Class EnumerableSelectorAggregateFunction

Represents an AggregateFunction that uses aggregate extension methods provided in System.Linq.Enumerable using SourceField as a member selector.

Inheritance
System.Object
AggregateFunction
EnumerableAggregateFunctionBase
EnumerableSelectorAggregateFunction
DateTimeAverageFunction
DateTimeMaxFunction
DateTimeMinFunction
KeepExtremesFunction
ChartAggregateFunction
AverageFunction
MaxFunction
MinFunction
SumFunction
Inherited Members
Namespace: Telerik.Windows.Data
Assembly: Telerik.Windows.Data.dll

Syntax

public abstract class EnumerableSelectorAggregateFunction : EnumerableAggregateFunctionBase, INotifyPropertyChanged

Constructors

EnumerableSelectorAggregateFunction()

Declaration
protected EnumerableSelectorAggregateFunction()

Properties

SourceField

Gets or sets the name of the field, of the item from the set of items, which value is used as the argument of the aggregate function.

Declaration
public virtual string SourceField { get; set; }
Property Value
System.String

The name of the field to get the argument value from.

SourceFieldType

Gets or sets the type of the member that is used as the argument of the aggregate function. Set this property if the member type cannot be resolved automatically. Such cases are: items with ICustomTypeDescriptor, XmlNode or DataRow.

Declaration
public Type SourceFieldType { get; set; }
Property Value
System.Type

The type of the member used as the argument of the aggregate function.

Methods

CreateAggregateExpression(Expression)

Creates the aggregate expression that is used for constructing expression tree that will calculate the aggregate result.

Declaration
public override Expression CreateAggregateExpression(Expression enumerableExpression)
Parameters
System.Linq.Expressions.Expression enumerableExpression

The grouping expression.
Returns
System.Linq.Expressions.Expression

Overrides

GenerateFunctionName()

Generates default name for this function using this type's name.

Declaration
protected override string GenerateFunctionName()
Returns
System.String

Function name generated with the following pattern: {System.Object.GetType.System.Reflection.MemberInfo.Name}_{System.Object.GetHashCode}.
Overrides

GetAggregationValue(Object)

Declaration
protected object GetAggregationValue(object item)
Parameters
System.Object item

Returns
System.Object

Extension Methods