DaSaSo/DaSaSo.ViewModel/ProjectListViewModel.cs

using DaSaSo.Domain.Model;
using DaSaSo.Domain.Services;
using DaSaSo.EntityFramework.Services;
using DaSaSo.ViewModel.Commands;
using DaSaSo.ViewModel.Interface;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace DaSaSo.ViewModel
{
    public class ProjectListViewModel : BaseViewModel
    {
        private ProjectDataService genericDataService;
        
        private IActualProject actualProject;
        private IRenavigator renavigator;
        public ObservableCollection<Project> Projekte { get; }
        private Project? _selectedProject;

        public Project SelectedProject
        {
            get => _selectedProject;
            set
            {
                if(_selectedProject != value)
                {
                    _selectedProject = value;
                    OnPropertyChanged();
                }
            }
        }

        public ICommand SelectCommand { get; set; }
        public ProjectListViewModel(IDataService<Project> genericDataService, IActualProject actualProject, IRenavigator renavigator)
        {
            Projekte = new ObservableCollection<Project>();
            if (genericDataService == null) throw new ArgumentNullException("genericDataService");
            
            this.genericDataService = (genericDataService as ProjectDataService);
            this.actualProject = actualProject;
            this.renavigator = renavigator;
            SelectCommand = new SelectProjectCommand(actualProject, this);
            LoadProjecte();
        }

        public async void LoadProjecte()
        {

            var projekte = await genericDataService.GetAllByClient(actualProject.AktuellClient);
            //
            InitCollection(Projekte, projekte);

            
        }

        private void InitCollection(ObservableCollection<Project> target, IEnumerable<Project> source)
        {
            target.Clear();
            foreach (var i in source)
                target.Add(i);
        }
    }
}