我有一个抽象基类aComponent和子类CriteriaList，Question等。
对于每个子类，我有两个对应的UserControl，其名称类似于ueCriteriaList，ubCriteriaList，ueQuestion，ubQuestion等。（{ {1}}代表“ue带输入元素”，UserControl代表“ub带按钮”。）
UserControl是“ControllerClass”，其中包含DataContext的属性作为实际my_aComponent实例的getter。当aComponent实例更改时（例如更改为aComponent的实例），我想加载相应的UserControls（在本例中为ueCriteriaList和ubCriteriaList）。
我有两个转换器CriteriaList和ueControlConverter，它们取类名（例如ubControlConverter）并返回CriteriaList个实例（在这种情况下，UserControl ）。
ueCriteriaList在XAML中，我有两个Public Class ueControlConverter
Implements IValueConverter
Public Function Convert(value As Object, targetType As Type, parameter As Object,
culture As System.Globalization.CultureInfo) As Object
Implements IValueConverter.Convert
Dim aComp As aComponent = value
Dim assemblyKlassenname As String = aComp.GetType.ToString
Dim assemblyName As String = Left(assemblyKlassenname,
assemblyKlassenname.IndexOf(".") + 1)
Dim klassenName As String = Right(assemblyKlassenname,
assemblyKlassenname.IndexOf(".") - 1)
Dim t As Type = Type.GetType(assemblyName & "ue" & klassenName)
Dim o As UserControl = Activator.CreateInstance(t)
o.DataContext = value
Return o
End Function
Public Function ConvertBack(value As Object, targetType As Type, parameter As Object,
culture As System.Globalization.CultureInfo) As Object
Implements IValueConverter.ConvertBack
Return value
End Function
End Class
绑定ContentControl和Content="{Binding Path=my_aComponent, Converter={StaticResource _ueControlConverter}。显示了正确的Content="{Binding Path=my_aComponent, Converter={StaticResource _ubControlConverter}，但没有绑定到UserControl。
我该怎么办？
答案 0 :(得分：0)
您还需要通过绑定 ContentControl 对象来提供 DataContext 属性。