C# WPF绑定混乱：复合DependencyObject

我有一个DependencyObject类组合，如下所示：

public class A : DependencyObject {
    public AB AB { get { ... } set { ... } }
    public AB AC { get { ... } set { ... } }
}

public class AB : DependencyObject {
    public string Property1 { get { ... } set { ... } }
    public string Property2 { get { ... } set { ... } }
    public string Property3 { get { ... } set { ... } }
}

public class AC : DependencyObject {
    public string Property1 { get { ... } set { ... } }
    public string Property2 { get { ... } set { ... } }
}

在A、AB和AC上，所有属性都按照通常的方式执行引用静态属性的典型GetValue和SetValue操作

现在，类A、AB和AC有相应的用户控件AGroupBox、ABGrid、ACGrid。AGroupBox具有根a类属性，ABGrid具有根AB类属性，ACGrid具有根AC类属性

ABGrid和ACGrid都有工作绑定（例如，ABGrid包含一个文本框控件，其文本属性双向绑定到AB的属性1）。我通过创建一个简单窗口并将ABGrid作为窗口的唯一内容子项以及在代码隐藏设置ABGrid.AB=new AB（）中验证了这一点；ACGrid.AC=new AC（）；，的情况相同

问题是当我试图用AGroupBox做类似的事情时。我尝试在XAML中将AGroupBox添加为窗口内容的单个子级，并将AGroupBox.A属性设置为new A（）{AB=new AB（），AC=new AC（）}；控件绑定失败。AB和AC的PropertyN属性具有默认值

对我遗漏的东西有什么见解吗？我该走另一条路吗

编辑：附加注释-如果我将字符串属性添加到a，（String1）并将其绑定到GroupBox的文本部分，则绑定到该属性有效，但不会绑定到a的AC和AB属性

编辑-2：根据David Hay的请求（所有代码都在命名空间wpfStackOverflow中）：

A.cs

public class A : DependencyObject {
    static public DependencyProperty BProperty { get; private set; }
    static public DependencyProperty CProperty { get; private set; }
    static public DependencyProperty PropertyProperty { get; private set; }

    static A() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(A));
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(A));
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(A));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public A() {
        Property = "A's Default Value";
        B = new B();
        C = new C();
    }
}

public class B : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static B() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(B));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public B() {
        Property = "B's Default Value";
    }
}

public class C : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static C() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(C));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public C() {
        Property = "C's Default Value";
    }
}

public partial class AGroupBox : UserControl {
    static public DependencyProperty AProperty { get; private set; }

    static AGroupBox() {
        AProperty = DependencyProperty.Register("A", typeof(A), typeof(AGroupBox));
    }

    public A A {
        get { return (A)GetValue(AProperty); }
        set { SetValue(AProperty, value); }
    }

    public AGroupBox() {
        InitializeComponent();
    }
}

public partial class BGrid : UserControl {
    static public DependencyProperty BProperty { get; private set; }

    static BGrid() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(BGrid));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public BGrid() {
        InitializeComponent();
    }
}

public partial class CGrid : UserControl {
    static public DependencyProperty CProperty { get; private set; }

    static CGrid() {
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(CGrid));
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public CGrid() {
        InitializeComponent();
    }
}

public partial class Window1 : Window {
    public Window1() {
        InitializeComponent();

        aGroupBox.A = new A()
        {
            Property = "A's Custom Property Value",
            B = new B()
            {
                Property = "B's Custom Property Value"
            },
            C = new C()
            {
                Property = "C's Custom Property Value"
            }
        };
    }
}

B.cs

public class A : DependencyObject {
    static public DependencyProperty BProperty { get; private set; }
    static public DependencyProperty CProperty { get; private set; }
    static public DependencyProperty PropertyProperty { get; private set; }

    static A() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(A));
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(A));
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(A));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public A() {
        Property = "A's Default Value";
        B = new B();
        C = new C();
    }
}

public class B : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static B() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(B));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public B() {
        Property = "B's Default Value";
    }
}

public class C : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static C() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(C));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public C() {
        Property = "C's Default Value";
    }
}

public partial class AGroupBox : UserControl {
    static public DependencyProperty AProperty { get; private set; }

    static AGroupBox() {
        AProperty = DependencyProperty.Register("A", typeof(A), typeof(AGroupBox));
    }

    public A A {
        get { return (A)GetValue(AProperty); }
        set { SetValue(AProperty, value); }
    }

    public AGroupBox() {
        InitializeComponent();
    }
}

public partial class BGrid : UserControl {
    static public DependencyProperty BProperty { get; private set; }

    static BGrid() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(BGrid));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public BGrid() {
        InitializeComponent();
    }
}

public partial class CGrid : UserControl {
    static public DependencyProperty CProperty { get; private set; }

    static CGrid() {
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(CGrid));
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public CGrid() {
        InitializeComponent();
    }
}

public partial class Window1 : Window {
    public Window1() {
        InitializeComponent();

        aGroupBox.A = new A()
        {
            Property = "A's Custom Property Value",
            B = new B()
            {
                Property = "B's Custom Property Value"
            },
            C = new C()
            {
                Property = "C's Custom Property Value"
            }
        };
    }
}

