Class GroupDescriptor<TElement, TKey, TSortingKey>

Allows grouping by a lambda expression.

Inheritance
System.Object
InheritanceContextPropagator
DescriptorBase
GroupDescriptorBase
AggregatedGroupDescriptorBase
GroupDescriptor<TElement, TKey, TSortingKey>
Inherited Members
Namespace: Telerik.Windows.Data
Assembly: Telerik.Windows.Data.dll

Syntax

public class GroupDescriptor<TElement, TKey, TSortingKey> : AggregatedGroupDescriptorBase, ISuspendNotifications, IGroupDescriptor, INotifyPropertyChanged, IAggregateFunctionsProvider
Type Parameters
TElement

TKey

TSortingKey

Constructors

GroupDescriptor()

Declaration
public GroupDescriptor()

Fields

GroupingExpressionProperty

Identifies the GroupingExpression dependency property.

Declaration
public static readonly DependencyProperty GroupingExpressionProperty
Field Value
System.Windows.DependencyProperty

GroupSortingExpressionProperty

Identifies the GroupSortingExpression dependency property.

Declaration
public static readonly DependencyProperty GroupSortingExpressionProperty
Field Value
System.Windows.DependencyProperty

Properties

GroupingExpression

Gets or sets the grouping predicate.

Declaration
public Expression<Func<TElement, TKey>> GroupingExpression { get; set; }
Property Value
System.Linq.Expressions.Expression<System.Func<TElement, TKey>>

The grouping predicate.

GroupSortingExpression

Gets or sets the grouping and sorting predicate.

Declaration
public Expression<Func<IGrouping<TKey, TElement>, TSortingKey>> GroupSortingExpression { get; set; }
Property Value
System.Linq.Expressions.Expression<System.Func<System.Linq.IGrouping<TKey, TElement>, TSortingKey>>

The grouping and sorting predicate.

Methods

CreateGroupKeyExpression(ParameterExpression)

Creates a group expression that returns the grouping key for each item in a collection.

Declaration
protected override Expression CreateGroupKeyExpression(ParameterExpression parameterExpression)
Parameters
System.Linq.Expressions.ParameterExpression parameterExpression

The parameter expression, which will be used for grouping.
Returns
System.Linq.Expressions.Expression

Expression that creates group key for the given item.
Overrides

CreateGroupSortExpression(Expression)

Creates sorting key expression that sorts the groups created from this descriptor using the group's key.

Declaration
public override Expression CreateGroupSortExpression(Expression groupingExpression)
Parameters
System.Linq.Expressions.Expression groupingExpression

The grouping expression, which represents the grouped items created from the CreateGroupKeyExpression(Expression).
Returns
System.Linq.Expressions.Expression

Expression that represents the sort criteria for each group.
Overrides

Extension Methods