Question

我有以下课程 -

public class A : INotifyPropertyChanged
{
    public string Name { get; set; }
    public ObservableCollection<Child> Children { get; set; }

    ...
}

public class Child : INotifyPropertyChanged
{
    public string InstanceName { get; set; }

    ...
}

这是我的TreeView XAML -

<TreeView ItemsSource="{Binding ListOfClassA}">
    <TreeView.ItemTemplate>
        <HierarchicalDataTemplate ItemsSource="{Binding Path=Children}">
            <TextBlock Text="{Binding Path=InstanceName}"/>
        </HierarchicalDataTemplate>
    </TreeView.ItemTemplate>
</TreeView>

在这种情况下，不显示父类A名称。如何在Name课上显示A属性以及InstanceName类的Child属性。

Answer 1

在您的代码中

<HierarchicalDataTemplate ItemsSource="{Binding Path=Children}">
    <TextBlock Text="{Binding Path=InstanceName}"/>
</HierarchicalDataTemplate>

实际上是A类的模板。它应该是：

<HierarchicalDataTemplate ItemsSource="{Binding Path=Children}">
    <HierarchicalDataTemplate.ItemTemplate>
        <HierarchicalDataTemplate>
            <!-- this is how Child is visualised-->
            <TextBlock Text="{Binding Path=InstanceName}"/>
        </HierarchicalDataTemplate>
    </HierarchicalDataTemplate.ItemTemplate>
    <!-- this is how A is visualised-->
    <TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>

为了获得更好的代码可见性，您可以将它们作为两个单独的模板在资源部分中编写：

<HierarchicalDataTemplate x:Key="Child_template">
     <!-- this is how Child is visualised-->
     <TextBlock Text="{Binding Path=InstanceName}"/>
</HierarchicalDataTemplate>

<HierarchicalDataTemplate x:Key="A_template" ItemsSource="{Binding Path=Children}"
    ItemTemplate="{StaticResource Child_template}">
    <!-- this is how A is visualised-->
    <TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>

希望这会有所帮助。供参考：http://msdn.microsoft.com/en-us/library/dd759035(v=vs.95).aspx

WPF TreeView父节点绑定

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