Silverlight中文本框的可編輯列表框

我的目標是能夠添加/編輯/刪除項目到列表框。我以下面的方式創建了一個文本框列表框。我能夠顯示數據，但我無法編輯數據。有人可以幫助我修改代碼，以便我可以實現此功能。Silverlight中文本框的可編輯列表框

<ListBox Name="lbDemoBox" ItemsSource="{Binding testList}" Grid.Column="0" Grid.Row="0" SelectionChanged="lbDemoBox_SelectionChanged"> 
     <ListBox.ItemTemplate> 
      <DataTemplate> 
       <StackPanel Orientation="Vertical"> 
        <TextBox Text="{Binding Path=.}" KeyDown="TextBox_KeyDown" KeyUp="TextBox_KeyUp" GotFocus="TextBox_GotFocus"/> 
       </StackPanel> 
      </DataTemplate> 
     </ListBox.ItemTemplate> 
    </ListBox>

這裏是背後

public partial class MainPage : UserControl 
{ 
    private string focusedString { get; set; } 

    public MainPage() 
    { 
     InitializeComponent(); 
    } 

    private void Window_Loaded(object sender, RoutedEventArgs e) 
    { 
     LayoutRoot.DataContext = new ViewModel(); 
    } 

    private void TextBox_KeyDown(object sender, KeyEventArgs e) 
    { 
     if (e.Key == Key.Enter && (Keyboard.Modifiers & (ModifierKeys.Shift)) == ModifierKeys.Shift) 
     { 
      (lbDemoBox.ItemsSource as ObservableCollection<string>).Add(string.Empty); 
     } 



    } 

    private void TextBox_KeyUp(object sender, KeyEventArgs e) 
    { 

     if (e.Key == Key.Delete) 
     { 
      int index = (lbDemoBox.ItemsSource as ObservableCollection<string>).IndexOf(focusedString); 

      (lbDemoBox.ItemsSource as ObservableCollection<string>).RemoveAt(index); 

     } 
    } 

    private void TextBox_GotFocus(object sender, RoutedEventArgs e) 
    { 
     focusedString = (sender as TextBox).Text; 
    } 

    private void lbDemoBox_SelectionChanged(object sender, SelectionChangedEventArgs e) 
    { 

    } 

} 

public class ViewModel 
{ 
    public ObservableCollection<string> testList 
    { 
     get { return new ObservableCollection<string> { "Item1", "Item2", "Item3" }; } 
    } 
}

來源

2012-11-13 csprabala

你是什麼意思編輯數據，您需要雙向綁定？ –

是的，我想要雙向綁定，當我設置Mode = TwoWay時，我得到一個異常「值不在預期範圍內」 – csprabala

代碼試試這個：

<TextBox Text="{Binding Path=YourProperty, Mode=TwoWay}" />

來源

2012-11-14 10:03:43

Dimitry，Path =。因爲我綁定到列表和我設置mode = twoway的時刻，我得到一個「值不在預期範圍內」異常 – csprabala

Silverlight中文本框的可編輯列表框

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