EntityTypeBuilder<TEntity>.HasDiscriminator<TDiscriminator> 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Metadata.Builders

程序集:

Microsoft.EntityFrameworkCore.dll

包:

Microsoft.EntityFrameworkCore v8.0.0

配置用于标识存储区中的实体类型的鉴别器属性。

public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.DiscriminatorBuilder<TDiscriminator> HasDiscriminator<TDiscriminator> (System.Linq.Expressions.Expression<Func<TEntity,TDiscriminator>> propertyExpression);

override this.HasDiscriminator : System.Linq.Expressions.Expression<Func<'Entity, 'Discriminator>> -> Microsoft.EntityFrameworkCore.Metadata.Builders.DiscriminatorBuilder<'Discriminator>

Public Overridable Function HasDiscriminator(Of TDiscriminator) (propertyExpression As Expression(Of Func(Of TEntity, TDiscriminator))) As DiscriminatorBuilder(Of TDiscriminator)

类型参数

TDiscriminator

鉴别器属性中存储的值的类型。

参数

propertyExpression

Expression<Func<TEntity,TDiscriminator>>

lambda 表达式，表示要用作鉴别器 ( blog => blog.Discriminator) 的属性。

返回

DiscriminatorBuilder<TDiscriminator>

允许配置鉴别器属性的生成器。