Добавлен DataGrid на MainWindow для взаимодействия с компаниями. Добавлено новое Window - UsersWindow с аналогичным DataGrid. Добавлен диалог сохранения данных отдельной компании. Теперь ContractStatus в БД имеет тип int.

db-creation.sql

@@ -7,7 +7,7 @@ GO
 CREATE TABLE [Companies] (
     [CompanyId] int NOT NULL IDENTITY,
     [Name] nvarchar(max) NOT NULL,
-    [ContractStatus] varchar(15) NOT NULL CHECK ([ContractStatus] IN('NotReachedYet', 'Reached', 'Terminated')),
+    [ContractStatus] int NOT NULL CHECK ([ContractStatus] IN(0, 1, 2)),
 	CONSTRAINT [PK_CompanyId] PRIMARY KEY ([CompanyId])
 );
 GO
@@ -24,5 +24,6 @@ CREATE TABLE [Users] (
 GO
 
 INSERT INTO [Companies] (Name, ContractStatus) VALUES
-('Defend Studio', 'NotReachedYet')
+('Defend Studio', '0'),
+('Yandex Music', '1')
 GO

eCompanies/App.xaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Configuration;
 using System.Data;
 using System.Linq;
@@ -14,5 +15,29 @@ namespace eCompanies
     /// </summary>
     public partial class App : Application
     {
+        private void addCompany(Companies c)
+        {
+            using (var db = new CompaniesDBContext())
+            {
+                db.Companies.Add(new Companies { Name = "Unknown company", ContractStatus = (int) Status.NotReachedYet });
+                var count = db.SaveChanges();
+            }
+        }
+
+        public static ObservableCollection<Companies> getCompanies()
+        {
+            using (var db = new CompaniesDBContext())
+                return new ObservableCollection<Companies>(db.Companies.AsEnumerable<Companies>()); 
+        }
+
+        public static void updateCompany(Companies c)
+        {
+            using (var db = new CompaniesDBContext())
+            {
+                db.Companies.Update(c);
+                db.SaveChanges();
+            }
+        }
+
     }
 }

eCompanies/Companies.cs

@@ -3,9 +3,9 @@ using System.Collections.Generic;
 
 namespace eCompanies
 {
+    public enum Status { NotReachedYet, Reached, Terminated }
     public partial class Companies
     {
-        public enum Status { NotReachedYet, Reached, Terminated }
         public Companies()
         {
             Users = new HashSet<Users>();
@@ -13,8 +13,7 @@ namespace eCompanies
 
         public int CompanyId { get; set; }
         public string Name { get; set; }
-        public string ContractStatus { get; set; }
-
+        public int ContractStatus { get; set; }  
         public ICollection<Users> Users { get; set; }
     }
 }

eCompanies/CompaniesDBContext.cs

@@ -33,9 +33,7 @@ namespace eCompanies
                 entity.HasKey(e => e.CompanyId);
 
                 entity.Property(e => e.ContractStatus)
-                    .IsRequired()
-                    .HasMaxLength(15)
-                    .IsUnicode(false);
+                    .IsRequired();
 
                 entity.Property(e => e.Name).IsRequired();
             });

eCompanies/MainWindow.xaml

@@ -4,10 +4,23 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:eCompanies"
+        xmlns:core="clr-namespace:System;assembly=mscorlib"
         mc:Ignorable="d"
         Title="MainWindow" Height="450" Width="800">
+    <Window.Resources>
+        <ObjectDataProvider x:Key="Status" MethodName="GetValues" ObjectType="{x:Type core:Enum}">
+            <ObjectDataProvider.MethodParameters>
+                <x:Type Type="local:Status"/>
+            </ObjectDataProvider.MethodParameters>
+        </ObjectDataProvider>
+    </Window.Resources>
     <Grid>  
-        <TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="75,50,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Height="305" Width="625"/>
-
+        <DataGrid x:Name="companyGrid" HorizontalAlignment="Left" Height="354" Margin="10,55,0,0" VerticalAlignment="Top" Width="772" ItemsSource="{Binding}" AutoGenerateColumns="False" MouseDoubleClick="companyGrid_MouseDoubleClick">
+            <DataGrid.Columns>
+                <DataGridTextColumn Header="ID"  Binding="{Binding CompanyId}" IsReadOnly="True"/>
+                <DataGridTextColumn Header="Название компании" Binding="{Binding Name}"/>
+                <DataGridComboBoxColumn x:Name="companyGridBox" Header="Состояние контракта" SelectedItemBinding="{Binding ContractStatus}" ItemsSource="{Binding Source={StaticResource Status}}"/>
+            </DataGrid.Columns>
+        </DataGrid>
     </Grid>
 </Window>

eCompanies/MainWindow.xaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -20,31 +21,24 @@ namespace eCompanies
     /// </summary>
     public partial class MainWindow : Window
     {
+        UsersWindow usersWindowInstance = null;
         public MainWindow()
         {
             InitializeComponent();
-            doSomethingWithDb();
+            addTextToBlock();
         }
         
