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Xceed DataGrid for WPF v7.3 Documentation
[Root] / Xceed.Wpf.DataGrid Assembly / Xceed.Wpf.DataGrid Namespace / QueryItemCountEventArgs Class


In This Topic
    QueryItemCountEventArgs Class
    In This Topic
    Provides information on the DataGridVirtualizingCollectionView to which the grid is bound including the number of items that it should contain.
    Syntax
    'Declaration
 
Public Class QueryItemCountEventArgs 
   Inherits AsyncQueryEventArgs
    'Usage
 
Dim instance As QueryItemCountEventArgs
    public class QueryItemCountEventArgs : AsyncQueryEventArgs
    Remarks
    Data virtualization requires that certain "query" events be handled in order for prerequisite information and new items to be provided when necessary. Through the QueryItemCount event, which is raised every time the grid is loaded or refreshed or its state changes (e.g., new sorting or filtering criteria are applied), the total number of records in the underlying data source must be provided, taking into account any filters that are currently applied to the items.
    Inheritance Hierarchy

    System.Object
       System.EventArgs
          Xceed.Wpf.DataGrid.AsyncQueryEventArgs
             Xceed.Wpf.DataGrid.QueryItemCountEventArgs

    Public Properties
     NameDescription
    Public PropertyAsyncQueryInfoGets an AsyncQueryInfo that provides the information necessary to retrieve the next batch of items.  
    Public PropertyCollectionViewGets the DataGridVirtualizingCollectionView to which the grid is bound.  
    Public PropertyGroupPath

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

     
    Public PropertyIsAsynctrue if the event is asynchronous, otherwise false. By default, false. (Inherited from Xceed.Wpf.DataGrid.AsyncQueryEventArgs)
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    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: net20, net35, net40, net403, net45, net451, net452, net46, net461, net462, net463, net47, net471, net472, net48, net481.

    See Also

    Reference

    QueryItemCountEventArgs Members
    Xceed.Wpf.DataGrid Namespace

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