Class VirtualizingCollectionView

Represents a view for grouping, sorting, filtering, and navigating a data collection in on-demand.

Inheritance
System.Object
CollectionViewAdv
QueryableCollectionView
VirtualizingCollectionView
GridVirtualizingCollectionView
Implements
System.ComponentModel.ICollectionView
System.Collections.IEnumerable
System.Collections.Specialized.INotifyCollectionChanged
System.ComponentModel.INotifyPropertyChanged
System.IDisposable
System.ComponentModel.IEditableCollectionView
Inherited Members
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: Syncfusion.Data
Assembly: Syncfusion.Data.WPF.dll
Syntax
public class VirtualizingCollectionView : QueryableCollectionView, ICollectionViewAdv, ICollectionView, IEnumerable, INotifyCollectionChanged, INotifyPropertyChanged, ISupportInitialize, IDisposable, IPropertyChangedEventHandler, IEditableCollectionView, ISupportIncrementalLoading, IUnboundExpressionFunc, IGridViewNotifier, IFilterExt, IParallelizableView

Constructors

VirtualizingCollectionView()

Declaration
public VirtualizingCollectionView()

VirtualizingCollectionView(IEnumerable)

Declaration
public VirtualizingCollectionView(IEnumerable source)
Parameters
Type Name Description
System.Collections.IEnumerable source

Properties

RecordDictionary

Declaration
[Obsolete]
public Dictionary<int, RecordEntry> RecordDictionary { get; }
Property Value
Type Description
System.Collections.Generic.Dictionary<System.Int32, RecordEntry>

Methods

ApplyFilter(Predicate<Object>)

Applies filter based on specified RowFilter.

Declaration
protected virtual void ApplyFilter(Predicate<object> rowFilter)
Parameters
Type Name Description
System.Predicate<System.Object> rowFilter

Specifies the RowFilter to apply filter on collection

CreateRecords()

Declaration
protected override sealed RecordsList CreateRecords()
Returns
Type Description
RecordsList
Overrides

CreateRowFilterPredicate()

Declaration
protected override void CreateRowFilterPredicate()
Overrides

CreateTopLevelGroup()

Declaration
protected override TopLevelGroup CreateTopLevelGroup()
Returns
Type Description
TopLevelGroup
Overrides

GetGroupedSource(String[])

Gets the grouped result by specified properties.

Declaration
protected virtual IEnumerable<GroupResult> GetGroupedSource(string[] groupBy)
Parameters
Type Name Description
System.String[] groupBy

Specifies the properties to get the group result on collection
Returns
Type Description
System.Collections.Generic.IEnumerable<GroupResult>

Returns the collection of GroupResult.

GetGroupResult(String[])

Declaration
protected override sealed IEnumerable<GroupResult> GetGroupResult(string[] groupBy)
Parameters
Type Name Description
System.String[] groupBy
Returns
Type Description
System.Collections.Generic.IEnumerable<GroupResult>
Overrides

GetIndexOf(Object)

Gets the index at which the specified item is located.

Declaration
protected virtual int GetIndexOf(object item)
Parameters
Type Name Description
System.Object item

Specifies the item to get the index
Returns
Type Description
System.Int32

Returns the index at which the specified item is located

GetItemProperties()

Declaration
public override PropertyDescriptorCollection GetItemProperties()
Returns
Type Description
System.ComponentModel.PropertyDescriptorCollection
Overrides

GetSourceList()

Gets the SourceCollection to load items source in FilterPop-up control.

Declaration
public virtual IEnumerable GetSourceList()
Returns
Type Description
System.Collections.IEnumerable

Returns the source that were in view. Used in GridFilterControl. Other CollectionViewAdv returns source from CollectionViewAdv.Records.

GetViewRecordCount()

Gets the records count that are inview.

Declaration
[Obsolete]
public virtual int GetViewRecordCount()
Returns
Type Description
System.Int32

Returns the records count that are inview.

IndexOf(Object)

Declaration
public override int IndexOf(object item)
Parameters
Type Name Description
System.Object item
Returns
Type Description
System.Int32
Overrides

OnSortDescriptionChanged(NotifyCollectionChangedEventArgs)

Declaration
protected override sealed void OnSortDescriptionChanged(NotifyCollectionChangedEventArgs e)
Parameters
Type Name Description
System.Collections.Specialized.NotifyCollectionChangedEventArgs e
Overrides

ProcessSort(SortDescriptionCollection)

Sorts the elements in the collection based on specified sort description.

Declaration
protected virtual void ProcessSort(SortDescriptionCollection sortDescription)
Parameters
Type Name Description
System.ComponentModel.SortDescriptionCollection sortDescription

Specifies the sort description to sort the collection

RefreshGroupAfterFiltering(List<Group>)

Declaration
[Obsolete]
protected void RefreshGroupAfterFiltering(List<Group> groups)
Parameters
Type Name Description
System.Collections.Generic.List<Group> groups

RefreshSort()

Declaration
protected override sealed void RefreshSort()
Overrides

ResetFilter()

Declaration
protected override void ResetFilter()
Overrides

SetSource(IEnumerable)

Declaration
protected override void SetSource(IEnumerable _source)
Parameters
Type Name Description
System.Collections.IEnumerable _source
Overrides

Implements

System.ComponentModel.ICollectionView
System.Collections.IEnumerable
System.Collections.Specialized.INotifyCollectionChanged
System.ComponentModel.INotifyPropertyChanged
System.IDisposable
System.ComponentModel.IEditableCollectionView

Extension Methods