Error handling system added

Views/NewEquipmentDialog.axaml.cs

@@ -2,6 +2,7 @@
 using Avalonia.Controls;
 using CommunityToolkit.Mvvm.Messaging;
 using GazpromApp.Messages;
+using GazpromApp.ViewModels;
 
 namespace GazpromApp.Views;
 
@@ -11,14 +12,26 @@ public partial class NewEquipmentDialog : Window
     {
         InitializeComponent();
         
+        // done entering new equipment
         WeakReferenceMessenger.Default.Register<NewEquipmentDialog, NewEquipmentDone>(this, static (w, m) =>
         {
             w.Close(m.Equipment);
         });
+        
+        // register to work with errors
+        WeakReferenceMessenger.Default.Register<NewEquipmentDialog, ErrorMessage>(this, static (w, m) =>
+        {
+            ErrorView dialog = new ErrorView()
+            {
+                DataContext = m.Error
+            };
+            m.Reply(dialog.ShowDialog<ErrorViewModel?>(w));
+        });
     }
 
     private void Window_OnClosed(object? sender, EventArgs e)
     {
         WeakReferenceMessenger.Default.Unregister<NewEquipmentDone>(this);
+        WeakReferenceMessenger.Default.Unregister<ErrorMessage>(this);
     }
 }