模型中的IList模型未在Get操作中获取

Question

我有三个模型，如下面

第一

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window.addEventListener('resize',setImg);

第二

public partial class provider_preapproval
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public long preapproval_id { get; set; }

    .......
    public DateTime? sync_time { get; set; }

    public  IList<provider_diagnosis_dtls> provider_diagnosis_dtls { get; set; }

    public IList<provider_service_dtls> provider_service_dtls { get; set; }

}

第三

 public partial class provider_diagnosis_dtls
 {
     [Key]
     [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
     public long diagnosis_id { get; set; }

     public long preapproval_id { get; set; }

     ..........................

 }

其中第一个模型中的public partial class provider_service_dtls { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public long service_id { get; set; } public long preapproval_id { get; set; } .................. } 在保存到db时用作两者的外键。它成功保存了详细信息。

但是，当我调用模型显示preapproval_id和provider_diagnosis_dtls时，它将显示如下：（

我的控制器

provider_service_dtls

我在做什么是错的。请帮忙。

Answer 1

列表为空，因为在表示数据库记录的类型之间没有指定关系。为了做到这一点，您需要指定导航属性并使用Text和ForeignKeyAttribute的正确组合来装饰它们：

InversePropertyAttribute

请注意，我将导航属性标记为public partial class provider_preapproval { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public long preapproval_id { get; set; } [InverseProperty("preapproval")] public virtual IList<provider_diagnosis_dtls> provider_diagnosis_dtls { get; set; } [InverseProperty("preapproval")] public virtual IList<provider_service_dtls> provider_service_dtls { get; set; } //... } public partial class provider_diagnosis_dtls { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public long diagnosis_id { get; set; } public long preapproval_id { get; set; } [ForeignKey("preapproval_id"), InverseProperty("provider_diagnosis_dtls ")] public virtual provider_preapproval preapproval { get; set; } //... } public partial class provider_service_dtls { [Key] [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public long service_id { get; set; } public long preapproval_id { get; set; } [ForeignKey("preapproval_id"), InverseProperty("provider_service_dtls")] public virtual provider_preapproval preapproval { get; set; } //... } ，以便它们是延迟加载的（在访问属性时从数据库加载，而不是在加载＆＃34;所有者＆＃34;对象 - 它的时候加载有点按需加载政策。