async Task ExecuteLoadItemsCommand()
{
if (IsBusy)
{
return;
}
IsBusy = true;
try
{
Items.Clear();
var items = await ExpensesDataStore.GetItemsAsync(true);
Items.ReplaceRange(items);
}
catch (Exception ex)
{
Debug.WriteLine(ex);
MessagingCenter.Send(new MessagingCenterAlert
{
Title = "Error",
Message = "Unable to load items.",
Cancel = "OK"
}, "message");
}
finally
{
IsBusy = false;
}
}
public async Task AddAFile()
{
await FileService.AddFile((file) =>
{
var expenseFiles = new ExpenseFile {
ExpenseId = Item.ExpenseId, File = file.Bytes, Name = file.Name, Size = file.Size
};
Item.ExpenseFiles.Add(expenseFiles);
ExpensesDataStore.UpdateItemAsync(Item);
ExpenseFiles.Add(expenseFiles);
});
}
public ExpensesViewModel()
{
Title = "Browse";
Items = new ObservableRangeCollection <Expense>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <NewExpensePage, Expense>(this, "AddItem", async(obj, item) =>
{
var _item = item as Expense;
await ExpensesDataStore.AddItemAsync(_item);
Items.Add(_item);
});
}
public ExpenseDetailViewModel(Expense item = null)
{
Title = item.Name;
Item = item;
ExpenseFiles = new ObservableCollection <ExpenseFile>();
foreach (var expenseFile in Item.ExpenseFiles)
{
ExpenseFiles.Add(expenseFile);
}
SetLines();
MessagingCenter.Subscribe <PayForExpensePage, Expense>(this, "PayForExpense", async(obj, it) =>
{
Item.PaidDate = it.PaidDate;
Item.PaidValue = it.PaidValue;
Item.Paid = true;
await ExpensesDataStore.UpdateItemAsync(Item);
SetLines();
});
}