展会枚举说明，而不是名称 [英] Show Enum Description Instead of Name
问题描述
我已经绑定设置是这样的：
的ItemsSource ={绑定源= {我：枚举{X：类型信用：OccupationCategory}}}
的DisplayMemberPath =说明
的SelectedValue ={结合EmplType}
SelectedValuePath =值/＆GT;
和它的工作非常出色。不要在大型软件设计，我可以不再有任何产生INotifyPropertyChanged的事件，以便类型的数据绑定不起作用的变化。相反，我手动设置的selectedIndex和建设从code选项是这样的：
的ItemsSource ={绑定源= {StaticResource的ResidenceOwnershipType}}/＆GT;
该引用
＆LT; UserControl.Resources＆GT;
＆LT; ObjectDataProvider的X：键=ResidenceOwnershipType方法名=的GetValues对象类型={X：类型系统：枚举}＆GT;
＆LT; ObjectDataProvider.MethodParameters＆GT;
＆LT; X：类型类型名=信用：ResidenceOwnershipType/＆GT;
＆LT; /ObjectDataProvider.MethodParameters>
＆LT; / ObjectDataProvider的＆GT;
＆LT; /UserControl.Resources>
这工作尽可能的列表选项建设是关心，我的数据的链接，但我不能让组合框来显示枚举，而不是实际的文字说明标签。
我已经试过这样的事情：
的DisplayMemberPath =说明
但是这是不正确的。我将如何去这样做呢？
编辑：
我的枚举：
[DataContract]
公共枚举ResidenceOwnershipType
{
[描述（）]
无= 0，
[说明（拥有家庭夺标）]
OwnsHomeOutright = 1，
[说明（购买家）
BuyingHome = 2，
[说明（出租/租赁）] //这里奇怪的顺序反映RouteOne公司网站
RentingLeasing = 4，
[说明（生活W /亲属）]
LivingWithRelatives = 3，
[说明（拥有/购买移动主页）]
MobileHome = 5，
[说明（未知）]
未知= 6
}
如果你把这个的ItemsSource 你必须定义一个定制的<一个href=\"http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.itemtemplate.aspx\"><$c$c>ItemTemplate作为的DisplayMemberPath 就是你将无法取回描述经由该路径。
至于模板应该是什么样子：你可以绑定一个的TextBlock 来枚举值（当前的的DataContext ）和管道将通过<一href=\"http://msdn.microsoft.com/en-us/library/system.windows.data.ivalueconverter.aspx\"><$c$c>ValueConverter使用 Binding.Converter 。在code也只是一些反思检索说明（的GetType ， GetCustomAttributes 等）
替代品是一个自定义的方法，该方法返回一个使用的收集马上（在使用的ObjectDataProvider ）或自定义的markup扩展它做同样的事情。
方法例如，如果我们是在谈论一个 ComponentModel.DescriptionAttribute ：
公共静态类EnumUtility
{
//可能要返回一个命名的类型，这是一个懒惰的例子（它的工作，虽然）
公共静态对象[] GetValuesAndDescriptions（类型enumType）
{
VAR值= Enum.GetValues（enumType）.Cast＆LT;对象＆gt;（）;
从数值值VAR valuesAndDescriptions =
新选择
{
值=价值，
说明= value.GetType（）
.GetMember（value.ToString（））[0]
.GetCustomAttributes（真）
.OfType＆LT; DescriptionAttribute＆GT;（）
。第一（）
。描述
};
返回valuesAndDescriptions.ToArray（）;
}
}
＆LT; ObjectDataProvider的X：键=数据方法名=GetValuesAndDescriptions
对象类型=本地：EnumUtility＆GT;
＆LT; ObjectDataProvider.MethodParameters＆GT;
＆LT; X：TypeExtension类型名=本地：TestEnum/＆GT;
＆LT; /ObjectDataProvider.MethodParameters>
＆LT; / ObjectDataProvider的＆GT;
＆LT; ListBox中的ItemsSource ={绑定源= {StaticResource的数据}}
的DisplayMemberPath =说明
SelectedValuePath =值/＆GT;
I had databinding set up like this:
ItemsSource="{Binding Source={my:Enumeration {x:Type credit:OccupationCategory}}}"
DisplayMemberPath="Description"
SelectedValue="{Binding EmplType}"
SelectedValuePath="Value"/>
and it worked really well. Do to a change in the larger software design I can no longer have anything that generates an INotifyPropertyChanged Event so that type of databinding doesn't work. Instead I am manually setting the selectedIndex and building the options from code like this:
ItemsSource="{Binding Source={StaticResource ResidenceOwnershipType}}"/>
which references
<UserControl.Resources>
<ObjectDataProvider x:Key="ResidenceOwnershipType" MethodName="GetValues" ObjectType="{x:Type System:Enum}" >
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="credit:ResidenceOwnershipType" />
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
</UserControl.Resources>
That works as far as the building of the list options is concerned and the linking of all of my data, but I can't get the comboboxes to show the description tag in the enumeration instead of the actual text.
I've tried something like this:
DisplayMemberPath="Description"
but that wasn't correct. How would I go about doing this?
EDIT:
My Enum:
[DataContract]
public enum ResidenceOwnershipType
{
[Description("")]
None = 0,
[Description("Owns Home Outright")]
OwnsHomeOutright = 1,
[Description("Buying Home")]
BuyingHome = 2,
[Description("Renting/Leasing")] //Weird order here reflects RouteOne website
RentingLeasing = 4,
[Description("Living w/Relatives")]
LivingWithRelatives = 3,
[Description("Owns/Buying Mobile Home")]
MobileHome = 5,
[Description("Unknown")]
Unknown = 6
}
If you keep this ItemsSource you will have to define a custom ItemTemplate as the DisplayMemberPath is just a path via which you will not be able to retrieve the description.
As for what the template should look like: You can bind a TextBlock to the enum value (the current DataContext) and pipe that through a ValueConverter using Binding.Converter. The code would just be some reflection to retrieve the Description (GetType, GetCustomAttributes etc.)
Alternatives are a custom method that return a usable collection right away (and is used in the ObjectDataProvider) or a custom markup extension which does the same thing.
Method example if we are talking about a ComponentModel.DescriptionAttribute:
public static class EnumUtility
{
// Might want to return a named type, this is a lazy example (which does work though)
public static object[] GetValuesAndDescriptions(Type enumType)
{
var values = Enum.GetValues(enumType).Cast<object>();
var valuesAndDescriptions = from value in values
select new
{
Value = value,
Description = value.GetType()
.GetMember(value.ToString())[0]
.GetCustomAttributes(true)
.OfType<DescriptionAttribute>()
.First()
.Description
};
return valuesAndDescriptions.ToArray();
}
}
<ObjectDataProvider x:Key="Data" MethodName="GetValuesAndDescriptions"
ObjectType="local:EnumUtility">
<ObjectDataProvider.MethodParameters>
<x:TypeExtension TypeName="local:TestEnum" />
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
<ListBox ItemsSource="{Binding Source={StaticResource Data}}"
DisplayMemberPath="Description"
SelectedValuePath="Value"/>
这篇关于展会枚举说明，而不是名称的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
