MutableEntityTypeExtensions.AddForeignKey 方法

定义

命名空间:

Microsoft.EntityFrameworkCore

程序集:

Microsoft.EntityFrameworkCore.dll

包:

Microsoft.EntityFrameworkCore v5.0.0

向此实体类型添加新关系。

public static Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey AddForeignKey (this Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType entityType, Microsoft.EntityFrameworkCore.Metadata.IMutableProperty property, Microsoft.EntityFrameworkCore.Metadata.IMutableKey principalKey, Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType principalEntityType);

static member AddForeignKey : Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType * Microsoft.EntityFrameworkCore.Metadata.IMutableProperty * Microsoft.EntityFrameworkCore.Metadata.IMutableKey * Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType -> Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey

<Extension()>
Public Function AddForeignKey (entityType As IMutableEntityType, property As IMutableProperty, principalKey As IMutableKey, principalEntityType As IMutableEntityType) As IMutableForeignKey

参数

entityType

IMutableEntityType

实体类型。

property

IMutableProperty

定义外键时所基于的属性。

principalKey

IMutableKey

引用的主键或备用键。

principalEntityType

IMutableEntityType

作为关系目标的实体类型。 这可能不同于关系面向继承层次结构 (派生类型时定义的类型 principalKey ，因为键是在层次结构) 基类型上定义的。

返回

IMutableForeignKey

新建的外键。