SQL表到实体的转换.Net EF 5代码优先

本文关键字：EF 代码 Net 转换 实体 SQL | 更新日期: 2023-09-27 18:05:39

我正在尝试转换旧的网站使用ASP。Net 4.5和EF5代码第一，但有一个表从旧网站我不知道如何转换，因为它有两个列，两者都引用同一列在它的父表。谁能帮我转换这张桌子?

    CREATE TABLE dbo.tblCollectionsList
    (
        ListID smallint IDENTITY(0,1) NOT NULL,
        SectionID smallint NOT NULL,
        IncludedSectionID smallint NOT NULL,
        CONSTRAINT PK_CollectionsList_ListID PRIMARY KEY CLUSTERED (ListID ASC),
        CONSTRAINT FK_CollectionList_SectionInfo FOREIGN KEY (SectionID) REFERENCES dbo.tblSectionInfo (SectionID),
        CONSTRAINT FK_CollectionList_SectionInfo2 FOREIGN KEY (IncludedSectionID) REFERENCES dbo.tblSectionInfo (SectionID)
    )

SQL表到实体的转换.Net EF 5代码优先

请原谅表名的个人偏好，但您面临的问题是级联删除，您可以在模型创建中关闭此行为:

[Table("Section")]
public class Section
{
    [Key]
    public virtual int Id { get; set; }
    public virtual string Description { get; set; }
}
[Table("List")]
public class List
{
    [Key]
    public virtual int Id { get; set; }
    [Required]
    [ForeignKey("Section")]
    public virtual int SectionId { get; set; }
    public virtual Section Section { get; set; }
    [Required]
    [ForeignKey("IncludedSection")]
    public virtual int IncludedSectionId { get; set; }
    public virtual Section IncludedSection { get; set; }
}
public class SectionContext : DbContext
{
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<OneToManyCascadeDeleteConvention>();   
        base.OnModelCreating(modelBuilder);
    }
    public DbSet<Section> Sections { get; set; }
    public DbSet<List> Lists { get; set; }
}

这是使用属性，你也可以做同样的事情没有属性，而不是使用OnModelCreating中的FluentApi。

[Table("tblCollectionsList")]
public class CollectionsList
{
[Key]
public byte ListID {get;set;}
public byte SectionID {get;set;}
public byte IncludedSectionID {get;set;}
[ForeignKey("SectionID")]
public virtual Section Section {get;set;}
[ForeignKey("IncludedSectionID")]
public virtual Section IncludedSection {get;set;}
}
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