AbortQueryItems Event (DataGridVirtualizingCollectionView)

In This Topic

Syntax

Raised when a QueryItems event has been raised for a page of data that is no longer needed and whose corresponding AsyncQueryInfo object's EndQuery method has not yet been called, allowing the pending operation to be canceled and preventing useless processing on the data server.

Syntax

Visual Basic
C#

public event EventHandler<QueryItemsEventArgs> AbortQueryItems

'Declaration
 
Public Event AbortQueryItems As EventHandler(Of QueryItemsEventArgs)

'Usage
 
Dim instance As DataGridVirtualizingCollectionView
Dim handler As EventHandler(Of QueryItemsEventArgs)
 
AddHandler instance.AbortQueryItems, handler

Event Data

The event handler receives an argument of type QueryItemsEventArgs containing data related to this event. The following QueryItemsEventArgs properties provide information specific to this event.

Property	Description
AsyncQueryInfo	Gets an AsyncQueryInfo that provides the information necessary to retrieve the next batch of items.
CollectionView	Gets the DataGridVirtualizingCollectionView to which the grid is bound.
GroupPath	Gets a read only collection of DataGridGroupInfo objects, which provide information on the parent groups.
IsAsync	true if the event is asynchronous, otherwise false. By default, true. (Inherited from Xceed.Wpf.DataGrid.AsyncQueryEventArgs)

Remarks

Unlike the QueryItemCount and QueryItems events, which must both be handled, the AbortQueryItems event is not required. If it is not handled, calls to the EndQuery method for blocks of data that are no longer needed will be ignored.

Requirements

Target Platforms: Windows 11, Windows, 10, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DataGridVirtualizingCollectionView Class
DataGridVirtualizingCollectionView Members

Send Feedback

Business Suite

Ultimate Suite

Reference