DefaultExpressionVisitor.VisitFunctionAggregate 方法
[本页针对的是实体框架版本 6。最新版本以“实体框架”NuGet 包的形式提供。有关实体框架的更多信息,请参见 msdn.com/data/ef。]
实现函数聚合的访问者模式。
命名空间: System.Data.Entity.Core.Common.CommandTrees
程序集: EntityFramework(在 EntityFramework.dll 中)
语法
声明
Protected Overridable Function VisitFunctionAggregate ( _
aggregate As DbFunctionAggregate _
) As DbFunctionAggregate
用法
Dim aggregate As DbFunctionAggregate
Dim returnValue As DbFunctionAggregate
returnValue = Me.VisitFunctionAggregate(aggregate)
protected virtual DbFunctionAggregate VisitFunctionAggregate(
DbFunctionAggregate aggregate
)
protected:
virtual DbFunctionAggregate^ VisitFunctionAggregate(
DbFunctionAggregate^ aggregate
)
abstract VisitFunctionAggregate :
aggregate:DbFunctionAggregate -> DbFunctionAggregate
override VisitFunctionAggregate :
aggregate:DbFunctionAggregate -> DbFunctionAggregate
protected function VisitFunctionAggregate(
aggregate : DbFunctionAggregate
) : DbFunctionAggregate
参数
- aggregate
类型:System.Data.Entity.Core.Common.CommandTrees.DbFunctionAggregate
聚合。
返回值
类型:System.Data.Entity.Core.Common.CommandTrees.DbFunctionAggregate
实现的访问者模式。