MongoQueryable.SumAsync(TSource) Method (IMongoQueryable(TSource), Expression(Func(TSource, Decimal)), CancellationToken) (original) (raw)
MongoQueryableSumAsyncTSource Method (IMongoQueryableTSource, ExpressionFuncTSource, Decimal, CancellationToken)
Computes the sum of the sequence of Decimal values that is obtained by invoking a projection function on each element of the input sequence.
Namespace: MongoDB.Driver.Linq
Assembly: MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.10.0+569905ff5e778c38ea19d9d0392496a83e1704ed
Syntax
public static Task SumAsync( this IMongoQueryable source, Expression<Func<TSource, decimal>> selector, CancellationToken cancellationToken = null )
Public Shared Function SumAsync(Of TSource) ( source As IMongoQueryable(Of TSource), selector As Expression(Of Func(Of TSource, Decimal)), Optional cancellationToken As CancellationToken = Nothing ) As Task(Of Decimal)[] static member SumAsync : source : IMongoQueryable<'TSource> * selector : Expression<Func<'TSource, decimal>> * ?cancellationToken : CancellationToken (* Defaults: let _cancellationToken = defaultArg cancellationToken null *) -> Task
Parameters
source
Type: MongoDB.Driver.LinqIMongoQueryableTSource
A sequence of values.
selector
Type: System.Linq.ExpressionsExpressionFuncTSource, Decimal
A projection function to apply to each element.
cancellationToken (Optional)
Type: System.ThreadingCancellationToken
The cancellation token.
Type Parameters
TSource
The type of the elements of source.
Return Value
Type: TaskDecimal
The sum of the projected values.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type IMongoQueryableTSource. 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