使用枚举作为键绑定到Dictionary中的值

Question

我是一些应用程序,我想将一些文本框和chekcbox绑定到Dictionary(Enum,string)的值字段.这是可能的,我该怎么做？

在xaml代码中我有这样的东西 - 它用于字典,字符串作为键,但它无法正确绑定到枚举键

<dxe:TextEdit EditValue="{Binding Properties[PrimaryAddress],  Mode=TwoWay}" />
<dxe:TextEdit EditValue="{Binding Properties[SecondaryAddress],  Mode=TwoWay}" />
<dxe:CheckEdit EditValue="{Binding Properties[UsePrimaryAddress], Mode=TwoWay}" />

..这就是我在Enum中所拥有的

public enum MyEnum
{
    PrimaryAddress,
    SecondaryAddress,
    UsePrimaryAddress
}

在ViewModel字典中定义为:

public Dictionary<MyEnum, string> Properties

我找到了具有枚举值的combobox解决方案,但这不适用于我的情况.

有什么建议？

Answer 1

您必须在绑定表达式中为索引器的参数设置适当的类型.

查看型号:

public enum Property
{
    PrimaryAddress,
    SecondaryAddress,
    UsePrimaryAddress
}

public class ViewModel
{
    public ViewModel()
    {
        Properties = new Dictionary<Property, object>
        {
            { Property.PrimaryAddress, "123" },
            { Property.SecondaryAddress, "456" },
            { Property.UsePrimaryAddress, true }
        };
    }

    public Dictionary<Property, object> Properties { get; private set; }
}

XAML:

<Window x:Class="WpfApplication5.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication5"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>

        <TextBox Grid.Row="0" Text="{Binding Path=Properties[(local:Property)PrimaryAddress]}"/>
        <TextBox Grid.Row="1" Text="{Binding Path=Properties[(local:Property)SecondaryAddress]}"/>
        <CheckBox Grid.Row="2" IsChecked="{Binding Path=Properties[(local:Property)UsePrimaryAddress]}"/>
    </Grid>
</Window>

代码隐藏:

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        DataContext = new ViewModel();
    }
}

有关详细信息,请参阅" 绑定路径语法 ".