SelectedItems Property (DataGridControl)

Gets a collection of the data items that are currently selected in the grid.

Syntax

Visual Basic
C#

'Declaration
 
Public ReadOnly Property SelectedItems As IList

'Usage
 
Dim instance As DataGridControl
Dim value As IList
 
value = instance.SelectedItems

public IList SelectedItems {get;}

Property Value

A reference to a collection containing the data items currently selected in the grid. Can be a null reference (Nothing in Visual Basic) if items other than master data items are selected.

Remarks

The SelectedItems, SelectedItem, and SelectedIndex properties represent data items and not DataRows.

In the case where more than 1 data item is selected in a grid, the SelectedItem property will return the first data item in the SelectedItems collection and the SelectedIndex property will return the index of this same item.

The CurrentItem and SelectedItem/SelectedItems properties must be set to a null reference (Nothing in Visual Basic) in order to reset them when the NavigationBehavior property is set to None.

The SelectionChanged and SelectionChanging events can be handled to be notified when the selection has changed or is about to be changed, respectively.

Example

All examples in this topic assume that the grid is bound to the Orders table of the Northwind database, unless stated otherwise.

The following example demonstrates how to delete the selected items from the underlying data view when the delete key is pressed via the PreviewKeyDown event.

XAML
Visual Basic
C#

<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
  <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                    Source="{Binding Source={x:Static Application.Current},
                                                      Path=Orders}"/>       
        
  </Grid.Resources>

 <xcdg:DataGridControl x:Name="OrdersGrid"
                       ItemsSource="{Binding Source={StaticResource cvs_orders}}"
                       PreviewKeyDown="DeleteSelectedRows">
 </xcdg:DataGridControl>
</Grid>

Private Sub DeleteSelectedRows(ByVal sender As Object, ByVal e As KeyEventArgs)
  Dim grid As DataGridControl = TryCast( sender, DataGridControl )
  If Not grid Is Nothing Then
    If e.Key = Key.Delete Then
      If grid.SelectedItems.Count > 0 Then
        ' we keep a copy of the selected items because once the first item is deleted,
        ' the selected items are reset to 0.
        Dim items As ArrayList = New ArrayList( grid.SelectedItems )
        Dim dataView As DataView = TryCast( ( CType( grid.ItemsSource, _
                       DataGridCollectionView ) ).SourceCollection, DataView )
        For i As Integer = items.Count - 1 To 0 Step -1
          dataView.Table.Rows.Remove( CType( items( i ), System.Data.DataRow ) )
        Next i
        grid.CurrentItem = grid.Items( 0 )
      End If
    End If
  End If
End Sub

Private void DeleteSelectedRows( Object sender, KeyEventArgs e )
{
 DataGridControl grid = sender As DataGridControl;      
 If( grid != null )
 {
   If( e.Key == Key.Delete )
   {
     If( grid.SelectedItems.Count > 0 )
     {
       // we keep a copy of the selected items because once the first item Is deleted,
       // the selected items are reset To 0 And the source may be automatically modified To
       // reflect the New items.
       ArrayList items = New ArrayList( grid.SelectedItems );
       DataView dataView = ( ( DataGridCollectionView )grid.ItemsSource ).SourceCollection As DataView;
       For( int i = items.Count - 1; i >= 0; i-- )
       {
         dataView.Table.Rows.Remove( ( System.Data.DataRow )items[ i ] );
       }
       grid.CurrentItem = grid.Items[ 0 ];
     }
   }
 }
}

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

DataGridControl Class
DataGridControl Members