Enumerable::Sum<TSource> Method (IEnumerable<TSource>^, Func<TSource, Decimal>^)
Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource> [ExtensionAttribute] static Decimal Sum( IEnumerable<TSource>^ source, Func<TSource, Decimal>^ selector )
Parameters
- source
-
Type:
System.Collections.Generic::IEnumerable<TSource>^
A sequence of values that are used to calculate a sum.
- selector
-
Type:
System::Func<TSource, Decimal>^
A transform function to apply to each element.
Type Parameters
- TSource
The type of the elements of source.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or selector is null. |
| OverflowException | The sum is larger than MaxValue. |
This method returns zero if source contains no elements.
You can apply this method to a sequence of arbitrary values if you provide a function, selector, that projects the members of source into a numeric type, specifically Decimal.
In Visual Basic query expression syntax, an Aggregate Into Sum() clause translates to an invocation of Sum.
The following code example demonstrates how to use Sum<TSource>(IEnumerable<TSource>^, Func<TSource, Double>^) to sum the projected values of a sequence.
Note |
|---|
This code example uses an overload of this overloaded method that is different from the specific overload that this topic describes. To extend the example to this topic, change the body of the selector function. |
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
