Реализовано полноценное сохранение удаленных и редактированных объектов в MainWindow

eCompanies/App.xaml.cs

@@ -24,7 +24,7 @@ namespace eCompanies
                 return new HashSet<Users>(db.Users.Where(b => b.CompanyId.Equals(id)));
         }
         
-        private void addCompany(Company c)
+        public static void addCompany(Company c)
         {
             using (var db = new CompaniesDBContext())
             {
@@ -42,6 +42,15 @@ namespace eCompanies
             }
         }
 
+        public static void updateCompany1(Company c)
+        {
+            //using (var db = new CompaniesDBContext())
+            //{
+            //    var x = db.Company.Where(i => i.CompanyId.Equals(c.CompanyId));
+            //    foreach (Company t in x) t = c;
+            //}
+        }
+
         public static void removeCompany(int id)
         {
             using (var db = new CompaniesDBContext())

eCompanies/CompaniesDBContext.cs

@@ -38,6 +38,7 @@ namespace eCompanies
                 entity.Property(e => e.Name).IsRequired();
 
                 entity.Ignore("contract");
+                entity.Ignore("needUpdate");
             });
 
             modelBuilder.Entity<Users>(entity =>

eCompanies/Company.cs

@@ -16,5 +16,8 @@ namespace eCompanies
         public string Name { get; set; }
         public int ContractStatus { get; set; }  
         public ICollection<Users> Users { get; set; }
+
+
+        public bool needUpdate { get; set; }
     }
 }

eCompanies/MainWindow.xaml

@@ -8,7 +8,7 @@
         Title="MainWindow" Height="450" Width="800" Closing="Window_Closing">
     <Grid>
         <DataGrid x:Name="companyGrid" HorizontalAlignment="Left" Height="399" Margin="10,10,0,0" VerticalAlignment="Top" 
-                  Width="772" ItemsSource="{Binding}" AutoGenerateColumns="False">
+                  Width="772" ItemsSource="{Binding}" AutoGenerateColumns="False" CellEditEnding="companyGrid_CellEditEnding">
             <DataGrid.Resources>
                 <ContextMenu x:Key="RowMenu" 
                     DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">

eCompanies/MainWindow.xaml.cs

@@ -2,17 +2,8 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 
 namespace eCompanies
 {
@@ -22,9 +13,8 @@ namespace eCompanies
     public delegate void UpdateCompanyGridDelegate(Company updatingCompany);
     public partial class MainWindow : Window
     {
-        List<int> deletingCompanyList = new List<int>();
-        List<int> updatingCompanyList = new List<int>();
         UsersWindow usersWindowInstance = null;
+        List<int> deletingCompanyList = new List<int>();
 
         public MainWindow()
         {
@@ -35,7 +25,7 @@ namespace eCompanies
         private void updateCompanyItem(Company updatingCompany)
         {
             if (updatingCompany == null) return;
-            updatingCompanyList.Add(updatingCompany.CompanyId);
+            updatingCompany.needUpdate = true;
             var context = ((ObservableCollection<Company>)companyGrid.DataContext).ToList<Company>();
             for (int i = 0; i < context.Count; i++)
             { 
@@ -43,7 +33,6 @@ namespace eCompanies
                 {
                     context[i] = updatingCompany;
                     companyGrid.DataContext = new ObservableCollection<Company>(context);
-                    updatingCompanyList.Add(updatingCompany.CompanyId);
                     return;
                 }
             }
@@ -108,13 +97,18 @@ namespace eCompanies
                     else if (mbr == MessageBoxResult.No)
                         return;
                 }
-
-                if (deletingCompanyList != null)
-                    App.removeCompany(deletingCompanyList);
-                deletingCompanyList = null;
-                // TODO: реализация обновления старых компаний и добавления новых
+                if (c.CompanyId == 0)
+                    App.addCompany(c);
+                else if (c.needUpdate)
+                    App.updateCompany(c);
             }
+            if (deletingCompanyList != null)
+                App.removeCompany(deletingCompanyList);
+        }
 
+        private void companyGrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
+        {
+            ((Company)e.Row.Item).needUpdate = true;
         }
     }
 }