wpf c＃DependencyPropertyを介して2つのビューモデルをバインドする

Question

マスターディテール関係で2つのビューモデルを使用してビューを作成したいとします。

1つのマスタービューモデルのSelectedCustomerを詳細ビューモデルのSelectedCustomerにバインドしたいとします。私はDependencyPropertyの実装は仕事をすることができますが、私は親ビューで別の顧客を選択するので、プロパティは更新されていないことをお読みください。私は間違って何をしているすべてのアイデア？

おかげ

のviewmodelsのコードである：ビューのXAMLである

namespace BindingViewModels.ViewModels 
{ 
    public class vmCustomers : INotifyPropertyChanged 
    { 
     protected ObservableCollection<Customer> _customers; 
     protected Customer _SelectedCustomer = null; 
     public event PropertyChangedEventHandler PropertyChanged; 

     public vmCustomers() 
     { 
      _customers = new ObservableCollection<Customer>(); 

      _customers.Add(new Customer() { CustomerID = 1, CustName = "John Doe" }); 
      _customers.Add(new Customer() { CustomerID = 2, CustName = "Johny Walker" }); 
      _customers.Add(new Customer() { CustomerID = 3, CustName = "Joe Foreman" }); 
      _customers.Add(new Customer() { CustomerID = 4, CustName = "Mike Tyson" }); 
      _customers.Add(new Customer() { CustomerID = 5, CustName = "Salvatore Ferragamo" }); 
      _customers.Add(new Customer() { CustomerID = 6, CustName = "Pato Donald" }); 
     } 

     public ObservableCollection<Customer> Customers 
     { 
      get { return _customers; } 
      set { _customers = value; } 
     } 

     public Customer SelectedCustomer 
     { 
      get 
      { 
       return _SelectedCustomer; 
      } 

      set 
      { 
       _SelectedCustomer = value; 
       OnPropertyChanged("SelectedCustomer"); 
      } 
     } 

     protected void OnPropertyChanged(string name) 
     { 
      PropertyChangedEventHandler handler = PropertyChanged; 
      if (handler != null) 
       handler(this, new PropertyChangedEventArgs(name)); 
     } 
    } 

    public class vmOrders : DependencyObject 
    { 
     public static readonly DependencyProperty SelectedCustomerProperty = 
      DependencyProperty.Register("SelectedCustomer", 
       typeof(Customer), 
       typeof(vmOrders), 
       new PropertyMetadata(default(Customer), OnItemsPropertyChanged)); 

     private static void OnItemsPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      throw new NotImplementedException(); 
     } 

     protected ObservableCollection<Order> _AllOrders; 
     protected ObservableCollection<Order> _CustomerOrders = null; 
     protected Customer _SelectedCustomer = null; 

     public vmOrders() 
     { 
      _AllOrders = new ObservableCollection<Order>(); 

      _AllOrders.Add(new Order() { OrderID = 1, CustomerID = 1, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 100 }); 
      _AllOrders.Add(new Order() { OrderID = 2, CustomerID = 1, Date = System.DateTime.Parse("2017-01-02"), TotalAmount = 200 }); 
      _AllOrders.Add(new Order() { OrderID = 3, CustomerID = 1, Date = System.DateTime.Parse("2017-01-03"), TotalAmount = 300 }); 
      _AllOrders.Add(new Order() { OrderID = 4, CustomerID = 1, Date = System.DateTime.Parse("2017-01-04"), TotalAmount = 400 }); 
      _AllOrders.Add(new Order() { OrderID = 5, CustomerID = 2, Date = System.DateTime.Parse("2017-01-05"), TotalAmount = 500 }); 
      _AllOrders.Add(new Order() { OrderID = 6, CustomerID = 2, Date = System.DateTime.Parse("2017-01-06"), TotalAmount = 600 }); 
      _AllOrders.Add(new Order() { OrderID = 7, CustomerID = 3, Date = System.DateTime.Parse("2017-01-07"), TotalAmount = 700 }); 
      _AllOrders.Add(new Order() { OrderID = 8, CustomerID = 3, Date = System.DateTime.Parse("2017-01-08"), TotalAmount = 800 }); 
      _AllOrders.Add(new Order() { OrderID = 9, CustomerID = 3, Date = System.DateTime.Parse("2017-01-09"), TotalAmount = 900 }); 
      _AllOrders.Add(new Order() { OrderID = 10, CustomerID = 3, Date = System.DateTime.Parse("2017-01-10"), TotalAmount = 1000 }); 
      _AllOrders.Add(new Order() { OrderID = 11, CustomerID = 3, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1200 }); 
      _AllOrders.Add(new Order() { OrderID = 12, CustomerID = 3, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1400 }); 
      _AllOrders.Add(new Order() { OrderID = 13, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1200 }); 
      _AllOrders.Add(new Order() { OrderID = 14, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5450 }); 
      _AllOrders.Add(new Order() { OrderID = 15, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5020 }); 
      _AllOrders.Add(new Order() { OrderID = 16, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5020 }); 
      _AllOrders.Add(new Order() { OrderID = 17, CustomerID = 5, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5030 }); 
      _AllOrders.Add(new Order() { OrderID = 18, CustomerID = 5, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5050 }); 
     } 

