QueryableMethodTranslatingExpressionVisitor.TranslateSingleOrDefault Método

  • Referência

Definição

Namespace:
Microsoft.EntityFrameworkCore.Query
Assembly:
Microsoft.EntityFrameworkCore.dll
Pacote:
Microsoft.EntityFrameworkCore v3.0.0
Pacote:
Microsoft.EntityFrameworkCore v3.1.0
Pacote:
Microsoft.EntityFrameworkCore v5.0.0
Pacote:
Microsoft.EntityFrameworkCore v6.0.0
Pacote:
Microsoft.EntityFrameworkCore v7.0.0
Pacote:
Microsoft.EntityFrameworkCore v8.0.0

Converte o Single<TSource>(IQueryable<TSource>) método ou SingleOrDefault<TSource>(IQueryable<TSource>) e suas outras sobrecargas sobre a origem fornecida.

protected abstract Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression TranslateSingleOrDefault (Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression source, System.Linq.Expressions.LambdaExpression predicate, Type returnType, bool returnDefault);
protected abstract Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression? TranslateSingleOrDefault (Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression source, System.Linq.Expressions.LambdaExpression? predicate, Type returnType, bool returnDefault);
abstract member TranslateSingleOrDefault : Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression * System.Linq.Expressions.LambdaExpression * Type * bool -> Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression
Protected MustOverride Function TranslateSingleOrDefault (source As ShapedQueryExpression, predicate As LambdaExpression, returnType As Type, returnDefault As Boolean) As ShapedQueryExpression

Parâmetros

source
ShapedQueryExpression

A consulta em forma na qual o operador é aplicado.

predicate
LambdaExpression

O predicado fornecido na chamada.

returnType
Type

O tipo de retorno do resultado.

returnDefault
Boolean

Um valor que indica se o padrão deve ser retornado ou gerado.

Retornos

ShapedQueryExpression

A consulta em forma após a tradução.

Aplica-se a