从视图MVVM WPF在视图模型中定义的访问枚举类型 [英] Access enumeration type defined in view model from the view MVVM WPF

问题描述

在我的MVVM WPF应用程序中，我声明了一个枚举:

In my MVVM WPF app, I have declared an enumeration:

查看模型:

namespace MyViewModel
{
    public class MyViewModelClass  
    {
      public enum MessageTypes
      {
          Info = 0,
          Error = 1
      };
    }
}

现在，我正在尝试从视图中访问它，以便将其用作控件中的静态资源，以便:

Now from the view I am trying to access it in order to use it as static resource in a control so:

查看:

xmlns:vm="clr-namespace:MyViewModel;assembly=MyViewModelAssembly"

<Image>
   <Image.Style>
        <Style TargetType="{x:Type Image}">
            <Setter Property="Source" Value="/Common.Images;component/Images/Info.png"/>
            <Style.Triggers>
                <DataTrigger Binding="{Binding MessageTypes}" Value="{x:Static vm:MessageTypes.Error}">
                    <Setter Property="Source" Value="/Common.Images;component/Images/Cancel.png"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
   </Image.Style>
</Image>

此处的问题是无法识别行Value="{x:Static vm:MessageTypes.Error}".编译错误:

The problem here is that line Value="{x:Static vm:MessageTypes.Error}" is not being recognized. Compilation error:

'MessageTypes' type not found.

推荐答案

枚举被声明为嵌套类型(在MyViewModelClass类中)，x:Static标记扩展不支持该枚举类型.

The enum is declared as a nested type (in class MyViewModelClass), which is not supported by the x:Static markup extension.

您应该这样声明:

namespace MyViewModel
{
    public enum MessageTypes
    {
        Info = 0,
        Error = 1
    }

    public class MyViewModelClass  
    {
        ...
    }
}

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