MvvM中ComboBox绑定枚举值_mvvmlight 枚举 combox

定义枚举值：

public enum Subjects
{
    语文,
    数学,
    英语,
    体育
}

方式一：

xaml文件：需要引入xmlns:core="clr-namespace:System;assembly=mscorlib"；其中枚举我是写在ViewModel中的，所以还需要引入xmlns:viewModel="clr-namespace:WriteTXT.ViewModels"

<Window.Resources>
    <ObjectDataProvider x:Key="Subjects" MethodName="GetValues" ObjectType="{x:Type core:Enum}">
        <ObjectDataProvider.MethodParameters>
            <x:Type Type="viewModel:Subjects"/>
        </ObjectDataProvider.MethodParameters>
    </ObjectDataProvider>
</Window.Resources>

<ComboBox ItemsSource="{Binding Source={StaticResource Subjects}}" SelectedItem="{Binding Subject1}"/>
<Label Grid.Column="1" Content="{Binding Sub1}"/>

ViewModel代码：

private Subjects _subject1;
 
public Subjects Subject1
{
    get { return _subject1; }
    set
    {
        _subject1 = value;
        Sub1 = value.ToString();
        this.RaisePropertyChanged("Subject1");
    }
}
 
private string _sub1 = "初始值";
 
public string Sub1
{
    get { return _sub1; }
    set
    {
        _sub1 = value;
        this.RaisePropertyChanged("Sub1");
    }
}

方式二：

xaml文件：是SelectedValue而不是SelectedItem

<ComboBox ItemsSource="{Binding Subs}" DisplayMemberPath="Value" SelectedValuePath="Key" SelectedValue="{Binding Subject1}"/>
<Label Grid.Column="1" Content="{Binding Sub1}"/>

ViewModel代码：

private Dictionary<Subjects, string> _subs;
 
public Dictionary<Subjects, string> Subs
{
    get { return _subs; }
    set
    {
        _subs = value;
        this.RaisePropertyChanged("Subs");
    }
}
 
public MainWindowViewModel()
{
    Subs = new Dictionary<Subjects, string>();
    foreach (Subjects em in Enum.GetValues(typeof(Subjects)))
        Subs[em] = "学科:" + em.ToString();
}