c# - 绑定(bind) WindowsFormsHost 子属性

Question

我正在创建一个 MVVM 应用程序。

在我的模型中，我需要句柄 System.Windows.Forms.Panel 显示在View。我的想法是在 ViewModel 中创建这个面板，然后从一侧 - 将 View 绑定(bind)到它，在另一侧，传递它模型句柄。

我有一个 WindowsFormsHost 控件:

<Page x:Class="Test.Views.RenderPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:WinForms="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
      xmlns:local="clr-namespace:Test.Views"
      mc:Ignorable="d" 
      d:DesignHeight="800" d:DesignWidth="1200"
      Title="Page1">

    <DockPanel>
        <WindowsFormsHost x:Name="winformsHost" Child="{Binding RenderPanel}"/>
    </DockPanel>
</Page>

我想将它的 Child 属性与我的 ViewModel 提供的 RenderPanel 绑定(bind)

public ObservableObject<System.Windows.Forms.Panel> RenderPanel { get; private set; }

public VideoRecorderViewModel ()
{
    RenderPanel = new System.Windows.Forms.Panel (); //Bind it here
    var model = new Model (RenderPanel.Handle); pass it to the model
}

但是，我收到一条错误消息:

System.Windows.Markup.XamlParseException: 
A 'Binding' cannot be set on the 'Child' property of type 'WindowsFormsHost'. 
A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

如何解决这个问题？

Answer 1

错误是不言自明的。您不能绑定(bind)到属于 WPF WindowsFormsHost 控件的子对象的属性

您可以创建一个带有一些附加属性的类来实现此目的: Workaround for inability to bind to a property that belongs to a WindowsFormsHost Child object in C#/XAML app?

或者您可以像这里一样使用 ContentControl 包装它:Created Bindable WindowsFormsHost, but child update is not being reflected to control