blocks|key|896251|text|绑定到模型上的钩子属性又如何呢？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|896252|public+class+SomeModel
{
+++public+MyEnum+EnumValue+{+get;+set;+}
+++public+int+BindToThisGuy
+++{
++++++get+{+return+(int)+EnumValue;+}
++++++set+{+EnumValue+=+(MyEnum)value;+}
+++}
}|code-block|syntax|javascript|896253|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

What about binding to a hook property on your model?

<pre><code>public class SomeModel
{
 public MyEnum EnumValue { get; set; }
 public int BindToThisGuy
 {
 get { return (int) EnumValue; }
 set { EnumValue = (MyEnum)value; }
 }
}
</code></pre>

blocks|key|896324|text|好了伙计们。我已经寻找了一些方法来做到这一点，因为我厌倦了编写愚蠢的工作来克服.Net框架中的这个缺陷。基于几个线程，我编写了以下解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|896325|免责声明，这不是一个完全自动化的解决方案，因此它不会适用于所有人。考虑到我的实现，它是有效的。也许我的方法会帮助别人设计出对他们有用的东西。|896326|首先，我创建了一个枚举存储库。枚举不必驻留在这里，但它们需要从存储库中可见。|896327|在存储库中，我创建了一个类和一个公共静态属性来公开枚举类型列表。|896328|namespace+MyApp.Enums
{
++++public+enum+ATS_Tabs+{+TabOne+=+0,+TabTwo+=+1,+TabThree+=+2,+TabFour+=+3,+TabFive+=+4+};

++++public+class+ModelEnums
++++{
++++++++public+static+IEnumerable<Type>+Types
++++++++{
++++++++++++get
++++++++++++{
++++++++++++++++List<Type>+Types+=+new+List<Type>();
++++++++++++++++Types.Add(typeof(ATS_Tabs));
++++++++++++++++return+Types;
++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|896329|接下来，我创建了一个模型绑定器并实现了IModelBinder接口(ref.kdawg的评论和链接)。|896330|namespace+MyApp.CustomModelBinders
{
++++public+class+EnumModelBinder+:+IModelBinder
++++{
++++++++public+object+BindModel(ControllerContext+controllerContext,+ModelBindingContext+bindingContext)
++++++++{
++++++++++++ValueProviderResult+valueResult+=+bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
++++++++++++ModelState+modelState+=+new+ModelState+{+Value+=+valueResult+};
++++++++++++object+actualValue+=+null;

++++++++++++try
++++++++++++{
++++++++++++++++return+Enum.ToObject(Type.GetType(bindingContext.ModelType.AssemblyQualifiedName),+Convert.ToInt32(valueResult.AttemptedValue));
++++++++++++}
++++++++++++catch+(FormatException+e)
++++++++++++{
++++++++++++++++modelState.Errors.Add(e);
++++++++++++}

++++++++++++bindingContext.ModelState.Add(bindingContext.ModelName,+modelState);
++++++++++++return+actualValue;
++++++++}
++++}
}|896331|添加一些代码以确保valueResult.AttemptedValue转换不会失败可能会有所帮助。|896332|接下来，我遍历了上面创建的枚举类型列表，并为它们添加了模型绑定(...in+Global.asax.cs)。|896333|++++protected+void+Application_Start()
++++{
++++++++AreaRegistration.RegisterAllAreas();

++++++++foreach+(Type+type+in+ModelEnums.Types)
++++++++{
++++++++++++ModelBinders.Binders.Add(type,+new+EnumModelBinder());
++++++++}

++++++++RegisterGlobalFilters(GlobalFilters.Filters);
++++++++RegisterRoutes(RouteTable.Routes);
++++}|896334|我承认，这不是最直观的方式，但它对我很有效。如果我可以优化这一点，请随时告诉我。|896335|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|16|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|17|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|18|8|@]|9|@]|A|$]]|$1|U|3|V|5|J|7|19|8|@]|9|@]|A|$K|L]]|$1|W|3|X|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Y|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|Z|$]]

Ok guys. I've looked up a few ways to do this because I was tired of writing stupid work around to get past this deficiency in the .Net framework. Based on a couple of threads, I have composed the following solution.

Disclaimer, this is not a totally automated solution, so it will not work for all. Given my implementation, it works. Maybe my way will help someone else design something that will work for them.

First, I created an enum respository. The enums don't have to reside here, but they would need to be visible from the repository. 

In the repository, I created a class and a public static property to expose a list of enum types.

<pre><code>namespace MyApp.Enums
{
 public enum ATS_Tabs { TabOne = 0, TabTwo = 1, TabThree = 2, TabFour = 3, TabFive = 4 };

 public class ModelEnums
 {
 public static IEnumerable&lt;Type&gt; Types
 {
 get
 {
 List&lt;Type&gt; Types = new List&lt;Type&gt;();
 Types.Add(typeof(ATS_Tabs));
 return Types;
 }
 }
 }
}
</code></pre>

Next, I created a model binder and implemented the IModelBinder interface (ref. kdawg's comment and link).

<pre><code>namespace MyApp.CustomModelBinders
{
 public class EnumModelBinder : IModelBinder
 {
 public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
 {
 ValueProviderResult valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
 ModelState modelState = new ModelState { Value = valueResult };
 object actualValue = null;

 try
 {
 return Enum.ToObject(Type.GetType(bindingContext.ModelType.AssemblyQualifiedName), Convert.ToInt32(valueResult.AttemptedValue));
 }
 catch (FormatException e)
 {
 modelState.Errors.Add(e);
 }

 bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
 return actualValue;
 }
 }
}
</code></pre>

It might help to add some code to ensure the conversion of valueResult.AttemptedValue doesn't fail.

Next, I looped through the list of enum types I created above and added model binders for them (...in Global.asax.cs).

<pre><code> protected void Application_Start()
 {
 AreaRegistration.RegisterAllAreas();

 foreach (Type type in ModelEnums.Types)
 {
 ModelBinders.Binders.Add(type, new EnumModelBinder());
 }

 RegisterGlobalFilters(GlobalFilters.Filters);
 RegisterRoutes(RouteTable.Routes);
 }
</code></pre>

I admit, this it not the most intuitive way, but it works great for me. Feel free to let me know if I can optimize this.

I have a method in my controller that accepts an object as an argument and returns a <a href="https://msdn.microsoft.com/en-us/library/system.web.mvc.jsonresult(v=vs.118).aspx" rel="nofollow noreferrer">JsonResult</a>. One of the properties on this object is an enum with three possible values. I assumed that when the client passed in an int for that property it would populate the enum, but it doesn't, it defaults to 0 and the enum is set to the first of it's possible selections.

Any suggestions?

Model Binding to Enums in ASP.NET MVC 3

我的控制器中有一个方法，它接受一个对象作为参数并返回一个。此对象的属性之一是具有三个可能值的枚举。我假设当客户端为该属性传入一个int时，它将填充枚举，但它没有，它缺省为0，枚举被设置为它可能选择的第一个。有什么建议吗？

问在ASP.NET MVC3中绑定到枚举的模型
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