     public ObservableCollection<Order> Orders 
     { 
      get { 
       if (SelectedCustomer != null) 
        return _CustomerOrders; 
       else 
        return _AllOrders; 
      } 
      set { 
       _AllOrders = value; 
       if (SelectedCustomer != null) 
       { 
        var linqresults = _AllOrders.Where(o => o.CustomerID == _SelectedCustomer.CustomerID); 
        _CustomerOrders = new ObservableCollection<Order>(linqresults); 
       } 
       else 
       { 
        _CustomerOrders = null; 
       } 
      } 
     } 

     public Customer SelectedCustomer 
     { 
      get 
      { 
       return (Customer)GetValue(SelectedCustomerProperty); 
      } 

      set 
      { 
       SetValue(SelectedCustomerProperty, value); 
       _SelectedCustomer = SelectedCustomer; 
      } 
     } 
    } 

：

<Window x:Class="BindingViewModels.MainWindow" 
     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:BindingViewModels" 
     xmlns:ViewModels="clr-namespace:BindingViewModels.ViewModels" 
     xmlns:Views="clr-namespace:BindingViewModels.Views" 
     mc:Ignorable="d" 
     Title="MainWindow" Height="350" Width="525"> 
    <Window.Resources> 
     <DataTemplate DataType="{x:Type ViewModels:vmCustomers}"> 
      <Views:ViewCustomers/> 
     </DataTemplate> 
     <DataTemplate DataType="{x:Type ViewModels:vmOrders}"> 
      <Views:ViewOrders/> 
     </DataTemplate> 
    </Window.Resources> 
    <Grid> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="200"/> 
      <RowDefinition Height="*"/> 
     </Grid.RowDefinitions> 
     <ContentPresenter Grid.Row="0" Name="ContentCustomers" Content="{Binding ElementName=vmCustomersInstance}"> 
      <ContentPresenter.DataContext> 
       <ViewModels:vmCustomers x:Name="vmCustomersInstance"/> 
      </ContentPresenter.DataContext> 
     </ContentPresenter> 
     <ContentPresenter Grid.Row="1" Name="ContentOrders" Content="{Binding ElementName= vmOrdersInstance}" MouseEnter="ContentOrders_MouseEnter"> 
      <ContentPresenter.DataContext> 
       <ViewModels:vmOrders x:Name="vmOrdersInstance" SelectedCustomer="{Binding ElementName=vmCustomersInstance, Path=SelectedCustomer, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged}" /> 
      </ContentPresenter.DataContext> 
     </ContentPresenter> 
    </Grid> 
</Window> 

両方のビューは、グリッドとデータグリッドを持つユーザーコントロールです。

<UserControl x:Class="BindingViewModels.Views.ViewCustomers" 
.... 
<Grid> 
    <DataGrid Name="DataGrid" ItemsSource="{Binding Path=Customers}" SelectedItem="{Binding Path=SelectedCustomer}" AutoGenerateColumns="True" ScrollViewer.VerticalScrollBarVisibility="Visible"/> 
</Grid> 

