Method CountDocumentsAsync

Namespace

MongoDB.Driver

Assembly

MongoDB.Driver.dll

CountDocumentsAsync<TDocument>(IMongoCollection<TDocument>, Expression<Func<TDocument, bool>>, CountOptions, CancellationToken)

Counts the number of documents in the collection. For a fast estimate of the total documents in a collection see EstimatedDocumentCountAsync(EstimatedDocumentCountOptions, CancellationToken).

public static Task<long> CountDocumentsAsync<TDocument>(this IMongoCollection<TDocument> collection, Expression<Func<TDocument, bool>> filter, CountOptions options = null, CancellationToken cancellationToken = default)

Parameters

collection IMongoCollection<TDocument>

The collection.

filter Expression<Func<TDocument, bool>>

The filter.

options CountOptions

The options.

cancellationToken CancellationToken

The cancellation token.

Returns

Task<long>

The number of documents in the collection.

Type Parameters

TDocument

The type of the document.

CountDocumentsAsync<TDocument>(IMongoCollection<TDocument>, IClientSessionHandle, Expression<Func<TDocument, bool>>, CountOptions, CancellationToken)

Counts the number of documents in the collection. For a fast estimate of the total documents in a collection see EstimatedDocumentCountAsync(EstimatedDocumentCountOptions, CancellationToken).

public static Task<long> CountDocumentsAsync<TDocument>(this IMongoCollection<TDocument> collection, IClientSessionHandle session, Expression<Func<TDocument, bool>> filter, CountOptions options = null, CancellationToken cancellationToken = default)

Parameters

collection IMongoCollection<TDocument>

The collection.

session IClientSessionHandle

The session.

filter Expression<Func<TDocument, bool>>

The filter.

options CountOptions

The options.

cancellationToken CancellationToken

The cancellation token.

Returns

Task<long>

The number of documents in the collection.

Type Parameters

TDocument

The type of the document.