public async override void OnNavigatedTo(INavigationParameters parameters)
{
base.OnNavigatedTo(parameters);
switch (parameters.GetNavigationMode())
{
case NavigationMode.Back:
break;
case NavigationMode.New:
using (var client = new HttpClient())
{
var response = await client.GetAsync(Properties.Resources.BaseUrl + "invoices/GetPaidInvoices");
if (response.IsSuccessStatusCode)
{
var invoices = JsonConvert.DeserializeObject <IEnumerable <InvoiceDto> >(await response.Content.ReadAsStringAsync());
ListInvoiceBindProp = new ObservableCollection <InvoiceDto>(invoices);
}
}
CurrentInvoiceBindProp = ListInvoiceBindProp.FirstOrDefault();
break;
case NavigationMode.Forward:
break;
case NavigationMode.Refresh:
break;
default:
break;
}
}
private async void StartSignalRAsync()
{
_connection = new HubConnectionBuilder()
.WithUrl(Properties.Resources.SignalR)
.Build();
_connection.Closed += async(error) =>
{
await Task.Delay(new Random().Next(0, 5) * 1000);
await _connection.StartAsync();
};
_connection.On <InvoiceDto>("ReceiveInvoice", (invoice) =>
{
Device.BeginInvokeOnMainThread(() =>
{
ListInvoiceBindProp.Add(invoice);
});
});
_connection.On <Guid>("DeleteInvoice", (invoiceId) =>
{
var invoice = ListInvoiceBindProp.FirstOrDefault(i => i.Id == invoiceId);
Device.BeginInvokeOnMainThread(() =>
{
ListInvoiceBindProp.Remove(invoice);
});
});
_connection.On <InvoiceDto>("UpdateInvoice", (invoice) =>
{
var invoiceToUpdate = ListInvoiceBindProp.FirstOrDefault(i => i.Id == invoice.Id);
Device.BeginInvokeOnMainThread(() =>
{
invoiceToUpdate.Discounts = invoice.Discounts;
invoiceToUpdate.Items = invoice.Items;
invoiceToUpdate.Table = invoice.Table;
invoiceToUpdate.TableId = invoice.TableId;
invoiceToUpdate.TotalPrice = invoice.TotalPrice;
});
});
try
{
await _connection.StartAsync();
}
catch (Exception ex)
{
await ShowErrorAsync(ex);
}
}
public async override void OnNavigatedTo(INavigationParameters parameters)
{
switch (parameters.GetNavigationMode())
{
case NavigationMode.Back:
if (parameters.ContainsKey("item"))
{
var item = parameters["item"] as ItemForInvoiceDto;
if (InvoiceBindProp == null)
{
InvoiceBindProp = new InvoiceDto();
}
InvoiceBindProp.Items.Add(item);
InvoiceBindProp.TotalPrice += item.Value;
}
if (parameters.ContainsKey(nameof(InvoiceBindProp)))
{
var invoice = parameters[nameof(InvoiceBindProp)] as InvoiceDto;
await _connection.InvokeAsync("DeleteInvoice", InvoiceBindProp.Id);
InvoiceBindProp = null;
TempInvoiceBindProp = null;
}
break;
case NavigationMode.New:
using (var client = new HttpClient())
{
var categoryTask = client.GetAsync(Properties.Resources.BaseUrl + "categories/");
var discountTask = client.GetAsync(Properties.Resources.BaseUrl + "discounts/");
var invoiceTask = client.GetAsync(Properties.Resources.BaseUrl + "invoices/");
var zoneTask = client.GetAsync(Properties.Resources.BaseUrl + "zones/");
var allTasks = new List <Task> {
categoryTask, discountTask, invoiceTask, zoneTask
};
while (allTasks.Any())
{
Task finished = await Task.WhenAny(allTasks);
if (finished == categoryTask)
{
if (categoryTask.Result.IsSuccessStatusCode)
{
var categories = JsonConvert.DeserializeObject <IEnumerable <CategoryDto> >(await categoryTask.Result.Content.ReadAsStringAsync());
foreach (var category in categories)
{
ListCategoryBindProp.Add(category);
}
}
else
{
await PageDialogService.DisplayAlertAsync("Lỗi", $"{await categoryTask.Result.Content.ReadAsStringAsync()}", "Đóng");
}
}
else if (finished == discountTask)
{
if (discountTask.Result.IsSuccessStatusCode)
{
var discounts = JsonConvert.DeserializeObject <IEnumerable <DiscountDto> >(await discountTask.Result.Content.ReadAsStringAsync());
foreach (var discount in discounts)
{
ListDiscountBindProp.Add(discount);
}
}
else
{
await PageDialogService.DisplayAlertAsync("Lỗi", $"{await discountTask.Result.Content.ReadAsStringAsync()}", "Đóng");
}
}
else if (finished == invoiceTask)
{
if (invoiceTask.Result.IsSuccessStatusCode)
{
var invoices = JsonConvert.DeserializeObject <IEnumerable <InvoiceDto> >(await invoiceTask.Result.Content.ReadAsStringAsync());
foreach (var invoice in invoices)
{
ListInvoiceBindProp.Add(invoice);
}
}
else
{
await PageDialogService.DisplayAlertAsync("Lỗi", $"{await invoiceTask.Result.Content.ReadAsStringAsync()}", "Đóng");
}
}
else if (finished == zoneTask)
{
if (zoneTask.Result.IsSuccessStatusCode)
{
var zones = JsonConvert.DeserializeObject <IEnumerable <ZoneDto> >(await zoneTask.Result.Content.ReadAsStringAsync());
foreach (var zone in zones)
{
ListZoneBindProp.Add(zone);
}
}
else
{
await PageDialogService.DisplayAlertAsync("Lỗi", $"{await zoneTask.Result.Content.ReadAsStringAsync()}", "Đóng");
}
}
allTasks.Remove(finished);
}
var id = Xamarin.Essentials.Preferences.Get("token", "token");
var response = await client.GetAsync(Properties.Resources.BaseUrl + "users/" + id);
if (response.IsSuccessStatusCode)
{
var user = JsonConvert.DeserializeObject <UserDto>(await response.Content.ReadAsStringAsync());
CurrentUserBindProp = user;
}
}
break;
case NavigationMode.Forward:
break;
case NavigationMode.Refresh:
break;
default:
break;
}
}
public CSM_04PageViewModel(InitParamVm initParamVm) : base(initParamVm)
{
GetAllInvoice();
CurrentBillBindProp = ListInvoiceBindProp.First();
}