如何從WPF/XAML ListView中讀取子項值？

Question

夠了 - 我花了一個小時搜索周圍，試圖找出如何從ListView中讀取ListViewSubItem值（如果這是XAML中的正確術語）。這裏有一個小的ListView：

<ListView x:Name="CreatableAccounts" ItemsSource="{Binding Processable}" Margin="10,0"> 
     <ListView.View> 
       <GridView> 
        <GridViewColumn Header="Site Name" DisplayMemberBinding="{Binding SiteName}"/> 
        <GridViewColumn Header="From Package" DisplayMemberBinding="{Binding FiCodeDLL.Name}"/> 
       </GridView> 
     </ListView.View> 
</ListView> 

，這裏是我的嘗試讀取這顯然是行不通的值：

private void CreateAccounts_Click(object sender, RoutedEventArgs e) 
    { 
     ListViewItem selected = CreatableAccounts.SelectedItem; 
     selected.Ite // no Items, Text or similar property 


    } 

任何人都可以點我在正確的方向？ Grazie提前爲您提供幫助！

Answer 1

ListView控件具有可以綁定您的收藏子項目的實例的依賴屬性「的SelectedItem」，即：

<DockPanel> 
    <Button DockPanel.Dock="Top" Click="Button_Click">Selected Item</Button> 
    <ListView ItemsSource="{Binding AllItems}" SelectedItem="{Binding SelectedItem}"> 
     <ListView.View> 
      <GridView> 
       <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" /> 
       <GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}" /> 
      </GridView> 
     </ListView.View> 
    </ListView> 
</DockPanel> 

現在，您可以創建一個公開寫滿了你的項目一個ObservableCollection一個視圖模型，而這是你的SelectedItem項目的單個實例...

類似：

public partial class Window1 : Window 
{ 
    public Window1() 
    { 
     InitializeComponent(); 

     WindowViewModel vm = new WindowViewModel(); 
     this.DataContext = vm; 
    } 

    private void Button_Click(object sender, RoutedEventArgs e) 
    { 
     WindowViewModel vm = this.DataContext as WindowViewModel; 
     MessageBox.Show(vm.SelectedItem.Name); 
    } 

} 

public class WindowViewModel 
{ 
    public WindowViewModel() 
    { 
     AllItems = new ObservableCollection<Person>(); 
     AllItems.Add(new Person { Name = "Joe", Age = 26 }); 
     AllItems.Add(new Person { Name = "Mary", Age = 23 }); 
     AllItems.Add(new Person { Name = "Bill", Age = 32 }); 
     AllItems.Add(new Person { Name = "Harry", Age = 36 }); 
     AllItems.Add(new Person { Name = "Julie", Age = 18 }); 
     AllItems.Add(new Person { Name = "Claire", Age = 42 }); 
    } 

    public ObservableCollection<Person> AllItems { get; set; } 

    private Person _selectedItem; 
    public Person SelectedItem 
    { 
     get { return _selectedItem; } 
     set { _selectedItem = value; } 
    } 
} 

public class Person : INotifyPropertyChanged 
{ 

    private string _name; 
    private int _age; 

    public string Name 
    { 
     get { return _name; } 
     set 
     { 
      if (_name != value) 
      { 
       _name = value; 
       RaisePropertyChanged("Name"); 
      } 
     } 
    } 

    public int Age 
    { 
     get { return _age; } 
     set 
     { 
      if (_age != value) 
      { 
       _age = value; 
       RaisePropertyChanged("Age"); 
      } 
     } 
    } 

    #region INotifyPropertyChanged Members 

    public event PropertyChangedEventHandler PropertyChanged; 

    private void RaisePropertyChanged(string propertyName) 
    { 
     if (this.PropertyChanged != null) 
      this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
    } 

    #endregion 
} 

希望這有助於:)

伊恩