QueryTDocumentExistsTMember Method

Tests that an element of that name does or does not exist (see $exists).

Namespace: MongoDB.Driver.Builders
Assembly: MongoDB.Driver.Legacy (in MongoDB.Driver.Legacy.dll) Version: 2.16.0+eeafbea0921243a5868b81984e1083a07c1f75bc

Syntax

Copy

public static IMongoQuery Exists<TMember>(
	Expression<Func<TDocument, TMember>> memberExpression
)

Public Shared Function Exists(Of TMember) ( 
	memberExpression As Expression(Of Func(Of TDocument, TMember))
) As IMongoQuery

static member Exists : 
        memberExpression : Expression<Func<'TDocument, 'TMember>> -> IMongoQuery

Parameters

memberExpression: Type: System.Linq.ExpressionsExpressionFuncTDocument, TMember
The member expression representing the element to test.

Type Parameters

TMember: The member type.

Return Value

Type: IMongoQuery
An IMongoQuery.

Reference

QueryTDocument Class

MongoDB.Driver.Builders Namespace