How to Binding Result from ViewModel in Xamarin - xamarin

Question

I have 1 question here: How to get data from ViewModel in Xamarin, however I still haven't solved the problem. I created a new post with some changes.
I have:
PageOne.xaml
<StackLayout>
<RefreshView x:DataType="locals:ViewCustomerViewModel" Command="{Binding LoadUserinfoCommand}" IsRefreshing="{Binding IsBusy, Mode=OneWay}">
<Label Text="{Binding Customer.Address}" />
</RefreshView>
</StackLayout>
PageOne.xaml.cs
ViewCustomerViewModel viewCustomerViewModel;
public Customer CustomerGet { get; set; }
public PageOne()
{
InitializeComponent();
BindingContext = viewCustomerViewModel = new ViewCustomerViewModel();
viewCustomerViewModel.OnAppearing();
}
Class Customer
public class Customer
{
public string Address{ get; set; }
........
}
ViewCustomerViewModel
public class ViewCustomerViewModel:BaseCustomerViewModel
{
ApiServiceUserinfo apiServiceUserinfo = new ApiServiceUserinfo();
public Command LoadUserinfoCommand { get; }
public ObservableCollection<Customer> CustomerInfos { get; set; }
public ViewCustomerViewModel()
{
LoadUserinfoCommand = new Command(async () => await ExecuteLoadUserinfoCommand());
CustomerInfos = new ObservableCollection<Customer>();
}
public void OnAppearing()
{
IsBusy = true;
}
async Task ExecuteLoadUserinfoCommand()
{
string userget = "1";
IsBusy = true;
try
{
CustomerInfos.Clear();
var customerList = await apiServiceUserinfo.GetCustomersInfo(userget);
CustomerInfos.Add(customerList);
}
catch (Exception)
{
throw;
}
finally
{
IsBusy = false;
}
}
}
And I got the result CustomerInfos.Add(customerList);
However <Label Text="{Binding Customer.Address}" /> does not get results
Please help me again clearly in the answer. Thank you.
Update
ViewCustomerViewModel
public class ViewCustomerViewModel:BaseCustomerViewModel
{
ApiServiceUserinfo apiServiceUserinfo = new ApiServiceUserinfo();
public Command LoadUserinfoCommand { get; set;}
public Customer CustomerGets { get; set;}--> update
public ViewCustomerViewModel()
{
LoadUserinfoCommand = new Command(async () => await ExecuteLoadUserinfoCommand());
//CustomerGets = new Customer();
}
public void OnAppearing()
{
IsBusy = true;
}
async Task ExecuteLoadUserinfoCommand()
{
string userget = "1";
IsBusy = true;
try
{
var customerList = await apiServiceUserinfo.GetCustomersInfo(userget);
CustomerGets = customerList;
}
catch (Exception)
{
throw;
}
finally
{
IsBusy = false;
}
}
}
PageOne.xaml
<StackLayout>
<RefreshView x:DataType="locals:ViewCustomerViewModel" Command="{Binding LoadUserinfoCommand}" IsRefreshing="{Binding IsBusy, Mode=OneWay}">
<Label Text="{Binding CustomerGets.Address}" />
</RefreshView>
</StackLayout>

Answer 1

We need to call the OnPropertyChanged method to notify the change in setter method of the property .
private Customer customerGets;
public Customer CustomerGets {
get { return customerGets; }
set {
customerGets = value;
NotifyPropertyChanged(); //the method is declared in BaseCustomerViewModel
}
}
Ensure that BaseCustomerViewModel has implemented INotifyPropertyChanged , something like that
public class BaseCustomerViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}