如何将枚举绑定到 WPF 中的组合框控件? [英] How to bind an enum to a combobox control in WPF?

问题描述

我试图找到一个简单的例子，其中枚举按原样显示.我见过的所有例子都试图添加漂亮的显示字符串，但我不想要那么复杂.

I am trying to find a simple example where the enums are shown as is. All examples I have seen tries to add nice looking display strings but I don't want that complexity.

基本上我有一个类来保存我绑定的所有属性，首先将 DataContext 设置为这个类，然后在 xaml 文件中像这样指定绑定:

Basically I have a class that holds all the properties that I bind, by first setting the DataContext to this class, and then specifying the binding like this in the xaml file:

<ComboBox ItemsSource="{Binding Path=EffectStyle}"/>

但这不会将 ComboBox 中的枚举值显示为项目.

But this doesn't show the enum values in the ComboBox as items.

推荐答案

您可以通过将以下代码放在 Window Loaded 事件处理程序中来从代码中完成，例如:

You can do it from code by placing the following code in Window Loaded event handler, for example:

yourComboBox.ItemsSource = Enum.GetValues(typeof(EffectStyle)).Cast<EffectStyle>();

如果您需要在 XAML 中绑定它，您需要使用 ObjectDataProvider 创建可用作绑定源的对象:

If you need to bind it in XAML you need to use ObjectDataProvider to create object available as binding source:

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:System="clr-namespace:System;assembly=mscorlib"
        xmlns:StyleAlias="clr-namespace:Motion.VideoEffects">
    <Window.Resources>
        <ObjectDataProvider x:Key="dataFromEnum" MethodName="GetValues"
                            ObjectType="{x:Type System:Enum}">
            <ObjectDataProvider.MethodParameters>
                <x:Type TypeName="StyleAlias:EffectStyle"/>
            </ObjectDataProvider.MethodParameters>
        </ObjectDataProvider>
    </Window.Resources>
    <Grid>
        <ComboBox ItemsSource="{Binding Source={StaticResource dataFromEnum}}"
                  SelectedItem="{Binding Path=CurrentEffectStyle}" />
    </Grid>
</Window>

注意下一个代码:

xmlns:System="clr-namespace:System;assembly=mscorlib"
xmlns:StyleAlias="clr-namespace:Motion.VideoEffects"

指导如何映射命名空间和程序集，您可以在 MSDN 上阅读.

Guide how to map namespace and assembly you can read on MSDN.

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