lauffähige Grundversion erstellt

SewerStammGen/Commands/AsyncCommandBase.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace SewerStammGen.Commands
+{
+    internal abstract class AsyncCommandBase : ICommand
+    {
+        bool _isExecuting = false;
+        public event EventHandler? CanExecuteChanged;
+
+        public bool IsExecuting
+        {
+            get => _isExecuting;
+            set
+            {
+                _isExecuting = value;
+                CanExecuteChanged?.Invoke(this, new EventArgs());
+            }
+        }
+
+        protected void OnCanExecuteChanged()
+        {
+            CanExecuteChanged?.Invoke(this, new EventArgs());
+        }
+
+
+        public virtual bool CanExecute(object? parameter)
+        {
+            return !IsExecuting;
+        }
+
+        public async void Execute(object? parameter)
+        {
+            IsExecuting = true;
+            await ExecuteAsync(parameter);
+            IsExecuting = false;
+        }
+
+        public abstract Task ExecuteAsync(object? parameter);
+    }
+}

SewerStammGen/Commands/UpdateCurrentViewModelCommand.cs

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+using SewerStammGen.Enum;
+using SewerStammGen.Interface;
+using SewerStammGen.Interface.Navigator;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SewerStammGen.Commands
+{
+    internal class UpdateCurrentViewModelCommand : AsyncCommandBase
+    {
+        private INavigator _navigator;
+        private readonly IViewModelAbstractFactory _viewModelFactory;
+
+        public UpdateCurrentViewModelCommand(INavigator navigator, IViewModelAbstractFactory viewModelFactory)
+        {
+            _navigator = navigator;
+            _viewModelFactory = viewModelFactory;
+        }
+
+        public override async Task ExecuteAsync(object? parameter)
+        {
+            if(parameter is EMainWindowViewType)
+            {
+                EMainWindowViewType viewType = (EMainWindowViewType)parameter;
+                _navigator.CurrentViewModel = _viewModelFactory.CreateViewModel(viewType);
+            }
+        }
+    }
+}