RelationalQueryableMethodTranslatingExpressionVisitor.TranslateFirstOrDefault Method
Definition
Important
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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.ShapedQueryExpressionProtected Overrides Function TranslateFirstOrDefault (source As ShapedQueryExpression, predicate As LambdaExpression, returnType As Type, returnDefault As Boolean) As ShapedQueryExpressionParameters
- 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
The shaped query after translation.
Applies to
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Entity Framework