c# - RX : ComboBox empty if bind to list | ViewModelViewHost could not find a valid view for the view model

Question

在ViewModel是一个

public List<string> OperationModes { get; } = Enum.GetNames(typeof(EOperationMode)).ToList();

我想绑定(bind)到 ComboBox .

reactiveUI 方式 |不工作

this.OneWayBind(ViewModel, model => model.OperationModes, window => window.ComboBoxOperationMode.ItemsSource).DisposeWith(r);

如果使用 reactiveUI绑定(bind) list到 ComboBox ，我在 console output 中收到以下错误.

控制台输出

DefaultViewLocator: Failed to resolve view for view model type 'System.Object'.
DefaultViewLocator: Failed to resolve view for view model type 'System.Object'.
ViewModelViewHost: The ViewModelViewHost could not find a valid view for the view model of type System.String and value Passthrough.

xaml 方式 |工作

<ComboBox
    x:Name="ComboBoxOperationMode"
    ItemsSource="{Binding ViewModel.OperationModes}"/>

我该如何解决这个问题？或者无法绑定(bind) list<string>通过reactiveUI ？

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Github 问题:https://github.com/reactiveui/ReactiveUI/issues/2008

Answer 1

设置DisplayMemberPath ComboBox 的属性(property)避免使用 ViewModelViewHost试图解析 string 的 View :

<ComboBox x:Name="ComboBoxOperationMode" DisplayMemberPath="." />