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Xceed Toolkit Plus for WPF v5.1 Documentation
Xceed.Wpf.DataGrid.Toolkit Assembly / Xceed.Wpf.DataGrid Namespace / DataGridVirtualizingCollectionView Class / AbortQueryItems Event


In This Topic
    AbortQueryItems Event (DataGridVirtualizingCollectionView)
    In This Topic
    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
    'Declaration
 

    Public Event AbortQueryItems As EventHandler(Of QueryItemsEventArgs)
    'Usage
 

    Dim instance As DataGridVirtualizingCollectionView
Dim handler As EventHandler(Of QueryItemsEventArgs)
 
AddHandler instance.AbortQueryItems, handler
    public event EventHandler<QueryItemsEventArgs> AbortQueryItems
    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.

    PropertyDescription
    AsyncQueryInfoGets an AsyncQueryInfo that provides the information necessary to retrieve the next batch of items.  
    CollectionViewGets the DataGridVirtualizingCollectionView to which the grid is bound.  
    GroupPath

    Gets a read only collection of DataGridGroupInfo objects, which provide information on the parent groups.

     
    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.
    Supported Frameworks

    .NET: net5.0, net5.0-windows, net6.0, net6.0-macos, net6.0-windows, net7.0, net7.0-macos, net7.0-windows, net8.0, net8.0-browser, net8.0-macos, net8.0-windows, net9.0, net9.0-browser, net9.0-macos, net9.0-windows, net10.0, net10.0-browser, net10.0-macos, net10.0-windows.

    .NET Framework: net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

    See Also

    Reference

    DataGridVirtualizingCollectionView Class
    DataGridVirtualizingCollectionView Members

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