Class RadItemVirtualizationCollection

A specialized collection for RadItem objects that supports virtualization for performance optimization in large datasets.

Inheritance
System.Object
System.Collections.CollectionBase
RadItemCollection
RadItemVirtualizationCollection
Inherited Members
System.Collections.CollectionBase.Clear()
System.Collections.CollectionBase.RemoveAt(System.Int32)
System.Collections.CollectionBase.System.Collections.ICollection.CopyTo(System.Array, System.Int32)
System.Collections.CollectionBase.System.Collections.IList.get_Item(System.Int32)
System.Collections.CollectionBase.System.Collections.IList.set_Item(System.Int32, System.Object)
System.Collections.CollectionBase.System.Collections.IList.Contains(System.Object)
System.Collections.CollectionBase.System.Collections.IList.Add(System.Object)
System.Collections.CollectionBase.System.Collections.IList.Remove(System.Object)
System.Collections.CollectionBase.System.Collections.IList.IndexOf(System.Object)
System.Collections.CollectionBase.System.Collections.IList.Insert(System.Int32, System.Object)
System.Collections.CollectionBase.OnInsert(System.Int32, System.Object)
System.Collections.CollectionBase.InnerList
System.Collections.CollectionBase.List
System.Collections.CollectionBase.Capacity
System.Collections.CollectionBase.Count
System.Collections.CollectionBase.System.Collections.IList.IsReadOnly
System.Collections.CollectionBase.System.Collections.IList.IsFixedSize
System.Collections.CollectionBase.System.Collections.ICollection.IsSynchronized
System.Collections.CollectionBase.System.Collections.ICollection.SyncRoot
System.Collections.CollectionBase.System.Collections.IList.Item[System.Int32]
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: Telerik.WinControls
Assembly: Telerik.WinControls.dll

Syntax

public class RadItemVirtualizationCollection : RadItemCollection, IList, ICollection, IEnumerable<RadItem>, IEnumerable, IVirtualizationCollection
Remarks

This collection integrates with IVirtualViewport to provide virtualization capabilities, allowing UI controls to efficiently handle large numbers of items by only creating visual elements for items currently in view. The collection automatically notifies the viewport about data changes to maintain virtualization state.

Constructors

RadItemVirtualizationCollection()

Initializes a new instance of the RadItemVirtualizationCollection class.

Declaration
public RadItemVirtualizationCollection()

RadItemVirtualizationCollection(IVirtualViewport)

Initializes a new instance of the RadItemVirtualizationCollection class with the specified viewport.

Declaration
public RadItemVirtualizationCollection(IVirtualViewport ownerViewport)
Parameters
IVirtualViewport ownerViewport

The virtual viewport that will manage virtualization for this collection.

Properties

OwnerViewport

Gets or sets the virtual viewport that manages the virtualization behavior for this collection.

Declaration
public IVirtualViewport OwnerViewport { get; set; }
Property Value
IVirtualViewport

The IVirtualViewport instance that handles virtualization operations.
Remarks

The viewport is responsible for determining which items are visible and need to be realized, and manages the virtualization lifecycle for performance optimization.

Methods

GetVirtualData(Int32)

Gets the virtual data at the specified index.

Declaration
public object GetVirtualData(int index)
Parameters
System.Int32 index

The zero-based index of the data to retrieve.
Returns
System.Object

The data at the specified index, or null if the index is out of range.
Implements

IndexOf(Object)

Determines the index of a specific data item in the collection.

Declaration
public int IndexOf(object data)
Parameters
System.Object data

The data item to locate in the collection.
Returns
System.Int32

The zero-based index of the item if found; otherwise, -1.
Implements

OnClear()

Declaration
protected override void OnClear()
Overrides

OnClearComplete()

Declaration
protected override void OnClearComplete()
Overrides

OnInsertComplete(Int32, Object)

Declaration
protected override void OnInsertComplete(int index, object value)
Parameters
System.Int32 index

System.Object value

Overrides

OnRemoveComplete(Int32, Object)

Declaration
protected override void OnRemoveComplete(int index, object value)
Parameters
System.Int32 index

System.Object value

Overrides

OnSetComplete(Int32, Object, Object)

Declaration
protected override void OnSetComplete(int index, object oldValue, object newValue)
Parameters
System.Int32 index

System.Object oldValue

System.Object newValue

Overrides

OnSort()

Declaration
protected override void OnSort()
Overrides

OnSortComplete()

Declaration
protected override void OnSortComplete()
Overrides

Extension Methods