自定义模型绑定派生属性不工作 [英] Custom model binding on derived property not working
问题描述
我有一个自定义的模型绑定器(MVC3)没有被解雇的某些原因。以下是code的相关部分:
I have a custom ModelBinder (MVC3) that isn't getting fired for some reason. Here are the relevant pieces of code:
查看
@model WebApp.Models.InfoModel
@using Html.BeginForm()
{
@Html.EditorFor(m => m.Truck)
}
EditorTemplate
@model WebApp.Models.TruckModel
@Html.EditorFor(m => m.CabSize)
ModelBinder的
public class TruckModelBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
throw new NotImplementedException();
}
}
的Global.asax
protected void Application_Start()
{
...
ModelBinders.Binders.Add(typeof(TruckModel), new TruckModelBinder());
...
}
InfoModel
public class InfoModel
{
public VehicleModel Vehicle { get; set; }
}
VehicleModel
public class VehicleModel
{
public string Color { get; set; }
public int NumberOfWheels { get; set; }
}
TruckModel
public class TruckModel : VehicleModel
{
public int CabSize { get; set; }
}
控制器
public ActionResult Index(InfoModel model)
{
// model.Vehicle is *not* of type TruckModel!
}
为什么不是我的自定义ModelBinder的射击?
Why isn't my custom ModelBinder firing?
推荐答案
您必须将模型绑定与基类关联:
You will have to associate the model binder with the base class:
ModelBinders.Binders.Add(typeof(VehicleModel), new TruckModelBinder());
您POST操作采用其本身具有的类型VehicleModel的车辆属性的InfoModel参数。因此MVC有结合过程中没有TruckModel的知识。
Your POST action takes an InfoModel parameter which itself has a Vehicle property of type VehicleModel. So MVC has no knowledge of TruckModel during the binding process.
您可以看一看的<一个href=\"http://stackoverflow.com/questions/6484972/viewmodel-with-listbaseclass-and-editor-templates/6485552#6485552\">following发布implemeting多态模型绑定的例子。
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