MongoQueryable.AverageAsync<TSource> Method (IMongoQueryable<TSource>, Expression<Func<TSource, Nullable<Single>>>, CancellationToken) |
Computes the average of the sequence of
Nullable<T> 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: 2.19.1+3a2a09dd959482f665ffbb5df2557ec541597af4
Syntax public static Task<float?> AverageAsync<TSource>(
this IMongoQueryable<TSource> source,
Expression<Func<TSource, float?>> selector,
CancellationToken cancellationToken = default
)
<ExtensionAttribute>
Public Shared Function AverageAsync(Of TSource) (
source As IMongoQueryable(Of TSource),
selector As Expression(Of Func(Of TSource, Single?)),
Optional cancellationToken As CancellationToken = Nothing
) As Task(Of Single?)
[<ExtensionAttribute>]
static member AverageAsync :
source : IMongoQueryable<'TSource> *
selector : Expression<Func<'TSource, Nullable<float32>>> *
?cancellationToken : CancellationToken
(* Defaults:
let _cancellationToken = defaultArg cancellationToken new CancellationToken()
*)
-> Task<Nullable<float32>>
Parameters
- source
- Type: MongoDB.Driver.Linq.IMongoQueryable<TSource>
A sequence of values. - selector
- Type: System.Linq.Expressions.Expression<Func<TSource, Nullable<Single>>>
A projection function to apply to each element. - cancellationToken (Optional)
- Type: System.Threading.CancellationToken
The cancellation token.
Type Parameters
- TSource
- The type of the elements of source.
Return Value
Type:
Task<Nullable<Single>>
The average 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
IMongoQueryable<TSource>. 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