0 out of 1 rated this helpful - Rate this topic

Queryable.Sum Method (IQueryable<Decimal>)

Computes the sum of a sequence of Decimal values.

Namespace:  System.Linq
Assembly:  System.Core (in System.Core.dll)
public static decimal Sum(
	this IQueryable<decimal> source
)

Parameters

source
Type: System.Linq.IQueryable<Decimal>

A sequence of Decimal values to calculate the sum of.

Return Value

Type: System.Decimal
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 IQueryable<Decimal>. 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).
ExceptionCondition
ArgumentNullException

source is null.

OverflowException

The sum is larger than MaxValue.

The Sum(IQueryable<Decimal>) method generates a MethodCallExpression that represents calling Sum(IQueryable<Decimal>) itself as a constructed generic method. It then passes the MethodCallExpression to the Execute<TResult>(Expression) method of the IQueryProvider represented by the Provider property of the source parameter.

The query behavior that occurs as a result of executing an expression tree that represents calling Sum(IQueryable<Decimal>) depends on the implementation of the type of the source parameter. The expected behavior is that it returns the sum of the values in source.

The following code example demonstrates how to use Sum(IQueryable<Single>) to sum the values of a sequence.

NoteNote

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, substitute the elements of the source sequence with elements of the appropriate numerical type.

            List<float> numbers = new List<float> { 43.68F, 1.25F, 583.7F, 6.5F };

            float sum = numbers.AsQueryable().Sum();

            Console.WriteLine("The sum of the numbers is {0}.", sum);

            /*
                This code produces the following output:

                The sum of the numbers is 635.13.
            */

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Did you find this helpful?
(1500 characters remaining)
Thank you for your feedback
Show:
© 2014 Microsoft. All rights reserved.