dataGrid doesn't update when item property has changed

Question

So I have almost identical thing set up with TextBoxes/ListBoxes and so on but it just doesn't seem to work with dataGrid..

So I have a view Index which contains dataGrid.

I created a IndexModel class which is as follows:

public class IndexModel : INotifyPropertyChanged
{
    private ObservableCollection<Schedule> _schedules;

    public IndexModel(ObservableCollection<Schedule> schedules)
    {
        _schedules = schedules;
    }

    public ObservableCollection<Schedule> Schedules
    {
        get { return _schedules; }
        set
        {
            _schedules = value;
            OnPropertyChanged();
        }
    }
    public event PropertyChangedEventHandler PropertyChanged;

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

Then in my IndexView I create IndexModel.

    private ObservableCollection<Schedule> _schedules;

    public Index(MainController controller)
    {
        _controller = controller;
        InitializeComponent();
        _schedules = controller.DatabaseController.GetSchedules() as ObservableCollection<Schedule>;

        DataContext = new IndexModel(_schedules);
        Log.Info($"UI Component {componentName} loaded succesfully",componentName, Source);
    }

I create the DataContext and bind it in XAML

ItemsSource="{Binding Path=Schedules, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" 

I even created a simple void.

Schedule selectedItem = (Schedule) dataGrid.SelectedItem;
selectedItem.Name = "Testing";

And it updates the ObservableCollection yet dataGrid doesn't update...

I looked through all the answers of stackoverflow and such but still could not fix my problem..

public partial class Schedule
{
    public int Id { get; set; }

    [Required]
    [StringLength(50)]
    public string Name { get; set; }

    public DateTime DateFrom { get; set; }

    public DateTime DateTo { get; set; }

    public virtual User User { get; set; }

    [StringLength(256)]
    public string Comment { get; set; }

    [StringLength(256)]
    public string Description { get; set; }

    [Required]
    public Priorities Priority { get; set; }

    public virtual UpdaterObject Object { get; set; }

    public virtual ICollection<ScheduleAction> ScheduleAction { get; set; }

Answer 1

Schedule needs to implement INotifyPropertyChanged and raise PropertyChanged when its Name property value changes.

Answer 2

According to your example, what should work is if you add or delete a Schedule dynamically in the collection.

But if you want to update a given Schedule from the UI like:

selectedItem.Name = "Testing";

What you want is to update a Shedule item itself, not the collection of Schedule.

In other words you need a viewModel for the Schedule if you want it to be edited in your view. Also you need to provide a data Template for the Shedule to let WPF know how it is suppose to render a Shedule.

Hope it helps.