SqlExpressionVisitor.VisitProjection(ProjectionExpression) 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Query

程序集:

Microsoft.EntityFrameworkCore.Relational.dll

包:

Microsoft.EntityFrameworkCore.Relational v8.0.0

访问投影表达式的子级。

protected abstract System.Linq.Expressions.Expression VisitProjection (Microsoft.EntityFrameworkCore.Query.SqlExpressions.ProjectionExpression projectionExpression);

abstract member VisitProjection : Microsoft.EntityFrameworkCore.Query.SqlExpressions.ProjectionExpression -> System.Linq.Expressions.Expression

Protected MustOverride Function VisitProjection (projectionExpression As ProjectionExpression) As Expression

参数

projectionExpression

ProjectionExpression

要访问的表达式。

返回

Expression

如果修改了该表达式或任何子表达式，则为修改后的表达式；否则返回原始表达式。