Click or drag to resize

ISetWindowFieldsPartitionExtensionsSumTInput Method (ISetWindowFieldsPartitionTInput, FuncTInput, NullableInt32, SetWindowFieldsWindow)

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

Namespace:  MongoDB.Driver.Linq
Assembly:  MongoDB.Driver (in MongoDB.Driver.dll) Version: 2.17.0+b316340e6cc3a8bfc8638dc31b54fbbfe41bfcb2
Syntax
public static long? Sum<TInput>(
	this ISetWindowFieldsPartition<TInput> partition,
	Func<TInput, int?> selector,
	SetWindowFieldsWindow window = null
)

Parameters

partition
Type: MongoDB.DriverISetWindowFieldsPartitionTInput
The partition.
selector
Type: SystemFuncTInput, NullableInt32
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: NullableInt64
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