Asp.net mvc 如何从自定义ModelBinder中调用UpdateModel？（MVC）

我正在为模型中的复杂类型创建一些自定义绑定。我的模型由具有各自独立绑定的对象组成。我希望基础对象完成它的脏活，然后通过传递到标准ModelBinder路由来填充它封装的复杂对象。我该怎么做

为了便于说明，我创建了一个非常简单的示例

假设我的模型包含这些对象

public class Person
{
    public string Name {get; set;}
    public PhoneNumber PhoneNumber {get; set;}
}

public class PhoneNumber
{
    public string AreaCode {get; set;}
    public string LocalNumber {get; set;}
}

我为每个模型都提供了以下活页夹。并非PersonBinder需要填充PhoneNumber，而是不想在PhoneNumber binder中复制代码。它如何委托回到标准活页夹路线

public class PersonBinder: IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext     bindingContext)
    {
        Person person = new Person();
        person.Name = bindingContext.ValueProvider.GetValue(String.Format("{0}.{1}", bindingContext.ModelName, "Name")).AttemptedValue

        // This is where I'd like to have the PhoneNumber object use binding from another customer ModelBinder.
        // Of course the bindingContext.ModelName should be updated to its current value + "PhoneNumber"
        person.PhoneNumber = ???;  // I don't want to explicitly call the PhoneNumberBinder it should go through standard Binding routing.  (ie.  ModelBinders.Binders[typeof(PhoneNumber)] = new PhoneNumberBinder();)

        return person;       
    }
}

public class PhoneNumberBinder: IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext     bindingContext)
    {
        PhoneNumber phoneNumber = new PhoneNumber();
        phoneNumber.AreaCode = bindingContext.ValueProvider.GetValue(String.Format("{0}.{1}", bindingContext.ModelName, "AreaCode")).AttemptedValue
        phoneNumber.LocalNumber = bindingContext.ValueProvider.GetValue(String.Format("{0}.{1}", bindingContext.ModelName, "LocalNumber")).AttemptedValue

        return phoneNumber;
    }
}

当然，我已经在Global.asax.cs文件中注册了我的ModelBinder

protected void Application_Start()
{
    AreaRegistration.RegisterAllAreas();

    RegisterRoutes(RouteTable.Routes);

    ModelBinders.Binders[typeof(Person)] = new PersonBinder();
    ModelBinders.Binders[typeof(PhoneNumber)] = new PhoneNumberBinder();
}

谢谢

---

Justin

您可以使用AutoMapper并在操作中处理复杂的模型构造，而不是编写活页夹

我设法想出了一个解决办法。请随时评论其有效性

public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
     Person person = new Person();
     person.Name = bindingContext.ValueProvider.GetValue("Name").AttemptedValue

     if (bindingContext.ModelName == String.Empty)
     {
         bindingContext.ModelName = "PhoneNumber";
     }
     else
     {
         bindingContext.ModelName = bindingContext.ModelName + ".PhoneNumber";
     }

     PhoneNumber phoneNumber = new PhoneNumber();
     bindingContext.ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => phoneNumber, phoneNumber.GetType());

     IModelBinder binder = ModelBinders.Binders[typeof(PhoneNumber)];
     if (binder == null)
     {
          binder = ModelBinders.Binders.DefaultBinder;
     }

     person.PhoneNumber = binder.BindModel(controllerContext, bindingContext) as PhoneNumber;

     return person;                         
}

下面是我所做工作的总结

使用全局可访问的ModelBinders.Binders集合查找ModelBinder（如果未注册，则返回默认值）

为绑定到的模型创建ModelMetadataProvider

将bindingContext的ModelName属性设置为我尝试填充的model属性（“PhoneNumber”）

---

谢谢你的建议，但我不认为汽车制造商是我的工具。似乎是一个解决办法。我相信活页夹应该在本机上支持此功能。