MVC 2数据注释问题(MVC 2 Data annotations problem)

 现在生气了。 我有一个MVC解决方案，我已经从MVC 1升级到2.一切正常....除了验证！ 
 
 这是一些代码： 
 
 在控制器中： 
 
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Security.Principal;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.Web.UI;
using MF.Services.Authentication;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace MF.Controllers
{
     //basic viewmodel
     public class LogOnViewData
     {
     [Required]
     public string UserName { get; set; }

     [Required]
     public string Password { get; set; }
     }

    [HandleError]
public class AccountController : Controller
{
         [HttpPost]
         public ActionResult LogOn(LogOnViewData lvd, string returnUrl)
         {

         if (ModelState.IsValid)
         {
        //do stuff - IsValid is always true
         }
         }
    }
}
 
 ModelState始终有效。 然而，该模型正在正确填充。 因此，如果我将用户名和密码都留空，并发布表单，则模型状态仍然有效。 哎呀！ 
 
 额外信息：使用IoD的结构图。 以前，在升级到MVC 2之前使用的是MS数据注释库，所以在我的global.asax.cs中有这个：ModelBinders.Binders.DefaultBinder = new Microsoft.Web.Mvc.DataAnnotations.DataAnnotationsModelBinder（）; 
 
 现在已经删除了。 
 
 我确信我正在做一些非常基本和错误的事情。 如果有人能指出这将是奇妙的。 干杯 

Going mad now. I have a MVC solution that i've upgraded from MVC 1 to 2. It all works fine.... except the Validation!
 
Here's some code:
 
In the controller:
 
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Security.Principal;
using System.Web;
using System.Web.Mvc;
using System.Web.Security;
using System.Web.UI;
using MF.Services.Authentication;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;

namespace MF.Controllers
{
     //basic viewmodel
     public class LogOnViewData
     {
     [Required]
     public string UserName { get; set; }

     [Required]
     public string Password { get; set; }
     }

    [HandleError]
public class AccountController : Controller
{
         [HttpPost]
         public ActionResult LogOn(LogOnViewData lvd, string returnUrl)
         {

         if (ModelState.IsValid)
         {
        //do stuff - IsValid is always true
         }
         }
    }
}
 
The ModelState is always valid. The model is being populated correctly however. Therefore, if I leave both username and password blank, and post the form the model state is still valid. Argh!
 
Extra info: using structure map for IoD. Previously, before upgrading to MVC 2 was using the MS data annotation library so had this in my global.asax.cs: ModelBinders.Binders.DefaultBinder = new Microsoft.Web.Mvc.DataAnnotations.DataAnnotationsModelBinder();
 
Have removed that now.
 
I'm sure i'm doing something really basic and wrong. If someone could point it out that would be marvellous. Cheers

原文：https://stackoverflow.com/questions/2472025