Method CountAsync

Namespace

MongoDB.Driver

Assembly

MongoDB.Driver.dll

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

Counts the number of documents in the collection.

[Obsolete("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")]
public static Task<long> CountAsync<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.

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

Counts the number of documents in the collection.

[Obsolete("Use CountDocumentsAsync or EstimatedDocumentCountAsync instead.")]
public static Task<long> CountAsync<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.