（WPF）如何在ItemsControl中的項目之間添加分隔符 - Bug修復

Question

我在此站點上找到了解決方案（如何在項目控件中的項目之間輸入分隔符（click）並發現bug =（（（（ ）它？

，當我試圖調整ItemsControl的（我已經設置屬性「Horizo​​ntalScrollBarVisibility」爲「Disable」）任何想法，我應該如何修復這個bug

Answer 1

這是不容易這hapens ，但我意識到我應該怎麼做才能解決這個問題。我的想法是使用自定義轉換器，但我沒有任何解決方法r的想法如何將ConverterParameter發送到轉換器。但我找到了解決辦法。 這裏是我的轉換器：

public class SeparatorConverter : IValueConverter 
{ 
    private Visibility _visible; 
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     var element = (TextBlock) value; 
     element.Loaded += ElementLoaded; 
     return _visible; 
    } 

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     return null; //not needed 
    } 
    private static void ElementLoaded(object sender, RoutedEventArgs e) 
    { 
     var element = sender as TextBlock; 
     var parentItemsControl = element.FindParent(x => x is ItemsControl) as ItemsControl; 
     var parentPanel = element.FindParent(x => x is Panel) as Panel; 

     if (parentItemsControl == null || element == null || parentPanel== null) 
      return; 

     var itemText = parentPanel.FindName("MyTextBlock") as TextBlock; 
     var collection = parentItemsControl.ItemsSource as IEnumerable<string>; 

     if (itemText == null || collection == null) 
      return; 

     var list = collection.ToList(); 
     if (list.IndexOf(itemText.Text) == list.Count() - 1) // Can be incorrect because we can have two same items 
      element.Visibility = Visibility.Collapsed; 
    } 
} 

查找父功能：

public static DependencyObject FindParent(this DependencyObject element, Func<DependencyObject, bool> filter) 
    { 
     DependencyObject parent = VisualTreeHelper.GetParent(element); 

     if (parent != null) 
     { 
      if (filter(parent)) 
      { 
       return parent; 
      } 

      return FindParent(parent, filter); 
     } 

     return null; 
    } 

這裏是我的XAML代碼：

<Coverters:SeparatorConverter x:Key="SeparatorVisibilityConverter"> 
    </Coverters:SeparatorConverter> 
    <ItemsControl Grid.Row="1" ItemsSource="{Binding Value, IsAsync=False}"> 
    <ItemsControl.ItemsPanel> 
     <ItemsPanelTemplate> 
      <WrapPanel> 
      </WrapPanel> 
     </ItemsPanelTemplate> 
    </ItemsControl.ItemsPanel> 
    <ItemsControl.ItemTemplate> 
     <DataTemplate> 
      <WrapPanel> 
       <TextBlock x:Name="MyTextBlock" Text="{Binding}" Style="{StaticResource TextBlockInListViewItem}" TextWrapping="WrapWithOverflow"/> 
       <TextBlock x:Name="commaTextBlock" Style="{StaticResource TextBlockInListViewItem}" Text=", " Visibility="{Binding RelativeSource={RelativeSource Self}, 
          Converter={StaticResource SeparatorVisibilityConverter}}"/> 
      </WrapPanel> 
     </DataTemplate> 
    </ItemsControl.ItemTemplate> 
</ItemsControl> 

確定。任何方式，如果你有另一個想法如何解決這個錯誤，你可以在這裏發表你的答案=）