共用方式為


OwnedNavigationBuilder<TOwnerEntity,TDependentEntity>.HasKey 方法

定義

多載

HasKey(Expression<Func<TDependentEntity,Object>>)

設定組成這個擁有之實體類型之主鍵的屬性。

HasKey(String[])

設定組成這個擁有之實體類型之主鍵的屬性。

HasKey(Expression<Func<TDependentEntity,Object>>)

設定組成這個擁有之實體類型之主鍵的屬性。

public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder HasKey (System.Linq.Expressions.Expression<Func<TDependentEntity,object>> keyExpression);
public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder<TDependentEntity> HasKey (System.Linq.Expressions.Expression<Func<TDependentEntity,object>> keyExpression);
public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder<TDependentEntity> HasKey (System.Linq.Expressions.Expression<Func<TDependentEntity,object?>> keyExpression);
override this.HasKey : System.Linq.Expressions.Expression<Func<'DependentEntity, obj>> -> Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder
override this.HasKey : System.Linq.Expressions.Expression<Func<'DependentEntity, obj>> -> Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder<'DependentEntity (requires 'DependentEntity : null)>
Public Overridable Function HasKey (keyExpression As Expression(Of Func(Of TDependentEntity, Object))) As KeyBuilder
Public Overridable Function HasKey (keyExpression As Expression(Of Func(Of TDependentEntity, Object))) As KeyBuilder(Of TDependentEntity)

參數

keyExpression
Expression<Func<TDependentEntity,Object>>

lambda 運算式,表示主鍵屬性 () (blog => blog.Url) 。

如果主鍵是由多個屬性所組成,請指定匿名型別,包括屬性 (post => new { post.Title, post.BlogId }) 。

傳回

KeyBuilder<TDependentEntity>

物件,可用來設定主鍵。

適用於

HasKey(String[])

設定組成這個擁有之實體類型之主鍵的屬性。

public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder<TDependentEntity> HasKey (params string[] propertyNames);
override this.HasKey : string[] -> Microsoft.EntityFrameworkCore.Metadata.Builders.KeyBuilder<'DependentEntity (requires 'DependentEntity : null)>
Public Overridable Function HasKey (ParamArray propertyNames As String()) As KeyBuilder(Of TDependentEntity)

參數

propertyNames
String[]

組成主鍵的屬性名稱。

傳回

KeyBuilder<TDependentEntity>

物件,可用來設定主鍵。

適用於