protected async override void OnAppearing()
{
base.OnAppearing();
TablesPageModel.NavigateToDrinksPage += HandleNavigateToDrinksPage;
TablesPageModel.NavigateToOrderPage += HandleNavigateToOrderPage;
if (WcfServicesProxy.Instance.ServiceCallConfig != WcfServicesProxy.ServiceCallConfigType.AllServiceCallsOff)
{
TableList.IsEnabled = false;
TableList.IsRefreshing = true;
//Moved to app.xaml.cs
//if (FirstTimeLoadMenu)
//{
// await DataLoader.LoadToppingsFromFileOrServer();
// //var toppingsTask = DataBaseDictionaries.LoadToppingsFromServerAsync();
// //var menuTask = WcfServicesProxy.Instance.GetMenuAsync();
// //await Task.WhenAll(toppingsTask, menuTask);
// FirstTimeLoadMenu = false;
//}
var tablesServerTaskSuccess = await DataBaseDictionaries.LoadTableDataAsync();
if (tablesServerTaskSuccess)
{
TableList.IsRefreshing = false;
TableList.IsEnabled = true;
}
//Don't know how to get an exception from the above await.....
//if (exception != null)
//{
// await DisplayAlert("Warning!", "Loading data from server encountered the exception: " + exception.InnerException.Message, "OK");
//}
}
}
public static void LoadToppingsFromFileOrServer()
{
string pizzaToppingsFileName = "WaiterClientPizzaToppings.json";
string saladToppingsFileName = "WaiterClientSaladToppings.json";
string writeFilePath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
var pizzaTopPathWithFileName = Path.Combine(writeFilePath, pizzaToppingsFileName);
var saladTopPathWithFileName = Path.Combine(writeFilePath, saladToppingsFileName);
if (File.Exists(pizzaTopPathWithFileName))
{
DataBaseDictionaries.PizzaToppingsDictionary = JsonConvert.DeserializeObject <Dictionary <decimal, DBModifier> >(File.ReadAllText(pizzaTopPathWithFileName));
}
else
{
DataBaseDictionaries.LoadPizzaToppingsFromServer();
File.WriteAllText(pizzaTopPathWithFileName, JsonConvert.SerializeObject(DataBaseDictionaries.PizzaToppingsDictionary));
}
if (File.Exists(saladTopPathWithFileName))
{
DataBaseDictionaries.SaladToppingsDictionary = JsonConvert.DeserializeObject <Dictionary <decimal, DBModifier> >(File.ReadAllText(saladTopPathWithFileName));
}
else
{
DataBaseDictionaries.LoadSaladToppingsFromServer();
File.WriteAllText(saladTopPathWithFileName, JsonConvert.SerializeObject(DataBaseDictionaries.SaladToppingsDictionary));
}
}
private async Task OnRefreshing(object sender, EventArgs e)
{
try
{
await Task.Run(() => DataBaseDictionaries.LoadTableDataAsync());
}
finally
{
((ListView)sender).IsRefreshing = false;
}
}
