IAsyncCursorSourceExtensionsFirstTDocument Method |
Returns the first document of a cursor returned by a cursor source.
Namespace:
MongoDB.Driver
Assembly:
MongoDB.Driver.Core (in MongoDB.Driver.Core.dll) Version: 2.22.0+75246110ed1247226fcc7f8eb2c54ffab745693e
Syntaxpublic static TDocument First<TDocument>(
this IAsyncCursorSource<TDocument> source,
CancellationToken cancellationToken = default
)
<ExtensionAttribute>
Public Shared Function First(Of TDocument) (
source As IAsyncCursorSource(Of TDocument),
Optional cancellationToken As CancellationToken = Nothing
) As TDocument
[<ExtensionAttribute>]
static member First :
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:
TDocumentThe first document.
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).
See Also