Blazor ContextComponentBase (for MVVM)

ContextComponentBase.cs

    /// <summary>
    /// ComponentBase with DataContext
    /// </summary>
    public class ContextComponentBase : ComponentBase
    {
        /// <summary>
        /// 
        /// </summary>
        protected ViewModelBase DataContext { get; set; }

        /// <inheritdoc />
        protected override async Task OnInitializedAsync()
        {
            if (DataContext == null) return;

            if (!DataContext.Initialized) // do once
            {
                await DataContext.InitializeAsync();
                DataContext.PropertyChanged += (s, e) => StateHasChanged();
            }

            await base.OnInitializedAsync();
        }
    }

ViewModelBase.cs

    public class ViewModelBase : INotifyPropertyChanged
    {
        /// <summary>
        /// Flag indicator if ViewModel was initialized. Set to true by InitializeAsync Method
        /// Used to avoid double initialization for ServerPrerendered mode
        /// </summary>
        public bool Initialized { get; set; }

        /// <summary>
        /// Initialize view model
        /// </summary>
        /// <returns></returns>
        /// <remarks>This method should not use any JSInterop if render mode is ServerPrerendered</remarks>
        public virtual Task InitializeAsync()
        {
            Initialized = true;
            return Task.CompletedTask;
        } 

        /// <summary>
        /// 
        /// </summary>
        public event PropertyChangedEventHandler PropertyChanged;
        /// <summary>
        /// 
        /// </summary>
        /// <param name="propertyName"></param>
        [NotifyPropertyChangedInvocator]
        // ReSharper disable once UnusedMember.Global
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }

Hi, I am very interested in your work.
I would like to test but I cannot find the namespace for [NotifyPropertyChangedInvocator] (I am in .net Standard 2.1)

Regards,

Christophe

@ptirouz this is an attribute which is added by ReSharper
it's used by ReSharper to easily generate properties with change notification
You can safely delete it.

Thanks !