Редагувати

Поділитися через


DbExpressionBuilder.Exists(DbExpression) Method

Definition

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

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

Exceptions

argument is null.

argument does not have a collection result type.

Applies to