将枚举数据绑定到WPF + MVVM中的ComboBox [英] Databinding an enum to a ComboBox in WPF + MVVM

问题描述

我在这里阅读了这个非常相关的问题，这是非常有帮助的，因为答案中的链接。我现在只是遇到了一个问题，现在要进行额外的步骤，并使其全部适用于MVVM模式。

I've read this very related question here on SO, and it was extremely helpful because of the link in the answer. I'm just having a problem now going the extra step and making it all work with the MVVM pattern.

让我们看看我的ViewModel，甚至模型）可以定义一个枚举：

Let's say I have my ViewModel, and it (or even the Model) could have an enum defined:

public enum MyTypes { Type1, Type2, Type3 };

我想将其数据绑定到我的GUI中的组合框。根据文章，我将使用一个ObjectDataProvider来调用MyTypes上的Enum.GetValues（）方法。所以我必须将MyTypes作为MethodParameter传递。但是你怎么通过类型？我已经尝试了各种方法，例如在XAML中添加对命名空间的引用：

I want to databind this to a ComboBox in my GUI. According to the article, I would use an ObjectDataProvider to invoke the Enum.GetValues() method on MyTypes. So I have to pass MyTypes as a MethodParameter. But how do you pass the type? I've tried various methods, like adding the reference to the namespace in XAML:

    <Window.Resources>
        <ObjectDataProvider MethodName="GetValues" ObjectType="{x:Type sys:Enum}" x:Key="TipHandlingValues">
            <ObjectDataProvider.MethodParameters>
                <!-- what goes here?  it's totally wrong. -->
                <my:MyTypes />
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>
    </Window.Resources>

几乎没有什么我会在那里甚至编译。有没有人知道如何通过这个小小的障碍？

Pretty much nothing I put there will even compile. Does anyone know how to get past this little hurdle?

推荐答案

看到我的这个SO帖子的答案：如何声明具有Itemsource作为枚举值的组合框项目模板WPF？

See my answer on this SO post: How to declare combobox itemTemplate that has Itemsource as Enum Values in WPF?

简而言之，在ObjectDataProvider.MethodParameters中，应该引用您在命名空间中引用的Enum的类型名称，即

In short, in the ObjectDataProvider.MethodParameters should refer to your Enum's type name as referenced in a namespace, i.e.,

<ObjectDataProvider.MethodParameters>
  <x:Type TypeName="my:MyTypes"/>
</ObjectDataProvider.MethodParameters>

这篇关于将枚举数据绑定到WPF + MVVM中的ComboBox的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！