DbExpressionBuilder.Exists(DbExpression) Method

Reference

Definition

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

Assembly:: System.Data.Entity.dll

Important

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Creates a new DbExpression that determines whether the specified set argument is non-empty.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbExpression ^ Exists(System::Data::Common::CommandTrees::DbExpression ^ argument);

public static System.Data.Common.CommandTrees.DbExpression Exists (this System.Data.Common.CommandTrees.DbExpression argument);

static member Exists : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbExpression

<Extension()>
Public Function Exists (argument As DbExpression) As DbExpression

Parameters

argument: DbExpression

An expression that specifies the input set.

Returns

DbExpression

A new DbNotExpression applied to a new DbIsEmptyExpression with the specified argument.

Exceptions

ArgumentNullException

argument is null.

ArgumentException

argument does not have a collection result type.

Applies to