共用方式為

ISqlExpressionFactory.MakeUnary 方法

  • 參考

定義

命名空間:
Microsoft.EntityFrameworkCore.Query
組件:
Microsoft.EntityFrameworkCore.Relational.dll
套件:
Microsoft.EntityFrameworkCore.Relational v3.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v3.1.0
套件:
Microsoft.EntityFrameworkCore.Relational v5.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v6.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v7.0.0
套件:
Microsoft.EntityFrameworkCore.Relational v8.0.0

使用指定的引數建立新的 SqlUnaryExpression 。

public Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression MakeUnary (System.Linq.Expressions.ExpressionType operatorType, Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression operand, Type type, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping typeMapping = default);
public Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression? MakeUnary (System.Linq.Expressions.ExpressionType operatorType, Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression operand, Type type, Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping? typeMapping = default);
abstract member MakeUnary : System.Linq.Expressions.ExpressionType * Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlExpression * Type * Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping -> Microsoft.EntityFrameworkCore.Query.SqlExpressions.SqlUnaryExpression
Public Function MakeUnary (operatorType As ExpressionType, operand As SqlExpression, type As Type, Optional typeMapping As RelationalTypeMapping = Nothing) As SqlUnaryExpression

參數

operatorType
ExpressionType

， ExpressionType 表示 SQL 一元運算子。

operand
SqlExpression

要 SqlExpression 套用一元運算子的 。

type
Type

所建立運算式的類型。

typeMapping
RelationalTypeMapping

要指派給所建立運算式的類型對應。

傳回

SqlUnaryExpression

SqlUnaryExpression具有指定引數的 。

適用於