IAsyncCursorSourceExtensionsSingleTDocument Method

Returns the only document of a cursor returned by a cursor source. This method throws an exception if the cursor does not contain exactly one document.

Namespace: MongoDB.Driver
Assembly: MongoDB.Driver.Core (in MongoDB.Driver.Core.dll) Version: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4

Syntax

Copy

public static TDocument Single<TDocument>(
	this IAsyncCursorSource<TDocument> source,
	CancellationToken cancellationToken = default
)

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

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

Parameters

source: Type: MongoDB.DriverIAsyncCursorSourceTDocument
The source.
cancellationToken (Optional): Type: System.ThreadingCancellationToken
The cancellation token.

Type Parameters

TDocument: The type of the document.

Return Value

Type: TDocument
The only document of a cursor.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncCursorSourceTDocument. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

IAsyncCursorSourceExtensions Class