MVVM light listview selecteditem

Question

如何從mvvm light wpf的listview中獲取selecteditem？

我有一個集合，並創建了一個選定的項目屬性，但我無法獲得所選項目的綁定權限。

這是我的視圖模型：

 ObservableCollection<DTO.Dossier.Dossier> _dossiers; 
    public ObservableCollection<DTO.Dossier.Dossier> Dossiers 
    { 
     get { return _dossiers; } 
     set 
     { 
      _dossiers = value; 
      RaisePropertyChanged("Dossiers"); 
     } 
    } 

     private DTO.Dossier.Dossier _selectedDossier; 
    public DTO.Dossier.Dossier SelectedDossier 
    { 
     get { return _selectedDossier; } 
     set 
     { 
      if (_selectedDossier != value) 
       _selectedDossier = value; 

      RaisePropertyChanged("SelectedDossier"); 

     } 
    } 

這是爲ListView的XAML：

   <ListView ItemsSource="{Binding Dossiers}" Margin="0,5,0,0" Name="LstDossiers" SelectedItem="{Binding SelectedDossier, Mode=OneWay}"> 
       <i:Interaction.Triggers> 
        <i:EventTrigger EventName="SelectionChanged"> 
         <cmd:EventToCommand Command="{Binding SelectDossierCommand}" 
           CommandParameter="{Binding SelectedDossier, 
             ElementName=LstDossiers}" /> 
        </i:EventTrigger> 
       </i:Interaction.Triggers> 
       <ListView.View> 
        <GridView> 
         <GridViewColumn Header="Id" 
     DisplayMemberBinding="{Binding Id}" /> 
         <GridViewColumn Header="Omschrijving" 
     DisplayMemberBinding="{Binding Omschrijving}" /> 
        </GridView> 
       </ListView.View> 
      </ListView> 

該命令工作，但到SelectedDossier綁定是不是。

Answer 1

你必須使用模式雙向您綁定：

<ListView ItemsSource="{Binding Dossiers}" Margin="0,5,0,0" Name="LstDossiers" SelectedItem="{Binding SelectedDossier, Mode=TwoWay}">