QueryBuilderTDocumentExistsTMember 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: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4

Syntax

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

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

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

QueryBuilderTDocument Class

MongoDB.Driver.Builders Namespace