first edit

XLIMS.DEV/ViewModels/DeviceViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Text;
+using System.Windows.Input;
+using XLIMS.CONTRACT;
+using XLIMS.DATA.Models;
+using XLIMS.MVVM.Base;
+
+namespace XLIMS.DEV.ViewModels
+{
+    public class DeviceViewModel : ViewModelBase
+    {
+        #region Constructor
+        public DeviceViewModel(ILimsService limsService,Spoi spoi, Tip tip = null)
+        {
+            _limsService = limsService;
+            if (tip != null) _tip = tip;
+            else _tip = new Tip() {IdspoiNavigation=spoi };
+            LoadSpnmtpAsync();
+        }
+        #endregion //Constructor
+
+        #region Events
+        #endregion //Events
+
+        #region Fields
+        private readonly ILimsService _limsService;
+        private readonly Tip _tip;
+        private Spnmtp _currentSpnmtp;
+        #endregion //Fields
+
+        #region Properties
+        public ObservableCollection<Spnmtp> AllSpnmtps { get; set; } = new();
+        public Spnmtp CurrentSpnmtp
+        {
+            get=> _currentSpnmtp;
+            set
+            {
+                _currentSpnmtp = value;
+                if (_currentSpnmtp != null) _tip.IdspnmtpNavigation = _currentSpnmtp;
+                OnPropertyChanged();
+            }
+        }
+        public string? Tp
+        {
+            get => _tip.Tp;
+            set { _tip.Tp = value; OnPropertyChanged(); }
+        }
+        public int Id => _tip.Id;
+        #endregion //Properties
+
+        #region Methods
+        public async Task LoadSpnmtpAsync()
+        {
+
+            try
+            {
+                // Параллельная загрузка данных из разных доменов через подсервисы
+                var spnmtpsTask = await _limsService.Spnmtps.GetAllAsync();
+
+                AllSpnmtps = new ObservableCollection<Spnmtp>(spnmtpsTask);
+                OnPropertyChanged(nameof(AllSpnmtps));
+            }
+            finally
+            {
+            }
+        }
+        private async Task SaveAsync()
+        {
+            if (_tip.Id == 0) await _limsService.Tips.AddAsync(_tip);
+            else await _limsService.Tips.UpdateAsync(_tip);
+        }
+        public async Task Remove()
+        {
+            await _limsService.Tips.RemoveAsync(_tip);
+        }
+        #endregion //Methods
+
+        #region Commands
+        public ICommand SaveCommand => new AsyncRelayCommand(SaveAsync);
+        #endregion //Commands
+    }
+}

XLIMS.DEV/ViewModels/MainViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Text;
+using System.Windows.Input;
+using XLIMS.CONTRACT;
+using XLIMS.DATA.Models;
+using XLIMS.MVVM.Base;
+using XLIMS.DEV.Views;
+
+namespace XLIMS.DEV.ViewModels
+{
+    public class MainViewModel : ViewModelBase,IActivityViewModel
+    {
+        #region Constructor
+        public MainViewModel(ILimsService limsService, IDialogService dialogService)
+        {
+            _limsService = limsService;
+            _dialogService = dialogService;
+            //LoadSpoiAsync();
+        }
+        #endregion //Constructor
+
+        #region Events
+      
+        #endregion //Events
+
+        #region Fields
+        private readonly IDialogService _dialogService;
+        private readonly ILimsService _limsService;
+        #endregion //Fields
+
+        #region Properties
+        public string Title => "Приборы";
+        public object View => new MainView();
+        #endregion //Properties
+
+        #region Methods
+       
+        #endregion //Methods
+
+        #region Commands
+       
+
+        
+        #endregion //Commands
+    }
+}