Retrieving a DataRow from a Data Item

The following example demonstrates how to retrieve a DataRow (container) for a data item using the GetContainerFromItem method. It is important to remember that data rows are virtualized; therefore, references to them or their cells should never be kept.

VB.NET	Copy Code
Public Sub New() InitializeComponent() Dim grid As New DataGridControl() Dim view As New DataGridCollectionView( App.Orders.DefaultView ) grid.ItemsSource = view ' Subscribe to the PropertyChanged event to know when the CurrentItem property changes. AddHandler grid.PropertyChanged, AddressOf grid_PropertyChanged Me.Content = grid End Sub Private Sub grid_PropertyChanged( ByVal sender As Object, _ ByVal e As System.ComponentModel.PropertyChangedEventArgs ) If e.PropertyName = "CurrentItem" Then ' Retrieve the data-row container for the current item. Can be Nothing if the data item ' is not in the viewport. Dim grid As DataGridControl = CType( sender, DataGridControl ) Dim row As Xceed.Wpf.DataGrid.DataRow = TryCast( grid.GetContainerFromItem( grid.CurrentItem ), Xceed.Wpf.DataGrid.DataRow ) ' Change the background of the data row to pink. Data rows are recycled once they ' exit the viewport; therefore, any modifications made to a data row will ' be discarded once it is no longer in the viewport. row.Background = Brushes.Pink End If End Sub

VB.NET

Copy Code

Public Sub New()

  InitializeComponent()

  Dim grid As New DataGridControl()

  Dim view As New DataGridCollectionView( App.Orders.DefaultView )

  grid.ItemsSource = view

  ' Subscribe to the PropertyChanged event to know when the CurrentItem property changes.

  AddHandler grid.PropertyChanged, AddressOf grid_PropertyChanged

  Me.Content = grid

End Sub

Private Sub grid_PropertyChanged( ByVal sender As Object, _

                                 ByVal e As System.ComponentModel.PropertyChangedEventArgs )

  If e.PropertyName = "CurrentItem" Then

    ' Retrieve the data-row container for the current item. Can be Nothing if the data item

    ' is not in the viewport.

    Dim grid As DataGridControl = CType( sender, DataGridControl )

    Dim row As Xceed.Wpf.DataGrid.DataRow = TryCast( grid.GetContainerFromItem( grid.CurrentItem ), Xceed.Wpf.DataGrid.DataRow )

    ' Change the background of the data row to pink. Data rows are recycled once they

    ' exit the viewport; therefore, any modifications made to a data row will

    ' be discarded once it is no longer in the viewport.

    row.Background = Brushes.Pink

  End If

End Sub

C#	Copy Code
public Window1() { InitializeComponent(); DataGridControl grid = new DataGridControl(); DataGridCollectionView view = new DataGridCollectionView( App.Orders.DefaultView ); grid.ItemsSource = view; // Subscribe to the PropertyChanged event to know when the CurrentItem property changes. grid.PropertyChanged += new System.ComponentModel.PropertyChangedEventHandler( grid_PropertyChanged ); this.Content = grid; } void grid_PropertyChanged( object sender, System.ComponentModel.PropertyChangedEventArgs e ) { if( e.PropertyName == "CurrentItem" ) { // Retrieve the data-row container for the current item. Can be null if the data item // is not in the viewport. DataGridControl grid = sender as DataGridControl; Xceed.Wpf.DataGrid.DataRow row = grid.GetContainerFromItem( grid.CurrentItem ) as Xceed.Wpf.DataGrid.DataRow; // Change the background of the data row to pink. Data rows are recycled once they // exit the viewport; therefore, any modifications made to a data row will // be discarded once it is no longer in the viewport. row.Background = Brushes.Pink; } }

Copy Code

public Window1()

{

  InitializeComponent();

  DataGridControl grid = new DataGridControl();   

    

  DataGridCollectionView view = new DataGridCollectionView( App.Orders.DefaultView );

  grid.ItemsSource = view;

  // Subscribe to the PropertyChanged event to know when the CurrentItem property changes.

  grid.PropertyChanged +=

        new System.ComponentModel.PropertyChangedEventHandler( grid_PropertyChanged );    

    

  this.Content = grid;

}

void grid_PropertyChanged( object sender, System.ComponentModel.PropertyChangedEventArgs e )

{

  if( e.PropertyName == "CurrentItem" )

  {

    // Retrieve the data-row container for the current item. Can be null if the data item

    // is not in the viewport.

    DataGridControl grid = sender as DataGridControl;

    Xceed.Wpf.DataGrid.DataRow row = grid.GetContainerFromItem( grid.CurrentItem ) as Xceed.Wpf.DataGrid.DataRow;

    // Change the background of the data row to pink. Data rows are recycled once they

    // exit the viewport; therefore, any modifications made to a data row will

    // be discarded once it is no longer in the viewport.

    row.Background = Brushes.Pink;

  }

}