Question

为什么我的MVC验证中ModelState.IsValid总是为true?

public class HomeController : Controller    {         public ActionResult Create()        {            return View("Create");        }        [HttpPost]        [AcceptVerbs(HttpVerbs.Post)]        public ActionResult Create(Role role)        {            if (ModelState.IsValid)            {                return this.View("RoleList");            }            return this.View(role);        }    } public partial class Role    {        public bool IsValid        {            get { return (GetRuleViolations().Count() == 0); }        }        public IEnumerable<RuleViolation> GetRuleViolations()        {            if (String.IsNullOrEmpty(RoleID))                yield return new RuleViolation("RoleID不能为空", "RoleID");            yield break;        }    }    public class RuleViolation    {        public string ErrorMessage { get; private set; }        public string PropertyName { get; private set; }        public RuleViolation(string errorMessage, string propertyName)        {            ErrorMessage = errorMessage;            PropertyName = propertyName;        }    }

Answer 1

MVC是为了解决WebForm由于控件所产生的一系列问题，比如庞大的ViewState，对于非企业的WebSite来说是不可承受的

至于OO的问题MVC只会更加符合OO的理论