WPF组合框双向绑定

我有一个简单的

组合框

，其中有一些简单的值。我正在尝试对模型上的枚举属性进行双向绑定

<ComboBox d:LayoutOverrides="Height" Grid.Column="1" SelectedItem="{Binding SortType, Converter={StaticResource sortSelect}, Mode=TwoWay}">
      <ListBoxItem Content="Ascending" Tag="Ascending"/>
      <ListBoxItem Content="Descending" Tag="Descending"/>
      <ListBoxItem Content="Absolute Ascending" Tag="AbsoluteAscending"/>
      <ListBoxItem Content="Absolute Descending" Tag="AbsoluteDescending" />
    </ComboBox>

ConvertBack

方法工作正常，并根据

ListBoxItem

中的

标记

值更新我的模型，但我无法获得初始

Enum

值来选择正确的

ListBoxItem

---

实现这一点的最佳方法是什么，或者是否有更好的方法绑定t

Enum

（考虑到我需要对每个

Enum

值进行自定义描述。

您可以这样做。首先为每个Enum值添加描述

public enum RdiSort
{ 
    [Description("Ascending Description")] 
    Ascending, 
    [Description("Descending Description")] 
    Descending, 
    [Description("AbsoluteAscending Description")] 
    AbsoluteAscending,
    [Description("AbsoluteDescending Description")] 
    AbsoluteDescending
} 

然后对组合框使用ObjectDataProvider

xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:MyEnumerations="clr-namespace:MyEnumerations" 

<ObjectDataProvider MethodName="GetValues" 
                    ObjectType="{x:Type sys:Enum}" 
                    x:Key="RdiSortValues"> 
    <ObjectDataProvider.MethodParameters> 
        <x:Type TypeName="MyEnumerations:RdiSort" /> 
    </ObjectDataProvider.MethodParameters> 
</ObjectDataProvider> 

---

这是我所做的解决方案

.xaml=>

<UserControl.Resources>
    <c:PriorityConvertor x:Key="priorityConvertor"></c:PriorityConvertor>
</UserControl.Resources>

}

请参见此问题：

<local:EnumDescriptionConverter x:Key="EnumDescriptionConverter"/>

<ComboBox SelectedItem="{Binding SortType}"
          ItemsSource="{Binding Source={StaticResource RdiSortValues}}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Converter={StaticResource EnumDescriptionConverter}}"/>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

public class EnumDescriptionConverter : IValueConverter
{
    private string GetEnumDescription(Enum enumObj)
    {
        FieldInfo fieldInfo = enumObj.GetType().GetField(enumObj.ToString());
        object[] attribArray = fieldInfo.GetCustomAttributes(false);
        if (attribArray.Length == 0)
        {
            return enumObj.ToString();
        }
        else
        {
            DescriptionAttribute attrib = attribArray[0] as DescriptionAttribute;
            return attrib.Description;
        }
    }

    object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value != null)
        {
            RdiSort myEnum = (RdiSort)value;
            string description = GetEnumDescription(myEnum);
            return description;
        }
        return null;
    }
    object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return string.Empty;
    }
}

<UserControl.Resources>
    <c:PriorityConvertor x:Key="priorityConvertor"></c:PriorityConvertor>
</UserControl.Resources>

public class PriorityConvertor : IValueConverter
{

    #region IValueConverter Members

    object IValueConverter.Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (value == null)
        {
            return string.Empty;
        }
        if (value.ToString() == "1")
        {
            return "High";
        }
        else if (value.ToString()  == "2")
        {
            return "Medium";
        }
        else if (value.ToString()  == "3")
        {
            return "Low";
        }
        return "Low";
    }

    object IValueConverter.ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }

    #endregion
}