您可以使用自定义模型联编程序。我们举个例子吧。
型号:
public class MyViewModel
{
public IList<BaseClass> Children { get; set; }
}
public abstract class BaseClass
{
public int Id { get; set; }
[HiddenInput(DisplayValue = false)]
public string ModelType
{
get { return GetType().FullName; }
}
}
public class Derived1 : BaseClass
{
public string Derived1Property { get; set; }
}
public class Derived2 : BaseClass
{
public string Derived2Property { get; set; }
}
控制器:
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new MyViewModel
{
Children = new BaseClass[]
{
new Derived1 { Id = 1, Derived1Property = "prop1" },
new Derived2 { Id = 2, Derived2Property = "prop2" },
}
};
return View(model);
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
// everything will be fine and dandy here
...
}
}
视图(~/Views/Home/Index.cshtml
):为Dervied1
类型
@model MyViewModel
@using (Html.BeginForm())
{
for (int i = 0; i < Model.Children.Count; i++)
{
@Html.EditorFor(x => x.Children[i].ModelType)
<div>
@Html.EditorFor(x => x.Children[i].Id)
@Html.EditorFor(x => x.Children[i])
</div>
}
<button type="submit">OK</button>
}
编辑器模板(~/Views/Home/EditorTemplates/Derived1.cshtml
):
@model Derived1
@Html.EditorFor(x => x.Derived1Property)
,为Dervied2
类型(~/Views/Home/EditorTemplates/Derived2.cshtml
)编辑模板:
@model Derived2
@Html.EditorFor(x => x.Derived2Property)
现在,所有剩下的就是将使用隐藏字段的值来实例化适当的类型集合中的自定义模型绑定:
public class BaseClassModelBinder : DefaultModelBinder
{
protected override object CreateModel(ControllerContext controllerContext, ModelBindingContext bindingContext, Type modelType)
{
var typeValue = bindingContext.ValueProvider.GetValue(bindingContext.ModelName + ".ModelType");
var type = Type.GetType(
(string)typeValue.ConvertTo(typeof(string)),
true
);
var model = Activator.CreateInstance(type);
bindingContext.ModelMetadata = ModelMetadataProviders.Current.GetMetadataForType(() => model, type);
return model;
}
}
将在Application_Start
注册:
ModelBinders.Binders.Add(typeof(BaseClass), new BaseClassModelBinder());
太棒了......那是一种享受......我不得不回去工作,让笔记本电脑试试这个,因为它看起来很棒......在我开始的周末,甚至开始之前 – Jon