我试图绑定到DataGrid中的StringValue对象集合，但每个项都显示在单独的行中。我希望使用分栏显示，其中565477和65656等值显示在同一行中。以下是我当前的代码：

XAML文件：

<TreeView>
    <TreeViewItem Header="Warnings">
        <TreeView ItemsSource="{Binding WarningCategories}">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Path=Warnings}">
                    <TextBlock Text="{Binding Path=Category}" />
                    <HierarchicalDataTemplate.ItemTemplate>
                        <DataTemplate>
                            <DataGrid ItemsSource="{Binding Fields}" AutoGenerateColumns="True" HeadersVisibility="None">
                            </DataGrid>                                
                        </DataTemplate>
                    </HierarchicalDataTemplate.ItemTemplate>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
    </TreeViewItem>
</TreeView>

程式码后置：

public class ViewModel : INotifyPropertyChanged
   {
      public event PropertyChangedEventHandler PropertyChanged;

      public ObservableCollection<WarningCategory> WarningCategories { get; set; }

      public ViewModel()
      {
         WarningCategories = new ObservableCollection<WarningCategory>();

         ObservableCollection<Warning> warnings = new ObservableCollection<Warning>
         {
            new Warning( new StringValue("565477"), new StringValue("65656")),
            new Warning( new StringValue("767455"), new StringValue("75642")),
         };

         WarningCategories.Add(new WarningCategory("Warning One", warnings));


         warnings = new ObservableCollection<Warning>
         {
            new Warning( new StringValue("565477"), new StringValue("65656")),
            new Warning( new StringValue("767455"), new StringValue("75642")),
         };


         WarningCategories.Add(new WarningCategory("Warning Two", warnings));
      }


      [NotifyPropertyChangedInvocator]
      protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
      {
         var handler = PropertyChanged;
         if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName));
      }
   }

   public class WarningCategory
   {
      public string Category { get; set; }

      private ObservableCollection<Warning> m_warnings;

      public ObservableCollection<Warning> Warnings

      {
         get
         {
            return m_warnings ?? (m_warnings = new ObservableCollection<Warning>());
         }
      }

      public WarningCategory(string category, ObservableCollection<Warning> animals)

      {
         Category = category;

         m_warnings = animals;
      }
   }

   public class Warning

   {
      public ObservableCollection<StringValue> Fields { get; set; }

      public Warning(params StringValue[] fields)

      {
         Fields = new ObservableCollection<StringValue>(fields);
      }
   }

   public class StringValue
   {
      public StringValue(string s)
      {
         Value = s;
      }
      public string Value { get; set; }
   }

我想达到的结果是这样的：

我有一个解决方法，但它不支持多重选择。下面是此解决方法的代码：

<ItemsControl ItemsSource="{Binding Fields}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal"/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Value}" Width="150"/>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

如何使用DataGrid实现所需的柱形显示并保持对多选的支持？