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FirstFunction

Class

Represents a function that returns the first item from a set of items.

Definition

Namespace:Telerik.Windows.Data

Assembly:Telerik.Windows.Data.dll

Syntax:

public class FirstFunction : EnumerableAggregateFunction, INotifyPropertyChanged

Inheritance: objectAggregateFunctionEnumerableAggregateFunctionBaseEnumerableAggregateFunctionFirstFunction

Implements: INotifyPropertyChanged

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

Constructors

FirstFunction()

Initializes a new instance of the FirstFunction class.

public FirstFunction()

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 First 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)