DbExpressionBuilder.Exists(DbExpression) Method

Reference

Definition

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

Assembly:: System.Data.Entity.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

مشاركة عبر