<UserControl x:Class="BindingViewModels.Views.ViewOrders" 
.... 
<Grid> 
    <DataGrid Name="DataGrid" ItemsSource="{Binding Path=Orders}" AutoGenerateColumns="True" ScrollViewer.VerticalScrollBarVisibility="Visible"/> 
</Grid> 

Answer 1

多くの試みの後、私はついにそれを動作させました。

組み合わせビュー：

<Window x:Class="BindingVM2.MainWindow" 
     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:BindingVM2" 
     xmlns:ViewModels="clr-namespace:BindingVM2.ViewModels" 
     xmlns:Views="clr-namespace:BindingVM2.Views" 
     mc:Ignorable="d" 
     Title="MainWindow" Height="350" Width="525"> 
    <Window.Resources> 
     <DataTemplate DataType="{x:Type ViewModels:vmCustomers}"> 
      <Views:ViewCustomers/> 
     </DataTemplate> 
     <DataTemplate DataType="{x:Type ViewModels:vmOrders}"> 
      <Views:ViewOrders/> 
     </DataTemplate> 
     <ViewModels:vmCustomers x:Key="vmCustomerInstance" /> 
    </Window.Resources> 
    <Grid> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="200"/> 
      <RowDefinition Height="*"/> 
     </Grid.RowDefinitions> 
     <ContentPresenter Grid.Row="0" Name="ContentCustomers" Content="{StaticResource vmCustomerInstance}"/> 
     <ContentPresenter Grid.Row="1" Name="ContentOrders" Content="{Binding ElementName=vmOrdersInstance}"> 
      <ContentPresenter.DataContext> 
       <ViewModels:vmOrders x:Name="vmOrdersInstance" SelectedCustomer="{Binding Source={StaticResource vmCustomerInstance}, Path=SelectedCustomer , Mode=TwoWay}" /> 
      </ContentPresenter.DataContext> 
     </ContentPresenter> 
    </Grid> 
</Window> 

とのviewmodels：

public class vmCustomers : DependencyObject, INotifyPropertyChanged 
    { 
     protected ObservableCollection<Customer> _customers; 
     public event PropertyChangedEventHandler PropertyChanged; 

     public static DependencyProperty SelectedCustomerProperty = 
      DependencyProperty.Register("SelectedCustomer", typeof(Customer), typeof(vmCustomers), 
         new PropertyMetadata(default(Customer), new PropertyChangedCallback(OnSelectedCustomerChanged))); 

     private static void OnSelectedCustomerChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      Customer value = (Customer)e.NewValue; 
      vmCustomers vm = (vmCustomers)d; 

      vm.OnPropertyChanged("SelectedCustomer"); 
     } 

     public Customer SelectedCustomer 
     { 
      get { return (Customer)GetValue(SelectedCustomerProperty); } 
      set { SetValue(SelectedCustomerProperty, value); } 
     } 


     public vmCustomers() 
     { 
      _customers = new ObservableCollection<Customer>(); 

      _customers.Add(new Customer() { CustomerID = 1, CustName = "John Doe" }); 
      _customers.Add(new Customer() { CustomerID = 2, CustName = "Johny Walker" }); 
      _customers.Add(new Customer() { CustomerID = 3, CustName = "Joe Foreman" }); 
      _customers.Add(new Customer() { CustomerID = 4, CustName = "Mike Tyson" }); 
      _customers.Add(new Customer() { CustomerID = 5, CustName = "Salvatore Ferragamo" }); 
      _customers.Add(new Customer() { CustomerID = 6, CustName = "Pato Donald" }); 
     } 

     public ObservableCollection<Customer> Customers 
     { 
      get { return _customers; } 
      set { _customers = value; } 
     } 

     protected void OnPropertyChanged(string name) 
     { 
      PropertyChangedEventHandler handler = PropertyChanged; 
      if (handler != null) 
       handler(this, new PropertyChangedEventArgs(name)); 
     } 
    } 

    public class vmOrders : DependencyObject ,INotifyPropertyChanged 
    { 
     public event PropertyChangedEventHandler PropertyChanged; 
     protected ObservableCollection<Order> _AllOrders; 
     protected ObservableCollection<Order> _CustomerOrders = null; 

