ValueGeneratorCache.GetOrAdd 方法
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
重载
GetOrAdd(IProperty, IEntityType, Func<IProperty,IEntityType,ValueGenerator>) |
从缓存中获取现有值生成器,如果缓存中不存在值生成器,则创建一个新值生成器。 |
GetOrAdd(IProperty, ITypeBase, Func<IProperty,ITypeBase,ValueGenerator>) |
从缓存中获取现有值生成器,如果缓存中不存在值生成器,则创建一个新值生成器。 |
GetOrAdd(IProperty, IEntityType, Func<IProperty,IEntityType,ValueGenerator>)
从缓存中获取现有值生成器,如果缓存中不存在值生成器,则创建一个新值生成器。
public virtual Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator GetOrAdd (Microsoft.EntityFrameworkCore.Metadata.IProperty property, Microsoft.EntityFrameworkCore.Metadata.IEntityType entityType, Func<Microsoft.EntityFrameworkCore.Metadata.IProperty,Microsoft.EntityFrameworkCore.Metadata.IEntityType,Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> factory);
abstract member GetOrAdd : Microsoft.EntityFrameworkCore.Metadata.IProperty * Microsoft.EntityFrameworkCore.Metadata.IEntityType * Func<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Metadata.IEntityType, Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> -> Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator
override this.GetOrAdd : Microsoft.EntityFrameworkCore.Metadata.IProperty * Microsoft.EntityFrameworkCore.Metadata.IEntityType * Func<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Metadata.IEntityType, Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> -> Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator
Public Overridable Function GetOrAdd (property As IProperty, entityType As IEntityType, factory As Func(Of IProperty, IEntityType, ValueGenerator)) As ValueGenerator
参数
- property
- IProperty
要获取其值生成器的属性。
- entityType
- IEntityType
值生成器将用于的实体类型。 当对派生实体类型的继承属性调用时,此实体类型可能与上声明的实体类型不同 property
- factory
- Func<IProperty,IEntityType,ValueGenerator>
工厂:如果缓存中不存在值生成器,则创建新的值生成器。
返回
现有或新创建的值生成器。
实现
适用于
GetOrAdd(IProperty, ITypeBase, Func<IProperty,ITypeBase,ValueGenerator>)
从缓存中获取现有值生成器,如果缓存中不存在值生成器,则创建一个新值生成器。
public virtual Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator GetOrAdd (Microsoft.EntityFrameworkCore.Metadata.IProperty property, Microsoft.EntityFrameworkCore.Metadata.ITypeBase typeBase, Func<Microsoft.EntityFrameworkCore.Metadata.IProperty,Microsoft.EntityFrameworkCore.Metadata.ITypeBase,Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> factory);
abstract member GetOrAdd : Microsoft.EntityFrameworkCore.Metadata.IProperty * Microsoft.EntityFrameworkCore.Metadata.ITypeBase * Func<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Metadata.ITypeBase, Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> -> Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator
override this.GetOrAdd : Microsoft.EntityFrameworkCore.Metadata.IProperty * Microsoft.EntityFrameworkCore.Metadata.ITypeBase * Func<Microsoft.EntityFrameworkCore.Metadata.IProperty, Microsoft.EntityFrameworkCore.Metadata.ITypeBase, Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator> -> Microsoft.EntityFrameworkCore.ValueGeneration.ValueGenerator
Public Overridable Function GetOrAdd (property As IProperty, typeBase As ITypeBase, factory As Func(Of IProperty, ITypeBase, ValueGenerator)) As ValueGenerator
参数
- property
- IProperty
要获取其值生成器的属性。
- typeBase
- ITypeBase
值生成器将用于的实体类型。 当对派生实体类型的继承属性调用时,此实体类型可能与上声明的实体类型不同 property
- factory
- Func<IProperty,ITypeBase,ValueGenerator>
工厂:如果缓存中不存在值生成器,则创建新的值生成器。
返回
现有或新创建的值生成器。