Asp.net mvc4验证检查属性值是否相同

Question

我试图比较密码并使用验证属性在表单上确认密码，但是当我在两个字段上使用不同值提交表单时，错误不会显示在旁边确认密码字段。

我试过这个question MVC3验证的方法，但它没有帮助。

这里是源代码：

//Model 
using System; 
using System.Collections.Generic; 
using System.ComponentModel.DataAnnotations; 
using System.ComponentModel.DataAnnotations.Schema; 
using System.Data.Entity; 
using System.Globalization; 
using System.Web.Security; 
using System.Web.Mvc; 
using mvcdemo.Validation; 

namespace mvcdemo.Models 
{ 
    public class User:IValidatableObject 
    { 
     public int userid { get; set; } 
     [Required] 
     [Remote("Username", "User",ErrorMessage = "The username is not allowed.")] //remote server validation asynchronous 
     public string username { get; set; } 
     public string password { get; set; } 

     [PasswordCreationRule("password",ErrorMessage ="Password and Confirm Password have to be the same")] 
     public string ConfirmPassword { get; set; } 

     public string email { get; set; } 
     public int roleid { get; set; } 
     [Required] 
     [Display(Name = "Password at first logon status")] 
     public string passwordatfirstlogonstatus { get; set; } 

    } 

    public class UserDBContext : DbContext 
    { 
     public DbSet<User> users { get; set; } 
    } 
    public class administrator : User 
    { 

    } 

} 

// Validation class 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using System.ComponentModel.DataAnnotations; 
using System.Reflection; 

namespace mvcdemo.Validation 
{ 
    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = false, Inherited = true)] 
    public class PasswordCreationRuleAttribute:ValidationAttribute 
    { 
     private const string defaultErrorMessage = "{0} cannot be different same as {1}."; 
     private string otherProperty; 
     public PasswordCreationRuleAttribute(string otherProperty): base(defaultErrorMessage) 
     { 
      if(string.IsNullOrEmpty(otherProperty)) 
      { 
       throw new ArgumentNullException("otherProperty"); 

      } 
      this.otherProperty = otherProperty; 
     } 
     public override string FormatErrorMessage(string name) 
     { 
      return string.Format(ErrorMessageString, name, otherProperty); 
     } 
     protected override ValidationResult IsValid(object value,ValidationContext validationContext) 
     { 
      if (value != null) 
      { 
       PropertyInfo otherPropertyInfo = validationContext.ObjectInstance.GetType().GetProperty(otherProperty); 
       if (otherPropertyInfo == null) 
       { 
        return new ValidationResult(string.Format("Property '{0}' is undefined.", otherProperty)); 
       } 

       var otherPropertyValue = otherPropertyInfo.GetValue(validationContext.ObjectInstance, null); 

       if (otherPropertyValue != null) 
       { 
        if (value.Equals(otherPropertyValue)) 
        { 
         return ValidationResult.Success; 
        } 
        else 
        { 
         return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName)); 

        } 
       } 
      } 
       return new ValidationResult(this.FormatErrorMessage(validationContext.DisplayName)); 

     } 
    } 
} 

Answer 1

您可以使用比较属性为确认密码：

public string password { get; set; } 

[Compare("Password", ErrorMessage = "Password and Confirm Password have to be the same")] 
public string ConfirmPassword { get; set; }