仅更新模型的一部分，验证问题？

Question

我有一个注册页面，用户可以在其中输入他的名字、姓氏、电子邮件和密码，以及其他字段。

我已将验证属性绑定到此模型（称为“用户”并通过 LINQtoSQL 创建）并且一切正常。

型号代码：

[MetadataType(typeof(UserValidation))]
public partial class User { }

[Bind(Exclude = "UserID")]
[PropertiesMustMatch("Password", "ConfirmPassword", ErrorMessage = "The password and confirm password don't match.")]
public class UserValidation 
{
    [Required(ErrorMessage = "First name required"), StringLength(20, MinimumLength=3, ErrorMessage = "Must be between 3 and 20 characters")]
    public string FirstName { get; set; }

    [Required(ErrorMessage = "Last name required"), StringLength(20, MinimumLength = 3, ErrorMessage = "Must be between 3 and 20 characters")]
    public string LastName { get; set; }

    [Required(ErrorMessage = "Email address required"), RegularExpression("^[a-z0-9_\\+-]+(\\.[a-z0-9_\\+-]+)*@[a-z0-9-]+(\\.[a-z0-9-]+)*\\.([a-z]{2,4})$", ErrorMessage = "Must be a valid email address")]
    public string Email { get; set; }

    [Required(ErrorMessage = "Password required"), StringLength(20, MinimumLength = 6, ErrorMessage = "Password must be between 6 and 20 characters")]
    public string Password { get; set; }

    [Required(ErrorMessage = "Confirm password required"), StringLength(20, MinimumLength = 6, ErrorMessage = "Password must be between 6 and 20 characters")]
    public string ConfirmPassword { get; set; }

}

注册和登录后，我希望用户能够在一个视图中编辑他们的名字、姓氏和电子邮件（我们称之为“帐户”字段），并在另一个视图中编辑“密码”。这就是我的问题所在。

当我通过注册中使用的同一模型（“用户”）提交更新帐户字段数据的表单时，IsValid 方法会针对缺少的“密码”字段显示 ModelState 错误。

控制器代码：

    //
    // GET /Talent/Account
    public ActionResult Account()
    {
        string cookieUser = User.Identity.Name;
        User user = userRepository.GetUserByEmail(cookieUser);
        return View(user);
    }

    // POST /Talent/Account
    [HttpPost]
    public ActionResult Account(User model)
    {

        if (ModelState.IsValid)
        {
    // do something
            ModelState.AddModelError("", "All good.. "+ model.FirstName + " - " + model.LastName);
        }

        return View(model);
    }

我怎样才能解决这个问题？最佳实践等...

Answer 1

在 Model-View-ViewModel (MVVM) 方式中，您应该创建两个 ViewModel：一个用于创建新帐户，另一个用于编辑名称字段而无需密码。

将验证属性应用于您的 ViewModel，而不是直接应用于您的模型。

一些示例包装 ViewModel 类：

        [Bind(Exclude = "UserID")]    
        public class UserForAccountEdit
        {
            public User UserAccount { get; set; }

            [Required(ErrorMessage = "First name required"), StringLength(20, MinimumLength=3, ErrorMessage = "Must be between 3 and 20 characters")]  
            public string FirstName  
            {  
              get 
                   { return UserAccount.FirstName };  
              set
                   { UserAccount.FirstName = value; }
            }  

            ...
        }    



        [Bind(Exclude = "UserID")]
        [PropertiesMustMatch("Password", "ConfirmPassword", ErrorMessage = "The password and confirm password don't match.")]
        public class UserForAccountCreation
        {
            public User UserAccount { get; set; }

            [Required(ErrorMessage = "First name required"), StringLength(20, MinimumLength=3, ErrorMessage = "Must be between 3 and 20 characters")]  
            public string FirstName  
            {  
              get 
                   { return UserAccount.FirstName };  
              set
                   { UserAccount.FirstName = value; }
            }  

            ...
        }