var db = new ContosoModels.ContosoDataSource();
var orders = await db.Orders.GetAsync();
await Utilities.CallOnUiThreadAsync(() =>
{
if (orders != null)
{
foreach (Order o in orders)
{
Orders.Add(o);
masterOrdersList.Add(o);
}
}
IsLoading = false;
});
}
/// <summary>
/// Loads the specified customer and sets the
/// SelectedCustomer property.
/// </summary>
/// <param name="customerId">The customer to load.</param>
private async void loadCustomer(Guid customerId)
{
var db = new ContosoModels.ContosoDataSource();
var customer = await db.Customers.GetAsync(customerId);
await Utilities.CallOnUiThreadAsync(() =>
{
SelectedCustomer = customer;
});
}
/// <summary>
/// Deletes the specified order from the database.
/// </summary>
/// <param name="orderToDelete">The order to delete.</param>
public async Task DeleteOrder(Order orderToDelete)
{
var db = new ContosoModels.ContosoDataSource();
var response = await db.Orders.DeleteAsync(orderToDelete.Id);
if (!response.IsSuccessStatusCode)
{
Orders.Remove(orderToDelete);
SelectedOrder = null;
}
else
{
throw new OrderDeletionException(response.ReasonPhrase);
}
}
/// <summary>
/// Queries the database and updates the list of new product suggestions.
/// </summary>
/// <param name="queryText">The query to submit.</param>
public async void UpdateProductSuggestions(string queryText)
{
ProductSuggestions.Clear();
if (!string.IsNullOrEmpty(queryText))
{
var dataSource = new ContosoModels.ContosoDataSource();
var suggestions = await dataSource.Products.GetAsync(queryText);
foreach (Product p in suggestions)
{
ProductSuggestions.Add(p);
}
}
}
/// <summary>
/// Submits a query to the data source.
/// </summary>
/// <param name="query"></param>
public async void QueryOrders(string query)
{
IsLoading = true;
Orders.Clear();
if (!string.IsNullOrEmpty(query))
{
var dataSource = new ContosoModels.ContosoDataSource();
var results = await dataSource.Orders.GetAsync(query);
await Utilities.CallOnUiThreadAsync(() =>
{
foreach (Order o in results)
{
Orders.Add(o);
}
IsLoading = false;
});
}
}
