Question

有两种型号
用户

public class User
{
private const int NameLength = 200;
private const int EmailLength = 100;

[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }

[StringLength(NameLength)]
public string Name { get; set; }

[Required]
[EmailAddress]
[StringLength(EmailLength)]
public string Email { get; set; }

[Required]
[DataType(DataType.Password)]
[StringLength(200)]
public string Password { get; set; }

public string PasswordSalt { get; set; }

[Required]
[DefaultValue(UserType.User)]
public UserType Type { get; set; }

[DefaultValue(true)]
public bool IsActive { get; set; }

public virtual List<Task> Tasks { get; set; }

public User()
{
    Tasks = new List<Task>();
}
}
[Flags]
public enum UserType
{
    Admin = 0,
    User = 1
}

我用来注册用户的

和 RegisterUserModel

public class RegisterUserModel
{
    private const int NameLength = 200;
    private const int EmailLength = 100;
    private const int PasswordMinLength = 5;
    private const int PasswordMaxLength = 20;

    [Key]
    public int Id { get; set; }

    [Required]
    [StringLength(NameLength)]
    public string Name { get; set; }

    [Required]
    [EmailAddress]
    [StringLength(EmailLength)]
    public string Email { get; set; }

    [Required]
    [DataType(DataType.Password)]
    [StringLength(PasswordMaxLength, MinimumLength = PasswordMinLength)]
    public string Password { get; set; }
}

这是我控制器的方法

[HttpPost]
[AjaxAction]
public ActionResult Registration(RegisterUserModel registerUser)
{

if (ModelState.IsValid)
{
    if (!IsUserExist(registerUser.Email))
    {    
        var crypto = new SimpleCrypto.PBKDF2();

        var encrpPass = crypto.Compute(registerUser.Password);

        var newUser = db.Users.Create();

        newUser.Name = registerUser.Name;
        newUser.Email = registerUser.Email;
        newUser.Type = UserType.User;
        newUser.IsActive = true;

        newUser.Password = encrpPass;
        newUser.PasswordSalt = crypto.Salt;

        db.Users.Add(newUser);
        db.SaveChanges();

        FormsAuthentication.SetAuthCookie(newUser.Email, false); 

        return Json(new {status = "OK", message = "Success"}, JsonRequestBehavior.AllowGet);
    }
    return Json(new { status = "ERROR", message = "User already exists" }, JsonRequestBehavior.AllowGet);
}
return Json(new { status = "ERROR", message = "Data is incorrect" }, JsonRequestBehavior.AllowGet);
}

我不喜欢设置值

newUser.Type = UserType.User;
newUser.IsActive = true;

手动控制器中的

虽然我的用户模型中有这些默认值，但我认为这不是很好的做法，但我不知道如何避免它？ / p>

Answer 1

DefaultValueAttribute不会按照您的想法执行操作，即实际在属性上设置实际值。如果您希望该属性具有默认值，那么您需要一个自定义的getter和setter：

private UserType? type;
public UserType Type
{
    get { return type ?? UserType.User; }
    set { type = value; }
}

Answer 2

在这种情况下，您可以使用属性为User设置值，也可以创建构造函数并在其中设置这些属性。

如果您不想手动设置属性，可以使用AutoMapper（http://automapper.org/）等映射工具为您进行映射。

此致

代码首先在数据库中添加默认字段值（ASP.NET MVC）

2 个答案: