internal async Task ExecuteLoadItemsCommand()
{
IsBusy = true;
try
{
Items.Clear();
var items = await DataStore.GetItemsAsync(true);
MyTaskEx itemEx;
foreach (var item in items)
{
itemEx = new MyTaskEx(item);
Items.Add(itemEx);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public MyTaskDetailPage()
{
InitializeComponent();
var item = new MyTaskEx
{
Name = "Item 1",
Description = "This is an item description."
};
BindingContext = viewModel = new MyTaskDetailViewModel(ref item);
}
public MyTasksViewModel(MyTasksPage page)
{
_page = page;
Title = "Browse";
Items = new ObservableCollection <MyTaskEx>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
AddItemCommand = new Command(async() => await ExecuteAddItemCommand());
ItemSelectCommand = new Command <MyTaskEx>(async(item) => await ExecuteItemSelectCommand(item));
MessagingCenter.Subscribe <NewItemPage, MyTask>(this, "AddItem", async(obj, item) =>
{
var newItem = item as MyTask;
var newItemEx = new MyTaskEx(newItem);
Items.Add(newItemEx);
await DataStore.AddItemAsync(newItem);
});
}
async Task ExecuteItemSelectCommand(MyTaskEx item)
{
await _page.Navigation.PushAsync(new MyTaskDetailPage(new MyTaskDetailViewModel(ref item)));
}
