IAsyncCursorSourceExtensions.FirstOrDefaultAsync(TDocument) Method

IAsyncCursorSourceExtensions.FirstOrDefaultAsync<TDocument> Method

Returns the first document of a cursor returned by a cursor source, or a default value if the cursor contains no documents.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver.Core (in MongoDB.Driver.Core.dll) Version: 2.4.1

Syntax

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public static Task<TDocument> FirstOrDefaultAsync<TDocument>(
	this IAsyncCursorSource<TDocument> source,
	CancellationToken cancellationToken = null
)

<ExtensionAttribute>
Public Shared Function FirstOrDefaultAsync(Of TDocument) ( 
	source As IAsyncCursorSource(Of TDocument),
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of TDocument)

[<ExtensionAttribute>]
static member FirstOrDefaultAsync : 
        source : IAsyncCursorSource<'TDocument> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken null
*)
-> Task<'TDocument>

Parameters

source: Type: MongoDB.Driver.IAsyncCursorSource<TDocument>
The source.
cancellationToken (Optional): Type: Extension Methods (C# Programming Guide).

Reference

IAsyncCursorSourceExtensions Class

MongoDB.Driver Namespace