MongoQueryableSumAsync Method (IMongoQueryableNullableInt64, CancellationToken)

Computes the sum of a sequence of NullableT values.

Namespace: MongoDB.Driver.Linq
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.22.0+75246110ed1247226fcc7f8eb2c54ffab745693e

Syntax

Copy

public static Task<long?> SumAsync(
	this IMongoQueryable<long?> source,
	CancellationToken cancellationToken = default
)

<ExtensionAttribute>
Public Shared Function SumAsync ( 
	source As IMongoQueryable(Of Long?),
	Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Long?)

[<ExtensionAttribute>]
static member SumAsync : 
        source : IMongoQueryable<Nullable<int64>> * 
        ?cancellationToken : CancellationToken 
(* Defaults:
        let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<Nullable<int64>>

Parameters

source: Type: MongoDB.Driver.LinqIMongoQueryableNullableInt64
A sequence of values to calculate the sum of.
cancellationToken (Optional): Type: System.ThreadingCancellationToken
The cancellation token.

Return Value

Type: TaskNullableInt64
The sum of the values in the sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IMongoQueryableNullableInt64. 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

MongoQueryable Class

SumAsync Overload

MongoDB.Driver.Linq Namespace