我试图在 WPF 中显示一个简单的树结构,它正在工作,但它在树的顶层显示所有级别的节点。我在结构中总共有 9 个节点,但只有一个应该显示在根级别。在那下面应该是两个节点,在那些节点下面,等等。在每个节点下,它确实显示了正确的子节点,但此外它还在顶部显示了所有节点。这是我的对象(如果重要,这些是 EF db 对象):
public class ProductGroup
{
public int ProductGroupId { get; set; }
public ProductGroup Parent { get; set; }
public string Description { get; set; }
private ProductGroup() //not used, but needed to prevent EF error
{
Description = string.Empty;
}
public ProductGroup(string description)
{
Description = description;
}
public virtual ICollection<ProductGroup> Children { get; set; }
public void Add(ProductGroup newItem)
{
newItem.Parent = this;
if (Children == null)
Children = new Collection<ProductGroup>();
Children.Add(newItem);
}
public int Count
{
get { return Children.Count; }
}
}
这是xaml:
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ConfiguratorDB="clr-namespace:ConfiguratorDB;assembly=ConfiguratorDB" mc:Ignorable="d" x:Class="ConfiguratorDBTest.Window2"
xmlns:local="clr-namespace:ConfiguratorDB;assembly=ConfiguratorDB"
Title="Window2" Height="417" Width="712" Loaded="Window_Loaded_1">
<Window.Resources>
<CollectionViewSource x:Key="productGroupViewSource" d:DesignSource="{d:DesignInstance {x:Type ConfiguratorDB:ProductGroup}, CreateList=True}"/>
</Window.Resources>
<Grid DataContext="{StaticResource productGroupViewSource}">
<DataGrid x:Name="productGroupDataGrid" AutoGenerateColumns="False" EnableRowVirtualization="True" ItemsSource="{Binding}" Margin="23,36,346,151" RowDetailsVisibilityMode="VisibleWhenSelected">
<DataGrid.Columns>
<DataGridTextColumn x:Name="descriptionColumn" Binding="{Binding Description}" Header="Description" Width="SizeToHeader"/>
<DataGridTextColumn x:Name="productGroupIdColumn" Binding="{Binding ProductGroupId}" Header="Product Group Id" Width="SizeToHeader"/>
</DataGrid.Columns>
</DataGrid>
<TreeView x:Name="productGroupTreeView" ItemsSource="{Binding}" Margin="396,38,73,111">
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type local:ProductGroup}" ItemsSource="{Binding Children}">
<TextBlock Text="{Binding Path=Description}" />
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
</Grid>
这是输出的样子。不应显示任何重复项: