Asp.net mvc EF一对一关系不能选择包含的表数据

我必须列出：提供者、信息

信息表包含提供者数据。当我想查看包含数据的提供者列表时，它会说信息包含为空

我的提供者表：

public class provider
{
    public int id { get; set; }

    [Display(Name = "Username")]
    [StringLength(
        maximumLength: 100,
        MinimumLength = 2,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "StringLength")]
    [Required(
        AllowEmptyStrings = false,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "Required")]
    public string username { get; set; }

    [Display(Name = "Password")]
    [StringLength(
        maximumLength: 100,
        MinimumLength = 2,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "StringLength")]
    [Required(
        AllowEmptyStrings = false,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "Required")]
    public string password { get; set; }

    [Display(Name = "Email")]
    [StringLength(
        maximumLength: 100,
        MinimumLength = 2,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "StringLength")]
    public string email { get; set; }

    public virtual information information { get; set; }
}

及

资料表如下：

public class information
    {
        public int id { get; set; }
    [Display(Name = "Name")]
    [StringLength(
        maximumLength: 100,
        MinimumLength = 2,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "StringLength")]
    [Required(
        AllowEmptyStrings = false,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "Required")]
    public string name { get; set; }

    [Display(Name = "Tell")]
    [StringLength(
        maximumLength: 100,
        MinimumLength = 2,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "StringLength")]
    [Required(
        AllowEmptyStrings = false,
        ErrorMessageResourceType = typeof(Resources.Messages),
        ErrorMessageResourceName = "Required")]
    public string tellphone { get; set; }

    [Display(Name = "Location")]
    public DbGeography location { get; set; }

    public string exproviderusername { get; set; }
    public virtual provider provider { get; set; }

}

和提供商地图：

public providerMap()
{
    this.HasKey(x => x.username);

    this.Property(x => x.id)
        .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
}

和信息地图：

public informationMap()
        {
            this.Property(x => x.id)
                .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

            this.HasRequired(x => x.provider)
                .WithOptional(x => x.information)
                .WillCascadeOnDelete(true);
}

我的控制器索引选择为：

    var providers = db.providers.Include(p => p.information);
    return View(providers.ToList());

---

当我跟踪代码时，信息表为空。为什么它应该是空的？如何修复它？

您可以在provider类中添加一个字段

    [Key, ForeignKey("Information")]
    public class InformationId {get;set;}

---

它不会转到链接

您有一个1:0..1映射，并且使用实体框架，双方都需要共享同一个键。如果要使用

id

作为键，则不能使用

this.HasKey（x=>x.username）。如果您想为
提供程序
使用字符串键，则
信息
也需要使用字符串键。
谢谢您的评论，您正在使用DataAnnotations进行配置，但我是使用Fluent API进行配置的。我的地图就是这样做的。