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CountFunction

Class

Represents a function that returns the number of items in a set of items, including nested sets.

Definition

Namespace:Telerik.Windows.Data

Assembly:Telerik.Windows.Data.dll

Syntax:

public class CountFunction : EnumerableAggregateFunction, INotifyPropertyChanged

Inheritance: objectAggregateFunctionEnumerableAggregateFunctionBaseEnumerableAggregateFunctionCountFunction

Implements: INotifyPropertyChanged

Inherited Members EnumerableAggregateFunction.CreateAggregateExpression(Expression)EnumerableAggregateFunctionBase.GenerateFunctionName()EnumerableAggregateFunctionBase.ExtensionMethodsTypeAggregateFunction.OnPropertyChanged(string)AggregateFunction.CaptionAggregateFunction.FunctionNameAggregateFunction.ResultFormatStringAggregateFunction.PropertyChanged...

Constructors

CountFunction()

Initializes a new instance of the CountFunction class.

public CountFunction()

Properties

AggregateMethodName

string

Gets the name of the aggregate method on the ExtensionMethodsType that will be used for aggregation.

protected override string AggregateMethodName { get; }

Property Value:

The name of the aggregate method that will be used.

Overrides: EnumerableAggregateFunctionBase.AggregateMethodName

Remarks:

Gets the the Count method name.

Methods

Merge(object, AggregateResultMergeAction, AggregateResult, QueryableCollectionViewGroup)

object

Merges the specified item into the aggregate result according to the specified action.

public override object Merge(object item, AggregateResultMergeAction mergeAction, AggregateResult originalAggregateResult, QueryableCollectionViewGroup group)

Parameters:itemobject

The item.

mergeActionAggregateResultMergeAction

The action.

originalAggregateResultAggregateResult

The original aggregate result.

groupQueryableCollectionViewGroup

The group which the item is being added to or removed from.

Returns:

object

The new value of the aggregate result.

Overrides: AggregateFunction.Merge(object, AggregateResultMergeAction, AggregateResult, QueryableCollectionViewGroup)