Projekte können erstellt und geladen werden

SewerStammGen/ViewModel/State/ActualState.cs

@@ -0,0 +1,30 @@
+using Shared.Domain;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SewerStammGen.WPF.ViewModel.State
+{
+    internal class ActualState : IActualState
+    {
+        public int ProjektID { get; private set; }
+
+        public void SetProjekt(Projekt projekt, bool notification = true)
+        {
+            ProjektID = projekt.Id;
+            if(notification)
+            {
+                OnProjektChanged();
+            }
+        }
+
+
+        public event EventHandler? ProjektChanged;
+        private void OnProjektChanged()
+        {
+            ProjektChanged?.Invoke(this, new EventArgs());
+        }
+    }
+}

SewerStammGen/ViewModel/State/IActualState.cs

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+using Shared.Domain;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SewerStammGen.WPF.ViewModel.State
+{
+    public interface IActualState
+    {
+        event EventHandler? ProjektChanged;
+        
+        int ProjektID { get; }
+
+        void SetProjekt(Projekt projekt, bool notification = true);
+    }
+}

SewerStammGen/ViewModel/State/Navigation/ViewModelDelegateRenavigator.cs

@@ -0,0 +1,25 @@
+using SewerStammGen.WPF.Interface.Navigator;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SewerStammGen.WPF.ViewModel.State.Navigation
+{
+    internal class ViewModelDelegateRenavigator<TViewModel> : IRenavigator where TViewModel : BaseViewModel
+    {
+        private readonly IMainWindowNavigator _navigator;
+        private readonly CreateViewModel<TViewModel> _createViewModel;
+
+        public ViewModelDelegateRenavigator(IMainWindowNavigator navigator, CreateViewModel<TViewModel> createViewModel)
+        {
+            _navigator = navigator;
+            _createViewModel = createViewModel;
+        }
+        public void Renavigate()
+        {
+            _navigator.CurrentViewModel = _createViewModel();
+        }
+    }
+}