-
-        private void addTextToBlock(string str = "")
+        private void addTextToBlock()
         {
-            textBlock.Text += ("\n" + str);
+            companyGrid.DataContext = App.getCompanies();
         }
 
-        private void doSomethingWithDb()
+        private void companyGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
         {
-            using (var db = new CompaniesDBContext())
-            {
-                db.Companies.Add(new Companies { Name = "Unknown company", ContractStatus = Companies.Status.NotReachedYet.ToString() });
-                var count = db.SaveChanges();
-                addTextToBlock(count + " records saved to database");
-
-                addTextToBlock();
-                addTextToBlock("All companies in database:");
-                foreach (var company in db.Companies)
-                    addTextToBlock(" - " + company.Name);
-            }
+            Companies company = (Companies)companyGrid.CurrentItem;
+            if (usersWindowInstance != null) usersWindowInstance.Close();
+            usersWindowInstance = new UsersWindow(company);
+            usersWindowInstance.Show();
         }
     }
 }

eCompanies/UsersWindow.xaml

@@ -0,0 +1,29 @@
+<Window x:Class="eCompanies.UsersWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:eCompanies"
+        mc:Ignorable="d"
+        Title="UsersWindow" Height="450" Width="800" Closing="Window_Closing">
+    <Grid>
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition/>
+            <ColumnDefinition Width="0*"/>
+        </Grid.ColumnDefinitions>
+        <DataGrid x:Name="usersGrid" HorizontalAlignment="Left" Height="354" Margin="10,55,0,0" VerticalAlignment="Top" Width="772" ItemsSource="{Binding}" AutoGenerateColumns="False" MouseDoubleClick="usersGrid_MouseDoubleClick">
+            <DataGrid.Columns>
+                <DataGridTextColumn Header="ID"  Binding="{Binding UsersId}"/>
+                <DataGridTextColumn Header="Имя пользователя" Binding="{Binding Name}" />
+                <DataGridTextColumn Header="Логин" Binding="{Binding Login}" />
+                <DataGridTextColumn Header="Пароль" Binding="{Binding Password}" />
+            </DataGrid.Columns>
+        </DataGrid>
+        <TextBox x:Name="companyNameBox" HorizontalAlignment="Left" Height="40" Margin="10,10,0,0" TextWrapping="Wrap" Text="none" VerticalAlignment="Top" Width="470" FontSize="22"/>
+        <ComboBox x:Name="contractStatusComboBox" HorizontalAlignment="Left" Height="40" Margin="490,10,0,0" VerticalAlignment="Top" Width="292" FontSize="22">
+            <ComboBoxItem>Еще не заключен</ComboBoxItem>
+            <ComboBoxItem>Заключен</ComboBoxItem>
+            <ComboBoxItem>Расторгнут</ComboBoxItem>
+        </ComboBox>
+    </Grid>
+</Window>

eCompanies/UsersWindow.xaml.cs

@@ -0,0 +1,44 @@
+using System;
+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.Shapes;
+
+namespace eCompanies
+{
+    /// <summary>
+    /// Логика взаимодействия для UsersWindow.xaml
+    /// </summary>
+    public partial class UsersWindow : Window
+    {
+        Companies currentCompany;
+        public UsersWindow(Companies c)
+        {
+            InitializeComponent();
+            currentCompany = c;
+            companyNameBox.Text = c.Name;
+            contractStatusComboBox.SelectedIndex = c.ContractStatus;
+            usersGrid.DataContext = new ObservableCollection<Users>(c.Users.AsEnumerable<Users>());
+        }
+
+        private void usersGrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
+        {
+        }
+
+        private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
+        {
+            MessageBoxResult mbr = MessageBox.Show("Вы закрываете окно с компанией. Хотите сохранить результаты?", "Сохранение изменений", MessageBoxButton.YesNo);
+            if (mbr == MessageBoxResult.Yes)
+                App.updateCompany(currentCompany);
+        }
+    }
+}

eCompanies/eCompanies.csproj

@@ -140,6 +140,9 @@
     </ApplicationDefinition>
     <Compile Include="CompaniesDBContext.cs" />
     <Compile Include="Users.cs" />
+    <Compile Include="UsersWindow.xaml.cs">
+      <DependentUpon>UsersWindow.xaml</DependentUpon>
+    </Compile>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -153,6 +156,10 @@
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Page Include="UsersWindow.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">