c# - Entity Framework 中首先从数据库更新模型的元数据不起作用

Question

我想为模型添加更多验证消息注释(这里的所有模型都是首先由数据库生成的)，所以我确实通过此链接的帮助使用了元数据https://learn.microsoft.com/en-us/aspnet/mvc/overview/getting-started/database-first-development/enhancing-data-validation .没有更新任何模型，但构建失败并显示警告:

Error 6046: Unable to generate function import return type of the store function 'fn_diagramobjects'.

Error CS1061 'Account' does not contain a definition for 'ConfirmPassword' and no extension method 'ConfirmPassword' accepting a first argument of type 'Account' could be found (are you missing a using directive or an assembly reference?) project-asp-mvc D:.NET demo\Project\project-asp-mvc\Controllers\UserController.cs 85 Active

这是我从数据库生成的模型:

using System;
using System.Collections.Generic;

public partial class Account
{
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
    public Account()
    {
        this.Orders = new HashSet<Order>();
    }

    public string username { get; set; }
    public string password { get; set; }
    public Nullable<int> role_id { get; set; }

    public virtual Role Role { get; set; }
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
    public virtual ICollection<Order> Orders { get; set; }
}

元数据.cs:

using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Web;

namespace project_asp_mvc.Models
{
    public class AccountMetadata
    {
        [Required]
        [StringLength(50, ErrorMessage = "Username con not be longer than 50")]
        [EmailAddress]
        public string username { get; set; }

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

        [Required]
        [NotMapped]
        [DataType(DataType.Password)]
        [Compare("Password", ErrorMessage = "Please confirm your password again")]
        public string ConfirmPassword { get; set; }
    }
}

PartialClasses.cs

 using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Web;

 namespace project_asp_mvc.Models
 {
    [MetadataType(typeof(AccountMetadata))]
    public partial class Account
    {
    }
  }

Answer 1

AccountMetadata 类中的这些代码行来自何处​​。

[Required]
[NotMapped]
[DataType(DataType.Password)]
[Compare("Password", ErrorMessage = "Please confirm your password again")]
public string ConfirmPassword { get; set; }

您似乎已向帐户类中不存在的属性添加了注释。我建议您删除这些行并重试。