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GroupBuilder<T>

Class

Used to build groups from indexer

Definition

Namespace:Telerik.WinControls.Data

Assembly:Telerik.WinControls.dll

Type Parameters:

Syntax:

public class GroupBuilder<T> where T : IDataItem

Inheritance: objectGroupBuilder<T>

Derived Classes: GridGroupBuilder

Constructors

GroupBuilder(Index<T>)

public GroupBuilder(Index<T> index)

Parameters:indexIndex<T>

Properties

CollectionView

RadCollectionView<T>

Gets the collection view associated with this builder.

public RadCollectionView<T> CollectionView { get; }

Comparer

IComparer<Group<T>>

public virtual IComparer<Group<T>> Comparer { get; set; }

DefaultGroupPredicate

GroupPredicate<T>

Gets the default group predicate.

public virtual GroupPredicate<T> DefaultGroupPredicate { get; }

Property Value:

The group predicate.

GroupPredicate

GroupPredicate<T>

Gets or sets the group predicate.

public virtual GroupPredicate<T> GroupPredicate { get; set; }

Property Value:

The group predicate.

Groups

GroupCollection<T>

Gets the groups.

public GroupCollection<T> Groups { get; }

Property Value:

The groups.

NeedsRefresh

bool

Gets a value indicating whether [needs refresh].

public bool NeedsRefresh { get; }

Property Value:

true if [needs refresh]; otherwise, false.

Version

int

protected int Version { get; }

Methods

GetGroup(GroupCollection<T>, Group<T>, Group<T>, object, int)

protected virtual Group<T> GetGroup(GroupCollection<T> cache, Group<T> newGroup, Group<T> parent, object key, int level)

Parameters:cacheGroupCollection<T>newGroupGroup<T>parentGroup<T>keyobjectlevelintReturns:

Group<T>

GetItemGroup(T)

public Group<T> GetItemGroup(T item)

Parameters:itemTReturns:

Group<T>

GetItemKey(T, SortDescriptor)

protected virtual object GetItemKey(T item, SortDescriptor descriptor)

Parameters:itemTdescriptorSortDescriptorReturns:

object

Perform(IReadOnlyCollection<T>, int, Group<T>)

Performs the grouping operation for specified items.

public virtual GroupCollection<T> Perform(IReadOnlyCollection<T> items, int level, Group<T> parent)

Parameters:itemsIReadOnlyCollection<T>

The items.

levelint

The level.

parentGroup<T>

The parent.

Returns:

GroupCollection<T>