如何在ComboBox中将'Attached property'定义为'SelectedValuePath'？

嗨，我在ComboBox中绑定有问题 . 我想将ComboBox项绑定到ListView列，并作为选定值返回选定列上定义的附加属性的值 .

在下面的示例中，您可以看到显示所选列宽度的工作示例 . 如果您尝试将ComboBox中的 SelectedValuePath 更改为 (loc:SampleBehavior.SampleValue) ，则会出现绑定错误：

BindingExpression路径错误：'object'''GridViewColumn'上找不到'(u:SearchableListView.SearchMemberPath)'属性

<Window x:Class="Problem_Sample1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:loc="clr-namespace:Problem_Sample1"
  WindowStartupLocation="CenterScreen"
  Title="Window1" 
  Height="300" Width="300">
  <DockPanel>
    <ComboBox DockPanel.Dock="Top"
         x:Name="combobox"
         ItemsSource="{Binding Path=View.Columns, ElementName=listview}"
         DisplayMemberPath="Header"
         SelectedValuePath="Width">
    </ComboBox>

    <StatusBar DockPanel.Dock="Bottom">
      <TextBlock>
        <TextBlock Text="Selected column (value): " />
        <TextBlock Text="{Binding Path=SelectedValue, ElementName=combobox}" />
      </TextBlock>
    </StatusBar>

    <ListView x:Name="listview">
      <ListView.View>
        <GridView>
          <GridViewColumn Header="Name" 
                  Width="101" 
                  loc:SampleBehavior.SampleValue="201" />
          <GridViewColumn Header="Surname" 
                  Width="102" 
                  loc:SampleBehavior.SampleValue="202" />
        </GridView>
      </ListView.View>
    </ListView>
  </DockPanel>
</Window>

SampleBehavior.cs

using System.Windows;
using System.Windows.Controls;

namespace Problem_Sample1
{
  public static class SampleBehavior
  {

    public static readonly DependencyProperty SampleValueProperty =
      DependencyProperty.RegisterAttached(
        "SampleValue",
        typeof (int),
        typeof (SampleBehavior));

    [AttachedPropertyBrowsableForType(typeof(GridViewColumn))]
    public static int GetSampleValue(GridViewColumn column)
    {
      return (int)column.GetValue(SampleValueProperty);
    }

    [AttachedPropertyBrowsableForType(typeof(GridViewColumn))]
    public static void SetSampleValue(GridViewColumn column, int value)
    {
      column.SetValue(SampleValueProperty, value);
    }

  }
}

感谢您的任何帮助或建议 .