Нифига на рандом написал работающий код

ROGOZ/Pages/AddEditPage.xaml

@@ -42,7 +42,7 @@
             <StackPanel Orientation="Vertical">
                 <TextBlock Text="Исполнитель:" FontSize="25" FontFamily="Comic Sans Ms" Foreground="#52a8ff" HorizontalAlignment="Left" Width="220" Margin="50,0,0,5"/>
                 <!--<ComboBox x:Name="CmbExecutor" Style="{DynamicResource ComboBoxStyle1}" ItemContainerStyle="{DynamicResource AddTaskCmbItem}" Text="{Binding ExecutorID}" DisplayMemberPath="ID" Width="770" HorizontalAlignment="Left" Margin="25,0,0,0"/>-->
-                <ComboBox x:Name="CmbExecutor" Style="{DynamicResource ComboBoxStyle1}" ItemContainerStyle="{DynamicResource AddTaskCmbItem}" Width="770" HorizontalAlignment="Left" Margin="25,0,0,0"/>
+                <ComboBox x:Name="CmbExecutor" Text="{Binding ExecutorID}" DisplayMemberPath="MiddleName" SelectedValuePath="ID" Style="{DynamicResource ComboBoxStyle1}" ItemContainerStyle="{DynamicResource AddTaskCmbItem}" Width="770" HorizontalAlignment="Left" Margin="25,0,0,0"/>
             </StackPanel>
 
             <StackPanel Orientation="Horizontal">

ROGOZ/Pages/AddEditPage.xaml.cs

@@ -23,7 +23,6 @@ namespace ROGOZ.Pages
     public partial class AddEditPage : Page
     {
         private user1Entities _context = new user1Entities();
-        private List<User> listUsers = new List<User>();
         private Task _currentTask = null;
 
         
@@ -33,17 +32,9 @@ namespace ROGOZ.Pages
             DataContext = _currentTask;
             CmbStatus.ItemsSource = Status.FillStatus();
             CmbTaskType.ItemsSource = WorkType.FillWorkType();
+            //CmbExecutor.ItemsSource = user1Entities.GetContext().Executor.ToList();
 
-            //foreach (var user in _context.User.ToList())
-            //{
-            //    listUsers.Add(user.getFamilia());
-            //}
-            //CmbExecutor.ItemsSource = listUsers;
-
-            //listUsers = _context.User.ToList();
-            //CmbExecutor.ItemsSource = listUsers;
-            //CmbExecutor.ItemsSource = listUsers.Select(user => user.getFamilia());
-            //CmbExecutor.DisplayMemberPath = "getFamilia";
+            CmbExecutor.ItemsSource = _context.User.Where(u=>u.Executor != null).ToList();
         }
 
         public AddEditPage(Task selectedTask)
@@ -51,23 +42,14 @@ namespace ROGOZ.Pages
             InitializeComponent();
             _currentTask = selectedTask;
             CmbStatus.ItemsSource = Status.FillStatus();
-            //CmbExecutor.ItemsSource = user1Entities.GetContext().User.ToList();
+            //CmbExecutor.ItemsSource = user1Entities.GetContext().Executor.ToList();
+
+            CmbExecutor.ItemsSource = _context.User.Where(u => u.Executor != null).ToList();
+
             CmbTaskType.ItemsSource = WorkType.FillWorkType();
             if (selectedTask != null)
                 _currentTask = selectedTask;
             DataContext = _currentTask;
-
-            //foreach (var user in _context.User.ToList())
-            //{
-            //    listUsers.Add(user.getFamilia());
-            //}
-            //CmbExecutor.ItemsSource = listUsers;
-            //CmbExecutor.ItemsSource = _currentTask.Executor.User.getFamilia();
-            listUsers = _context.User.ToList();
-            CmbExecutor.ItemsSource = listUsers;
-            //CmbExecutor.ItemsSource = listUsers.Select(user => user.getFamilia());
-            //CmbExecutor.DisplayMemberPath = "getFamilia";
-            //CmbExecutor.ItemsSource = listUsers.Select(user => user.getFamilia());
         }
         private void BtnCancel_Click(object sender, RoutedEventArgs e)
         {
@@ -104,6 +86,7 @@ namespace ROGOZ.Pages
                         {
                             //ExecutorID = int.Parse(CmbExecutor.SelectedItem.ToString()),
                             ExecutorID = (CmbExecutor.SelectedItem as User)?.ID ?? 0,
+                            //ExecutorID =int.Parse(CmbExecutor.Text),
                             Title = TaskNameTB.Text,
                             Description = TaskDescriptionTB.Text,
                             CreateDateTime = DateTime.Parse(DPCreateDateTime.Text),
@@ -119,33 +102,6 @@ namespace ROGOZ.Pages
                         MessageBox.Show("Задача добавлена");
                         NavigationService.GoBack();
 
-                        //var selectedUser = listUsers.FirstOrDefault(user => user.getFamilia() == CmbExecutor.SelectedItem.ToString());
-                        //if (selectedUser != null)
-                        //{
-                        //    var selectedTask = new Task
-                        //    {
-                        //        //ExecutorID = int.Parse(CmbExecutor.SelectedItem.ToString()),
-                        //        ExecutorID = (CmbExecutor.SelectedItem as User)?.ID ?? 0,
-                        //        //ExecutorID = selectedUser.ID,
-                        //        Title = TaskNameTB.Text,
-                        //        Description = TaskDescriptionTB.Text,
-                        //        CreateDateTime = DateTime.Parse(DPCreateDateTime.Text),
-                        //        Deadline = DateTime.Parse(DPDeadLine.Text),
-                        //        Difficulty = Double.Parse(DifficultyTB.Text),
-                        //        Time = int.Parse(TimeTB.Text),
-                        //        Status = CmbStatus.Text,
-                        //        WorkType = CmbTaskType.Text,
-                        //        IsDeleted = false
-                        //    };
-                        //    user1Entities.GetContext().Task.Add(selectedTask);
-                        //    user1Entities.GetContext().SaveChanges();
-                        //    MessageBox.Show("Задача добавлена");
-                        //    NavigationService.GoBack();
-                        //}
-                        //else
-                        //{
-                        //    MessageBox.Show("Выберите исполнителя!");
-                        //}
                     }
                     catch
                     {

ROGOZ/User.cs

@@ -25,9 +25,9 @@ namespace ROGOZ
         public virtual Executor Executor { get; set; }
         public virtual Manager Manager { get; set; }
 
-        public string getFamilia()
-        {
-            return MiddleName;
-        }
+        //public string getFamilia()
+        //{
+        //    return MiddleName;
+        //}
     }
 }