通过

IMutableEntityType.RemoveForeignKey 方法

  • 参考

定义

命名空间:
Microsoft.EntityFrameworkCore.Metadata
程序集:
Microsoft.EntityFrameworkCore.dll
包:
Microsoft.EntityFrameworkCore v3.0.0
包:
Microsoft.EntityFrameworkCore v3.1.0
包:
Microsoft.EntityFrameworkCore v5.0.0
包:
Microsoft.EntityFrameworkCore v6.0.0
包:
Microsoft.EntityFrameworkCore v7.0.0
包:
Microsoft.EntityFrameworkCore v8.0.0
包:
Microsoft.EntityFrameworkCore v1.0.6
包:
Microsoft.EntityFrameworkCore v1.1.6
包:
Microsoft.EntityFrameworkCore v2.0.3
包:
Microsoft.EntityFrameworkCore v2.1.11
包:
Microsoft.EntityFrameworkCore v2.2.6

重载

RemoveForeignKey(IMutableForeignKey)

从此实体类型中删除外键。
RemoveForeignKey(IReadOnlyForeignKey)

从此实体类型中删除外键。
RemoveForeignKey(IReadOnlyList<IProperty>, IKey, IEntityType)

从此实体中删除关系。
RemoveForeignKey(IReadOnlyList<IReadOnlyProperty>, IMutableKey, IMutableEntityType)

从此实体类型中删除外键。

RemoveForeignKey(IMutableForeignKey)

从此实体类型中删除外键。

public void RemoveForeignKey (Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey foreignKey);
public Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey RemoveForeignKey (Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey foreignKey);
abstract member RemoveForeignKey : Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey -> unit
abstract member RemoveForeignKey : Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey -> Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey
Public Sub RemoveForeignKey (foreignKey As IMutableForeignKey)
Public Function RemoveForeignKey (foreignKey As IMutableForeignKey) As IMutableForeignKey

参数

foreignKey
IMutableForeignKey

要删除的外键。

返回

IMutableForeignKey

删除的外键。

适用于

RemoveForeignKey(IReadOnlyForeignKey)

从此实体类型中删除外键。

public Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey? RemoveForeignKey (Microsoft.EntityFrameworkCore.Metadata.IReadOnlyForeignKey foreignKey);
abstract member RemoveForeignKey : Microsoft.EntityFrameworkCore.Metadata.IReadOnlyForeignKey -> Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey
Public Function RemoveForeignKey (foreignKey As IReadOnlyForeignKey) As IMutableForeignKey

参数

foreignKey
IReadOnlyForeignKey

要删除的外键。

返回

IMutableForeignKey

删除的外键; null 如果未找到索引，则为 。

适用于

RemoveForeignKey(IReadOnlyList<IProperty>, IKey, IEntityType)

从此实体中删除关系。

public Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey RemoveForeignKey (System.Collections.Generic.IReadOnlyList<Microsoft.EntityFrameworkCore.Metadata.IProperty> properties, Microsoft.EntityFrameworkCore.Metadata.IKey principalKey, Microsoft.EntityFrameworkCore.Metadata.IEntityType principalEntityType);
abstract member RemoveForeignKey : System.Collections.Generic.IReadOnlyList<Microsoft.EntityFrameworkCore.Metadata.IProperty> * Microsoft.EntityFrameworkCore.Metadata.IKey * Microsoft.EntityFrameworkCore.Metadata.IEntityType -> Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey
Public Function RemoveForeignKey (properties As IReadOnlyList(Of IProperty), principalKey As IKey, principalEntityType As IEntityType) As IMutableForeignKey

参数

properties
IReadOnlyList<IProperty>

定义外键时的属性。

principalKey
IKey

引用的主键或备用键。

principalEntityType
IEntityType

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

返回

IMutableForeignKey

已删除的外键。

适用于

RemoveForeignKey(IReadOnlyList<IReadOnlyProperty>, IMutableKey, IMutableEntityType)

从此实体类型中删除外键。

public Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey? RemoveForeignKey (System.Collections.Generic.IReadOnlyList<Microsoft.EntityFrameworkCore.Metadata.IReadOnlyProperty> properties, Microsoft.EntityFrameworkCore.Metadata.IMutableKey principalKey, Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType principalEntityType);
abstract member RemoveForeignKey : System.Collections.Generic.IReadOnlyList<Microsoft.EntityFrameworkCore.Metadata.IReadOnlyProperty> * Microsoft.EntityFrameworkCore.Metadata.IMutableKey * Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType -> Microsoft.EntityFrameworkCore.Metadata.IMutableForeignKey
Public Function RemoveForeignKey (properties As IReadOnlyList(Of IReadOnlyProperty), principalKey As IMutableKey, principalEntityType As IMutableEntityType) As IMutableForeignKey

参数

properties
IReadOnlyList<IReadOnlyProperty>

定义外键时的属性。

principalKey
IMutableKey

引用的主键或备用键。

principalEntityType
IMutableEntityType

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

返回

IMutableForeignKey

删除的外键; null 如果未找到索引，则为 。

适用于