     public static DependencyProperty SelectedCustomerProperty = 
        DependencyProperty.Register("SelectedCustomer", typeof(Customer), typeof(vmOrders), 
         new FrameworkPropertyMetadata(default(Customer), new PropertyChangedCallback(OnSelectedCustomerPropertyChanged))); 

     private static void OnSelectedCustomerPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      Customer value = (Customer)e.NewValue; 
      vmOrders vm = (vmOrders)d; 

      vm.ApplyFilter(); 
      vm.OnPropertyChanged("Orders"); 
     } 

     public Customer SelectedCustomer 
     { 
      get {return (Customer)GetValue(SelectedCustomerProperty); } 
      set { SetValue(SelectedCustomerProperty, value); } 
     } 

     public vmOrders() 
     { 
      _AllOrders = new ObservableCollection<Order>(); 

      _AllOrders.Add(new Order() { OrderID = 1, CustomerID = 1, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 100 }); 
      _AllOrders.Add(new Order() { OrderID = 2, CustomerID = 1, Date = System.DateTime.Parse("2017-01-02"), TotalAmount = 200 }); 
      _AllOrders.Add(new Order() { OrderID = 3, CustomerID = 1, Date = System.DateTime.Parse("2017-01-03"), TotalAmount = 300 }); 
      _AllOrders.Add(new Order() { OrderID = 4, CustomerID = 1, Date = System.DateTime.Parse("2017-01-04"), TotalAmount = 400 }); 
      _AllOrders.Add(new Order() { OrderID = 5, CustomerID = 2, Date = System.DateTime.Parse("2017-01-05"), TotalAmount = 500 }); 
      _AllOrders.Add(new Order() { OrderID = 6, CustomerID = 2, Date = System.DateTime.Parse("2017-01-06"), TotalAmount = 600 }); 
      _AllOrders.Add(new Order() { OrderID = 7, CustomerID = 3, Date = System.DateTime.Parse("2017-01-07"), TotalAmount = 700 }); 
      _AllOrders.Add(new Order() { OrderID = 8, CustomerID = 3, Date = System.DateTime.Parse("2017-01-08"), TotalAmount = 800 }); 
      _AllOrders.Add(new Order() { OrderID = 9, CustomerID = 3, Date = System.DateTime.Parse("2017-01-09"), TotalAmount = 900 }); 
      _AllOrders.Add(new Order() { OrderID = 10, CustomerID = 3, Date = System.DateTime.Parse("2017-01-10"), TotalAmount = 1000 }); 
      _AllOrders.Add(new Order() { OrderID = 11, CustomerID = 3, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1200 }); 
      _AllOrders.Add(new Order() { OrderID = 12, CustomerID = 3, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1400 }); 
      _AllOrders.Add(new Order() { OrderID = 13, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 1200 }); 
      _AllOrders.Add(new Order() { OrderID = 14, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5450 }); 
      _AllOrders.Add(new Order() { OrderID = 15, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5020 }); 
      _AllOrders.Add(new Order() { OrderID = 16, CustomerID = 4, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5020 }); 
      _AllOrders.Add(new Order() { OrderID = 17, CustomerID = 5, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5030 }); 
      _AllOrders.Add(new Order() { OrderID = 18, CustomerID = 5, Date = System.DateTime.Parse("2017-01-01"), TotalAmount = 5050 }); 
     } 

     public void ApplyFilter() 
     { 
      if (SelectedCustomer != null) 
      { 
       var linqresults = _AllOrders.Where(o => o.CustomerID == SelectedCustomer.CustomerID); 
       _CustomerOrders = new ObservableCollection<Order>(linqresults); 
      } 
      else 
      { 
       _CustomerOrders = null; 
      } 
     } 
     public ObservableCollection<Order> Orders 
     { 
      get { 
       if (SelectedCustomer != null) 
        return _CustomerOrders; 
       else 
        return _AllOrders; 
      } 
      set { 
       _AllOrders = value; 
       OnPropertyChanged("Orders"); 
      } 
     } 

     protected void OnPropertyChanged(string name) 
     { 
      PropertyChangedEventHandler handler = PropertyChanged; 
      if (handler != null) 
       handler(this, new PropertyChangedEventArgs(name)); 
     } 
    } 
}