C.cs

public class A : DependencyObject {
    static public DependencyProperty BProperty { get; private set; }
    static public DependencyProperty CProperty { get; private set; }
    static public DependencyProperty PropertyProperty { get; private set; }

    static A() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(A));
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(A));
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(A));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public A() {
        Property = "A's Default Value";
        B = new B();
        C = new C();
    }
}

public class B : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static B() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(B));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public B() {
        Property = "B's Default Value";
    }
}

public class C : DependencyObject {
    static public DependencyProperty PropertyProperty { get; private set; }

    static C() {
        PropertyProperty = DependencyProperty.Register("Property", typeof(string), typeof(C));
    }

    public string Property {
        get { return (string)GetValue(PropertyProperty); }
        set { SetValue(PropertyProperty, value); }
    }

    public C() {
        Property = "C's Default Value";
    }
}

public partial class AGroupBox : UserControl {
    static public DependencyProperty AProperty { get; private set; }

    static AGroupBox() {
        AProperty = DependencyProperty.Register("A", typeof(A), typeof(AGroupBox));
    }

    public A A {
        get { return (A)GetValue(AProperty); }
        set { SetValue(AProperty, value); }
    }

    public AGroupBox() {
        InitializeComponent();
    }
}

public partial class BGrid : UserControl {
    static public DependencyProperty BProperty { get; private set; }

    static BGrid() {
        BProperty = DependencyProperty.Register("B", typeof(B), typeof(BGrid));
    }

    public B B {
        get { return (B)GetValue(BProperty); }
        set { SetValue(BProperty, value); }
    }

    public BGrid() {
        InitializeComponent();
    }
}

public partial class CGrid : UserControl {
    static public DependencyProperty CProperty { get; private set; }

    static CGrid() {
        CProperty = DependencyProperty.Register("C", typeof(C), typeof(CGrid));
    }

    public C C {
        get { return (C)GetValue(CProperty); }
        set { SetValue(CProperty, value); }
    }

    public CGrid() {
        InitializeComponent();
    }
}

public partial class Window1 : Window {
    public Window1() {
        InitializeComponent();

        aGroupBox.A = new A()
        {
            Property = "A's Custom Property Value",
            B = new B()
            {
                Property = "B's Custom Property Value"
            },
            C = new C()
            {
                Property = "C's Custom Property Value"
            }
        };
    }
}

AGroupBox.xaml

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.AGroupBox"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=A}"
    Width="300"
    Height="72"
    >
    <GroupBox Header="{Binding Property}">
        <StackPanel >
            <local:BGrid B="{Binding B}"/>
            <local:CGrid C="{Binding C}"/>
        </StackPanel>
    </GroupBox>
</UserControl>

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.BGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=B}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.CGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=C}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<Window 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.Window1"
    Width="400"
    Height="200"
>
    <local:AGroupBox x:Name="aGroupBox" />
</Window>

BGrid.xaml

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.AGroupBox"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=A}"
    Width="300"
    Height="72"
    >
    <GroupBox Header="{Binding Property}">
        <StackPanel >
            <local:BGrid B="{Binding B}"/>
            <local:CGrid C="{Binding C}"/>
        </StackPanel>
    </GroupBox>
</UserControl>

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.BGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=B}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.CGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=C}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<Window 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.Window1"
    Width="400"
    Height="200"
>
    <local:AGroupBox x:Name="aGroupBox" />
</Window>

CGrid.xaml

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.AGroupBox"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=A}"
    Width="300"
    Height="72"
    >
    <GroupBox Header="{Binding Property}">
        <StackPanel >
            <local:BGrid B="{Binding B}"/>
            <local:CGrid C="{Binding C}"/>
        </StackPanel>
    </GroupBox>
</UserControl>

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.BGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=B}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.CGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=C}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<Window 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.Window1"
    Width="400"
    Height="200"
>
    <local:AGroupBox x:Name="aGroupBox" />
</Window>

window1.xaml

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.AGroupBox"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=A}"
    Width="300"
    Height="72"
    >
    <GroupBox Header="{Binding Property}">
        <StackPanel >
            <local:BGrid B="{Binding B}"/>
            <local:CGrid C="{Binding C}"/>
        </StackPanel>
    </GroupBox>
</UserControl>

<UserControl
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.BGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=B}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<UserControl 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="wpfStackOverflow.CGrid"
    DataContext="{Binding RelativeSource={RelativeSource Self}, Path=C}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>

        <Label Grid.Column="0" Content="Property"/>
        <TextBox Grid.Column="1" Text="{Binding Property}"/>
    </Grid>
</UserControl>

<Window 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:wpfStackOverflow"
    x:Class="wpfStackOverflow.Window1"
    Width="400"
    Height="200"
>
    <local:AGroupBox x:Name="aGroupBox" />
</Window>

---

尝试将以下内容替换为AGroupBox.xaml

<local:BGrid B="{Binding Path=A.B, RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type local:AGroupBox}}}"/>
<local:CGrid C="{Binding Path=A.C, RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type local:AGroupBox}}}"/>

---

它没有正确解析这两行的datacontext，因此没有为B和C寻找正确的位置。

我们必须看到AGroupBox的XAML，特别是绑定声明，以便在这里提供帮助。我猜想您的绑定语句没有正确设置以访问适当的数据。另外，调试输出中绑定失败消息的读数是多少？谢谢您的帮助！我在VisualStudio的“输出”窗口中查看了调试输出，没有发现任何绑定警告，您是如何确定问题的？关于一个不那么冗长的解决方案有什么想法吗？这里有一个链接，链接到一篇关于绑定调试技术的好文章：我知道有一种更干净的方法可以做到这一点（类似于您最初的尝试），但我现在无法想象它。