MVC3远程验证

    public class StudentModel

    {

        [Display(Name="学生编号")]

        public int StuId { set; get; }

        [Required(ErrorMessage="请输入学生姓名！")]

        [StringLength(,ErrorMessage="姓名长度不能长于10！")]

        [Display(Name="学生姓名")]

        [Remote("ValirStuName","Student",HttpMethod="Post",ErrorMessage="学生姓名已经存在！")]

        public string StuName { set; get; }

        [Display(Name="学生Email")]

        [DataType(DataType.EmailAddress)]

        public string StuSex { set; get; }

        [Display(Name="班级ID")]

        public int Gid { set; get; }

        [Display(Name="学生描述")]

        public string StuDesc { set; get; }

    }

Controller:

        /// <summary>

        /// 参数名称与Model中的名称一致

        /// </summary>

        /// <param name="StuName"></param>

        /// <returns></returns>

        public ActionResult ValirStuName(string StuName)

        {

            return Json(true);

            //return Json("你所填写的用户名，已经存在了!");//当返回不为true时，则默认认为验证失败及自定义的错误信息

            //return new JsonResult { Data=false,JsonRequestBehavior=JsonRequestBehavior.AllowGet };

        }