DataGrid 비헤이비어에서 ItemsControl을 바인딩하는 방법

Question

UserControl.Resources에 정의 된이 사용자 지정 세로 스크롤 막대가 있는데, ItemsControl에 'ItemsSelected'라는 항목이 있습니다.

내가 할 일은 DataGridSelectionChanged 동작의 DependencyProperty ItemsControlObject에 바인딩하는 것입니다. 예제 바인딩은 작동하지 않지만 내가 성취하고자하는 것을 보여줍니다. ItemsSelected를 바인딩하기 위해 누락 된 항목은 무엇입니까?

System.Windows.Data 오류 : 4 : 'ElementName = ItemsSelected'참조로 바인딩 소스를 찾을 수 없습니다. BindingExpression : (경로 없음); DataItem = null; 대상 요소는 'DataGridSelectionChanged'(HashCode = 43407976)입니다. target 속성이 같은 것을 구현

<UserControl> 
    <UserControl.Resources> 
     <ControlTemplate x:Key="VerticalScrollBar" TargetType="{x:Type ScrollBar}"> 
      <Grid> 
       ... 
       <!-- BEGIN --> 
       <ItemsControl Name="ItemsSelected" VerticalAlignment="Stretch" 
           ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}, Path=DataContext.MarkerCollection}"> 
        <ItemsControl.ItemTemplate> 
         <DataTemplate> 
          <Rectangle Fill="Gray" Width="18" Height="4"/> 
         </DataTemplate> 
        </ItemsControl.ItemTemplate> 
        <ItemsControl.ItemContainerStyle> 
         <Style TargetType="ContentPresenter"> 
          <Setter Property="Canvas.Top" Value="{Binding}" /> 
         </Style> 
        </ItemsControl.ItemContainerStyle> 
        <ItemsControl.ItemsPanel> 
         <ItemsPanelTemplate> 
          <Canvas/> 
         </ItemsPanelTemplate> 
        </ItemsControl.ItemsPanel> 
       </ItemsControl> 
       <!-- END --> 
      </Grid> 
     </ControlTemplate> 

     <Style TargetType="{x:Type DataGrid}" > 
      <Style.Resources> 
       <Style x:Key="{x:Type ScrollBar}" TargetType="{x:Type ScrollBar}"> 
        <Setter Property="SnapsToDevicePixels" Value="True" /> 
        <Setter Property="OverridesDefaultStyle" Value="true" /> 
        <Style.Triggers> 
         <Trigger Property="Orientation" Value="Horizontal"> 
          <Setter Property="Width" Value="Auto" /> 
          <Setter Property="Height" Value="18" /> 
          <Setter Property="Template" Value="{StaticResource HorizontalScrollBar}" /> 
         </Trigger> 
         <Trigger Property="Orientation" Value="Vertical"> 
          <Setter Property="Width" Value="18" /> 
          <Setter Property="Height" Value="Auto" /> 
          <Setter Property="Template" Value="{StaticResource VerticalScrollBar}" /> 
         </Trigger> 
        </Style.Triggers> 
       </Style> 
      </Style.Resources> 
     </Style> 
    </UserControl.Resources> 

    <Grid Name="gridUsers" Background="Transparent"> 
     <DockPanel> 
      <DataGrid Name="GenericDataGrid"> 
       <i:Interaction.Behaviors> 
        <helpers:DataGridSelectionChanged ItemsControlObject="{Binding ElementName=ItemsSelected}" /> 
       </i:Interaction.Behaviors> 
       <DataGrid.Columns> 
        ... 
       </DataGrid.Columns> 
      </DataGrid> 
     </DockPanel> 
    </Grid> 
</UserControl> 

[EDIT]

public static class ScrollBarMarkers 
{ 
    public static readonly DependencyProperty MarkersSelectedCollectionProperty = 
     DependencyProperty.RegisterAttached("MarkersSelectedCollection", typeof(ObservableCollection<double>), typeof(ScrollBarMarkers), new PropertyMetadata(null)); 

    public static ObservableCollection<double> GetMarkersSelectedCollection(DependencyObject obj) 
    { 
     return (ObservableCollection<double>)obj.GetValue(MarkersSelectedCollectionProperty); 
    } 

    public static void SetMarkersSelectedCollection(ItemsControl obj, ObservableCollection<double> value) 
    { 
     obj.SetValue(MarkersSelectedCollectionProperty, value); 
    } 
} 

Answer 1

바인딩되는 실제의 ItemsControl 여기

결합 필요성을 정지 (입력 'ItemsControl에') 'ItemsControlObject'인 :

<ItemsControl ItemsSource="{Binding Source={x:Static helpers:MyClass.Instance}, Path=SelectedMarkers}"> 

여기에 싱글 톤 패턴이있는 클래스가 있습니다.

public class MyClass : INotifyPropertyChanged 
{ 
    public static ObservableCollection<double> m_selectedMarkers = new ObservableCollection<double>(); 
    public ObservableCollection<double> SelectedMarkers 
    { 
     get 
     { 
      return m_selectedMarkers; 
     } 
     set 
     { 
      m_selectedMarkers = value; 
      NotifyPropertyChanged(); 
     } 
    } 


    private static MyClass m_Instance; 
    public static MyClass Instance 
    { 
     get 
     { 
      if (m_Instance == null) 
      { 
       m_Instance = new MyClass(); 
      } 

      return m_Instance; 
     } 
    } 

    private MyClass() 
    { 
    } 

    #region INotifyPropertyChanged Members 

    public event PropertyChangedEventHandler PropertyChanged; 

    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "") 
    { 
     if (PropertyChanged != null) 
     { 
      PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
     } 
    } 

    #endregion 
}