async void OnAddExpense(object sender, EventArgs e)
{
decimal expense = 0;
var canParse = decimal.TryParse(TxtExpense.Text, out expense);
if (CmbCategory.SelectedIndex == -1)
{
await DisplayAlert("Pequeño problema", "Debe elegir una categoría", "Ok");
return;
}
if (!canParse)
{
await DisplayAlert("Pequeño problema", "El número ingresado como gasto no es valido", "Ok");
return;
}
var selectedCategoryName = CmbCategory.Items[CmbCategory.SelectedIndex];
var category = Category.GetDefaultCategories().First(c => c.Name == selectedCategoryName);
var expenseObject = new Expense
{
CategoryId = category.Id,
Value = expense
};
var expenseRepository = new ExpenseRepository();
expenseRepository.AddItem(expenseObject);
await Navigation.PopAsync();
}
public void OnDelete(object sender, EventArgs e)
{
var mi = ((MenuItem)sender);
var item = mi.CommandParameter;
var expenseRepository = new ExpenseRepository();
expenseRepository.DeleteItem(((Expense)item).Id);
LoadList();
}
protected override void OnAppearing()
{
base.OnAppearing();
var expenseRepository = new ExpenseRepository();
var expenses = expenseRepository.GetExpenses();
this.ViewModel.TotalExpenseCount = expenses.Sum(e => e.Value);
}
private void LoadList()
{
var expenseRepository = new ExpenseRepository();
var expenses = expenseRepository.GetExpenses();
ViewModel.Expenses.Clear();
var categories = Category.GetDefaultCategories();
foreach (var exp in expenses)
{
exp.Category = categories.FirstOrDefault(cat => cat.Id == exp.CategoryId);
ViewModel.Expenses.Add(exp);
}
}