如果您希望能够简单地从您的 XAML 中绑定一个枚举，您可以编写一个标记扩展类。我前段时间写了一篇关于它的博客文章：
http://simonkatanski.blogspot.com/2013/02/enum-combobox-using-markupextension.html
代码如下：
public class EnumValuesExtension : MarkupExtension
{
private Type _enumType;
private String _resourceName;
private bool _addEmptyValue = false;
// Enumeration type
public Type EnumType
{
set { _enumType = value; }
}
// Name of the class of the .resx file
public String ResourceName
{
set { _resourceName = value; }
}
// Add empty value flag
public Boolean AddEmptyValue
{
set { _addEmptyValue = value; }
}
public EnumValuesExtension()
{
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
// Enumeration type not passed through XAML
if (_enumType == null)
throw new ArgumentNullException("EnumType (Property not set)");
if (!_enumType.IsEnum)
throw new ArgumentNullException("Property EnumType must be an enum");
// Bindable properties list
List<dynamic> list = new List<dynamic>();
if (!String.IsNullOrEmpty(_resourceName))
{
// Name of the resource class
Type type = Type.GetType(_resourceName);
if (type == null)
throw new ArgumentException(
"Resource name should be a fully qualified name");
// We iterate through the Enum values
foreach (var enumName in Enum.GetNames(_enumType))
{
string translation = string.Empty;
var property = type.GetProperty(enumName,
BindingFlags.Static |
BindingFlags.Public |
BindingFlags.NonPublic);
// If there's not translation for specific Enum value,
// there'll be a message shown instead
if (property == null)
translation = String.Format(
"Field {0} not found in the resource file {1}",
enumName,
_resourceName);
else
translation = property.GetValue(null, null).ToString();
list.Add(GetNamed(translation, enumName));
}
// Adding empty row
if (_addEmptyValue)
list.Add(GetEmpty());
return list;
}
// If there's no resource provided Enum values will be used
// without translation
foreach (var enumName in Enum.GetNames(_enumType))
list.Add(GetNamed(enumName, enumName));
if (_addEmptyValue)
list.Add(GetEmpty());
return list;
}
// Create one item which will fill our ComboBox ItemSource list
private dynamic GetNamed(string translation, string enumName)
{
// We create a bindable context
dynamic bindableResult = new ExpandoObject();
// This dynamically created property will be
// bindable from XAML (through DisplayMemberPath or wherever)
bindableResult.Translation = translation;
// We're setting the value, which will be passed to SelectedItem
// of the ComboBox
bindableResult.Enum = enumName;
return bindableResult;
}
// Create one empty item which will fill our ComboBox ItemSource list
private dynamic GetEmpty()
{
dynamic bindableResult = new ExpandoObject();
bindableResult.Translation = String.Empty;
bindableResult.Enum = null;
return bindableResult;
}
}
你可以像这样在你的代码中使用这个类：
<StackPanel>
<ComboBox Height="100" Width="200"
SelectedValuePath="Enum"
DisplayMemberPath="Translation"
ItemsSource="{Binding Source={local:EnumValues EnumType=local:TestEnum}}"
Margin="98,0,76,0"
SelectedValue="{Binding SelectedItemInYourViewModel}"/>
</StackPanel>
然后您所做的就是将您的 Enum 作为上述 xaml 中的 Enum 类型传递。这样你就可以有一个通用的方式来使用来自 xaml 的枚举。
我在这里粘贴的版本和博客中的版本有额外的代码用于热切换值及其翻译的等效项（如果您正在处理多语言应用程序） - 您应该能够轻松删除它代码。