DbExpressionBuilder.Select<TProjection> Method

Reference

Definition

Namespace:: System.Data.Entity.Core.Common.CommandTrees.ExpressionBuilder

Assembly:: EntityFramework.dll

Important

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Creates a new DbProjectExpression that selects the specified expression over the given input set.

public static System.Data.Entity.Core.Common.CommandTrees.DbProjectExpression Select<TProjection> (this System.Data.Entity.Core.Common.CommandTrees.DbExpression source, Func<System.Data.Entity.Core.Common.CommandTrees.DbExpression,TProjection> projection);

static member Select : System.Data.Entity.Core.Common.CommandTrees.DbExpression * Func<System.Data.Entity.Core.Common.CommandTrees.DbExpression, 'Projection> -> System.Data.Entity.Core.Common.CommandTrees.DbProjectExpression

<Extension()>
Public Function Select(Of TProjection) (source As DbExpression, projection As Func(Of DbExpression, TProjection)) As DbProjectExpression

Type Parameters

TProjection

The method result type of projection.

Parameters

source: DbExpression

An expression that specifies the input set.

projection: Func<DbExpression,TProjection>

A method that specifies how to derive the projected expression given a member of the input set. This method must produce an instance of a type that is compatible with Select and can be resolved into a DbExpression . Compatibility requirements for TProjection are described in remarks.

Returns

DbProjectExpression

A new DbProjectExpression that represents the select operation.

Exceptions

ArgumentNullException

The result of projection is null.

Applies to