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ISetWindowFieldsPartitionExtensionsSumTInput Method (ISetWindowFieldsPartitionTInput, FuncTInput, NullableDecimal, SetWindowFieldsWindow)

Returns the sum of numeric values. $sum ignores non-numeric values.

Namespace:  MongoDB.Driver.Linq
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.20.0+ee01960089f28ea1b501690df5fc9f6318a70242
Syntax
public static Nullable<decimal> Sum<TInput>(
	this ISetWindowFieldsPartition<TInput> partition,
	Func<TInput, Nullable<decimal>> selector,
	SetWindowFieldsWindow window = null
)

Parameters

partition
Type: MongoDB.DriverISetWindowFieldsPartitionTInput
The partition.
selector
Type: SystemFuncTInput, NullableDecimal
The selector that selects a value from the input document.
window (Optional)
Type: MongoDB.DriverSetWindowFieldsWindow
The window boundaries.

Type Parameters

TInput
The type of the input documents in the partition.

Return Value

Type: NullableDecimal
The sum of the values.

Usage Note

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