Method CountDocuments
CountDocuments<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 EstimatedDocumentCount(EstimatedDocumentCountOptions, CancellationToken).
public static long CountDocuments<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
CountOptionsThe options.
cancellationToken
CancellationTokenThe cancellation token.
Returns
- long
The number of documents in the collection.
Type Parameters
TDocument
The type of the document.
CountDocuments<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 EstimatedDocumentCount(EstimatedDocumentCountOptions, CancellationToken).
public static long CountDocuments<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
IClientSessionHandleThe session.
filter
Expression<Func<TDocument, bool>>The filter.
options
CountOptionsThe options.
cancellationToken
CancellationTokenThe cancellation token.
Returns
- long
The number of documents in the collection.
Type Parameters
TDocument
The type of the document.