Add ViewModel.StateHasChanged

src/BitzArt.Blazor.MVVM/Components/IPersistentComponent.cs

@@ -5,4 +5,6 @@ namespace BitzArt.Blazor.MVVM;
 internal interface IPersistentComponent : IComponent
 {
     internal PersistentComponentState ComponentState { get; }
+
+    internal void StateHasChanged();
 }

src/BitzArt.Blazor.MVVM/Components/PageBase.cs

@@ -21,6 +21,8 @@ public abstract class PageBase<TViewModel> : ComponentBase, IPersistentComponent
     [Inject]
     protected TViewModel ViewModel { get; set; } = null!;
 
+    PersistentComponentState IPersistentComponent.ComponentState => throw new NotImplementedException();
+
     /// <summary>
     /// Method invoked when the component is ready to start, having received its initial
     /// parameters from its parent in the render tree. Override this method if you will
@@ -40,4 +42,9 @@ private async Task PersistStateAsync()
     {
         await ViewModel.PersistStateAsync();
     }
+
+    void IPersistentComponent.StateHasChanged()
+    {
+        StateHasChanged();
+    }
 }

src/BitzArt.Blazor.MVVM/ViewModels/PageViewModel.cs

@@ -81,4 +81,12 @@ internal override Task PersistStateAsync()
 
         return Task.CompletedTask;
     }
+
+    /// <summary>
+    /// Notifies the component that the state has changed.
+    /// </summary>
+    protected void StateHasChanged()
+    {
+        Component.StateHasChanged();
+    }
 }