Xamarin Forms MVVM Binding Listview

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I want to create a list of users, however, I am not able to perform Binding, the data is not displayed. If the Follows my structure:

Listusuarios.xaml:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="E_Tools.View.ListUsuario">

    <StackLayout Orientation="Vertical" Padding="20">
        <ListView x:Name="lstView" ItemsSource="{Binding Usuarios}" BackgroundColor="White">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <TextCell
                        Text="{Binding Nome}"
                        Detail="{Binding Apelido}"
                    />
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>
    </StackLayout>
</ContentPage>

Listusuarios.Cs:

using E_Tools.ViewModel;
using Xamarin.Forms;

namespace E_Tools.View
{
    //[XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class ListUsuario : ContentPage
    {
        public ListUsuario()
        {
            InitializeComponent();

            ToolbarItem itemUsuario = new ToolbarItem
            {
                Text = "Novo",
                Order = ToolbarItemOrder.Primary,
                Command = new Command(() => Navigation.PushAsync(new     Usuario()))
            };

            ToolbarItems.Add(itemUsuario);

            BindingContext = new ListagemUsuarioViewModel();
        }
    }
}

List of users viewmodel.Cs:

using E_Tools.Model;
using E_Tools.Repository;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;
using Xamarin.Forms;

namespace E_Tools.ViewModel
{
    public class ListagemUsuarioViewModel : INotifyPropertyChanged
    {
        ObservableCollection<Usuario> Usuarios { get; set; }

        public event PropertyChangedEventHandler PropertyChanged;

        public ListagemUsuarioViewModel()
        {
            ICollection<Usuario> lstUsuarios = new UsuarioRepository<Usuario>().GetAll();

            Usuarios = new ObservableCollection<Usuario>();

            foreach (var item in lstUsuarios)
            {
                this.Usuarios.Add(item);
            }
        }

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}
xamarin xamarin-forms xamarin.android xamarin.ios

1 answer

1

Hi, have you tried changing your Observablecollection to public?

public class ListagemUsuarioViewModel : INotifyPropertyChanged
{
    public ObservableCollection<Usuario> Usuarios { get; set; }

    public event PropertyChangedEventHandler PropertyChanged;

    public ListagemUsuarioViewModel()
    {
        ICollection<Usuario> lstUsuarios = new UsuarioRepository<Usuario>().GetAll();

        Usuarios = new ObservableCollection<Usuario>();

        foreach (var item in lstUsuarios)
        {
            this.Usuarios.Add(item);
        }
    }

    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

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