绑定到 COM 对象 - 无法解析属性 [英] Binding to a COM Object - Cannot resolve a Property

问题描述

我目前在将对象绑定到 WPF 列表框时遇到了一些麻烦.元素数量已正确填充，但无法访问 Name 属性.我收到以下错误消息:

I am currently running into some trouble with binding objects to a WPF ListBox. The number of Elements is populated correctly but the Name property cannot be accessed. I get the following error message:

System.Windows.Data 错误:40:BindingExpression 路径错误:在object"__ComObject"(HashCode=17252513)上找不到Name"属性.绑定表达式:路径=名称；数据项='__ComObject'(哈希码=17252513)；目标元素是 'TextBlock' (Name='');目标属性是文本"(类型字符串")

但是，我可以在运行时将此属性正确打印到控制台.

However, I am able to print this property correctly to the console at runtime.

看起来对象没有正确投射

It looks like the object is not casted correctly

XAML:

<ListBox Name="lbSelectConfiguration" Margin="10" ItemsSource="{Binding Configurations}">
  <ListBox.ItemTemplate>
      <StackPanel Margin="5" Orientation="Horizontal">
        <Image Source="/Resources/Configuration.png" Margin="0,0,8,0" />
        <TextBlock Text="{Binding Name}" />
      </StackPanel>
    </DataTemplate>
  </ListBox.ItemTemplate>
</ListBox>

背后的代码

  this.DataContext = viewModel;
  this.viewModel = viewModel;
  foreach (Configuration config in this.viewModel.Configurations)
  {
      Console.WriteLine(config.Name);
  }

你能帮我吗?谢谢.

推荐答案

据我所知，ComObjects 在 .NET 中是 dynamic，所以编译器永远不会在编译时识别对象属性的名称.如果这对您来说真的很重要，那么只需创建一个实现 INotifyPropertyChanged 接口的 .NET 包装器对象并将该对象的所有属性复制到您的 WPF 对象.显然，编译器将能够读取属性的名称.

As far as I can remember, ComObjects are dynamic in .NET, so the compiler will never recognise the names of the object's properties at compile time. If that's really important for you, then just create a .NET wrapper object that implements the INotifyPropertyChanged interface and copy all of the object's properties to your WPF object. The compiler will then obviously be able to read the names of the properties.

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