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RelationalQueryableMethodTranslatingExpressionVisitor.TranslateFirstOrDefault Method

  • Reference

Definition

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

Translates First<TSource>(IQueryable<TSource>) method or FirstOrDefault<TSource>(IQueryable<TSource>) and their other overloads over the given source.

protected override Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression TranslateFirstOrDefault (Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression source, System.Linq.Expressions.LambdaExpression predicate, Type returnType, bool returnDefault);
protected override Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression? TranslateFirstOrDefault (Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression source, System.Linq.Expressions.LambdaExpression? predicate, Type returnType, bool returnDefault);
override this.TranslateFirstOrDefault : Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression * System.Linq.Expressions.LambdaExpression * Type * bool -> Microsoft.EntityFrameworkCore.Query.ShapedQueryExpression
Protected Overrides Function TranslateFirstOrDefault (source As ShapedQueryExpression, predicate As LambdaExpression, returnType As Type, returnDefault As Boolean) As ShapedQueryExpression

Parameters

source
ShapedQueryExpression

The shaped query on which the operator is applied.

predicate
LambdaExpression

The predicate supplied in the call.

returnType
Type

The return type of result.

returnDefault
Boolean

A value indicating whether default should be returned or throw.

Returns

ShapedQueryExpression

The shaped query after translation.

Applies to