C# 一个表属性与两个表属性相关.NET MVC

我有一个名为News的表，我想存储高质量和低质量的图像以及每个新图像的信息，因此，我创建了另一个名为NewsAttachment的表，该表应该与News相关，但我已经创建了另一个名为NewsComment的表，该表也与News相关，当我想将两者定义为外键时，SQL Server在新闻和新闻附件中添加另一列

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这是新闻课程：

public class News
{
    [Key]
    public int NewsId { get; set; } //primary key
    .
    .
    .
    //navigation property
    public virtual List<Comments> Comments { get; set; }
    public virtual List<NewsAttachments> Comments { get; set; }
    public News()
    {

    }
}

public class Comments
{
    [Key]
    public int CommentId { get; set; }

    [Required]
    public int NewsId { get; set; }  //Foreign key of News
    .
    .
    .
    //navigation property
    public virtual News News { get; set; }
    public Comments()
    {

    }
}

public class NewsAttachment
{
    [Key]
    public int NewsAttachmentId { get; set; }

    [Required]
    public int NewsId { get; set; }  //Foreign key of News


    //Image information property
    public string FileName { get; set; }
    public string RealFileName { get; set; }
    public string FilePath { get; set; }
    public string FilePageType { get; set; }

    //navigation property
    public News News { get; set; }
    public NewsAttachment()
    {

    }
}

---

这是新闻附件课程：

public class News
{
    [Key]
    public int NewsId { get; set; } //primary key
    .
    .
    .
    //navigation property
    public virtual List<Comments> Comments { get; set; }
    public virtual List<NewsAttachments> Comments { get; set; }
    public News()
    {

    }
}

public class Comments
{
    [Key]
    public int CommentId { get; set; }

    [Required]
    public int NewsId { get; set; }  //Foreign key of News
    .
    .
    .
    //navigation property
    public virtual News News { get; set; }
    public Comments()
    {

    }
}

public class NewsAttachment
{
    [Key]
    public int NewsAttachmentId { get; set; }

    [Required]
    public int NewsId { get; set; }  //Foreign key of News


    //Image information property
    public string FileName { get; set; }
    public string RealFileName { get; set; }
    public string FilePath { get; set; }
    public string FilePageType { get; set; }

    //navigation property
    public News News { get; set; }
    public NewsAttachment()
    {

    }
}

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我的问题摘要： 我希望News中的NewsId与表中的其他两个属性有关系，但它遇到了问题

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如果无法解决此问题，请为我提供另一种方法，将我的两张照片及其信息保存在我的数据库中。

您必须向EF明确声明，以便EF知道哪个是外键：

public class NewsAttachment
{
    [Key]
    public int NewsAttachmentId { get; set; }

    public int NewsId { get; set; }  //Foreign key of News    

    //Image information property
    public string FileName { get; set; }
    public string RealFileName { get; set; }
    public string FilePath { get; set; }
    public string FilePageType { get; set; }

    [ForeignKey("NewsId")]
    public News News { get; set; }
    public NewsAttachment()
    {

    }
}

---

您必须专门向EF声明它，以便它知道哪个是外键：

public class NewsAttachment
{
    [Key]
    public int NewsAttachmentId { get; set; }

    public int NewsId { get; set; }  //Foreign key of News    

    //Image information property
    public string FileName { get; set; }
    public string RealFileName { get; set; }
    public string FilePath { get; set; }
    public string FilePageType { get; set; }

    [ForeignKey("NewsId")]
    public News News { get; set; }
    public NewsAttachment()
    {

    }
}

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如果任何新闻都有几个unicue附件，我看不出有任何问题。如果相同的附件可以用于不同的新闻？如果任何新闻有多个unicue附件，我看不出有任何问题。如果相同的附件可以用于不同的新闻？