CustomValidation in ASP.NET MVC

We can do validation at model level. The CustomValidation property can do almost everything you want, it is similar than web form's CustomValidation server control. Cool~ The following code shows an example of CustomValidation property.

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.ComponentModel.DataAnnotations;using System.ComponentModel.DataAnnotations.Schema;namespace JMS.Models{    public class Auction    {        public long Id { get; set; }        [Required,StringLength(20)]        public string Title { get; set; }                public decimal StartPrice { get; set; }        [CustomValidation(typeof(Auction),"ValidateCurrentPrice")]        public decimal CurrentPrice { get; set; }        public DateTime StartTime { get; set; }                public DateTime EndTime { get; set; }        public void SaveNew()        {            using(var context = new JMSDataContext())            {                context.Auctions.Add(this);                context.SaveChanges();            }        }        public static ValidationResult ValidateCurrentPrice(decimal value, ValidationContext pValidationContext)        {            decimal startPrice = ((Auction)pValidationContext.ObjectInstance).StartPrice;            if (value <= startPrice)            {                return new ValidationResult("Curret price 必须大于 Start Price", new List<string> { "StartPrice", "CurrentPrice" });            }            return ValidationResult.Success;        }    }}