Xceed Toolkit Plus for WPF v4.6 Documentation
Providing Data
Welcome to Xceed Toolkit Plus for WPF v4.6 > DataGrid, ListBox, Chart, AvalonDock, and PropertyGrid > Datagrid control > Fundamentals > Manipulating Data > Providing Data

The data items that populate a grid are provided by the DataGridCollectionView or DataGridCollectionViewSource (in XAML) assigned to the ItemsSource property of the DataGridControl class. These views allow the data items contained in a grid to be grouped, sorted, and/or filtered (see Example 1).  

In order for the DataGridCollectionViewSource to create a custom view for the data items that will eventually be displayed in a grid, it must be bound to the underlying data source or data items must be provided manually via the SourceItems property. In turn, a grid will be bound to the DataGridCollectionViewSource that contains the customized data-item view (see also Grouping, Sorting, and Filtering).

DataRow objects are the UI representation of data items. They have a limited lifespan and exist only while they are visible in a grid's viewport; this is called virtualization and is the reason that the Items property accesses the data items and not the data rows. The SelectedItem, SelectedItems, and CurrentItem properties of the DataGridControl class also reference data items and not data rows (see Example 3).

Programmatically, when the DataGridCollectionView is bound to a data source, the ItemProperties.Clear method must be called prior to adding DataGridItemProperty objects to the ItemProperties collection to remove items that were automatically added when the DataGridCollectionView was instantiated. Automatic creation of item properties can be disabled by setting the AutoCreateItemProperties property of the DataGridCollectionViewSource to false (by default, true) or by specifying so when creating an instance of the DataGridCollectionView.

Deleting Selected Items

The IsDeleteCommandEnabled property indicates whether the ApplicationCommands.Delete command is enabled. When set to true, all selected items (see GlobalSelectedItems property) will be deleted when the delete key is pressed. The DeletingSelectedItems event, which is raised prior to deleting the items, allows the operation to be canceled by setting the Abort property, which is received in the event arguments, to true. By default, when an error occurs while deleting an item, the item will be skipped and the operation will continue to the next item. By handling the DeletingSelectedItemError event, this behavior can be modified to either abort the entire operation, retry deleting the item that caused the error, or skip the item (see Example 9). Once the items have been deleted, the SelectedItemsDeleted event will be raised to signal the end of the operation.

Examples

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

Example 1: Binding to a data table

This first code example demonstrates how to create a connection to the Access version of the Northwind database and create a property named "Orders" to which the grid will be bound. The code should be placed in the App.xaml.cs file.

VB.NET
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Public Partial Class App
    Inherits Application

    Public Property Data As DataSet
    Public Property Orders As DataTable

    Protected Overrides Sub OnStartup(ByVal e As StartupEventArgs)
        ' Set the licence key
        Xceed.Wpf.DataGrid.Licenser.LicenseKey = "Enter your license key here"
        Data = Xceed.Wpf.DataGrid.Samples.SampleData.DataProvider.GetNorthwindDataSet()
        Orders = Data.Tables("Orders")
        MyBase.OnStartup(e)
    End Sub
End Class
C#
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public partial class App : Application
  {
    public DataSet Data
    {
      get; set;
    }
    public DataTable Orders
    {
      get; set;
    }
    protected override void OnStartup( StartupEventArgs e )
    {
      // Set the licence key
      Xceed.Wpf.DataGrid.Licenser.LicenseKey = "Enter your license key here";
      Data = Xceed.Wpf.DataGrid.Samples.SampleData.DataProvider.GetNorthwindDataSet();
      Orders = Data.Tables[ "Orders" ];
      base.OnStartup( e );
    }
  }

The next example demonstrates how to bind a grid to the Orders table, which is retrieved through the Orders property implemented in the code above.

XAML
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<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}}"/>
</Grid>

Example 2: Binding to an array

The following example demonstrates how to bind a grid to an array defined in the resources of the containing grid.

XAML
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<Grid xmlns:s="clr-namespace:System;assembly=mscorlib"
      xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">                    
  <Grid.Resources>
  <x:Array x:Key="data_list" Type="{x:Type s:String}">
    <s:String>Sunday</s:String>
    <s:String>Monday</s:String>
    <s:String>Tuesday</s:String>
    <s:String>Wednesday</s:String>
    <s:String>Thursday</s:String>
    <s:String>Friday</s:String>
    <s:String>Saturday</s:String>
  </x:Array>
  </Grid.Resources>
  <xcdg:DataGridControl x:Name="OrdersGrid"
                        ItemsSource="{StaticResource data_list}"/>
</Grid>
VB.NET
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Dim data() As New String( 6 )
data( 0 ) = "Sunday"
data( 1 ) = "Monday"
data( 2 ) = "Tuesday"
data( 3 ) = "Wednesday"
data( 4 ) = "Thursday"
data( 5 ) = "Friday"
data( 6 ) = "Saturday"
dataGridControl.ItemsSource = data
C#
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string[] data = new string[ 7 ];
data[ 0 ] = "Sunday";
data[ 1 ] = "Monday";
data[ 2 ] = "Tuesday";
data[ 3 ] = "Wednesday";
data[ 4 ] = "Thursday";
data[ 5 ] = "Friday";
data[ 6 ] = "Saturday";
dataGridControl.ItemsSource = data;

 

Example 3: Retrieving values from the current item

The following example demonstrates how to retrieve the value of the ShipCountry and ShipCity properties of the current item and display them in TextBlocks located above the grid. Note that an item in a grid must be current in order for the information to be displayed.

XAML
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<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>
   <DockPanel>  
      <StackPanel Orientation="Horizontal" DockPanel.Dock="Top">
        <TextBlock Text="{Binding ElementName=OrdersGrid, Path=CurrentItem[ShipCountry]}"/>
        <TextBlock Text=" - "/>
        <TextBlock Text="{Binding ElementName=OrdersGrid, Path=CurrentItem[ShipCity]}"/>
      </StackPanel>   
      <xcdg:DataGridControl x:Name="OrdersGrid"
                            ItemsSource="{Binding Source={StaticResource cvs_orders}}"
                            DockPanel.Dock="Bottom">
      </xcdg:DataGridControl>
   </DockPanel>
</Grid>

Example 4: Providing unbound data

The following example demonstrates how to add Person data to a custom ObservableCollection of Person objects. 

XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
      xmlns:local="clr-namespace:Xceed.Wpf.Documentation"
      xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase">
  <Grid.Resources>
   <local:PersonObservableCollection x:Key="personData">
     <local:Person FirstName="Jenny"
                   LastName="Beland"
                   Occupation="Writer"/>
     <local:Person FirstName="Francois"
                   LastName="Carignan"
                   Occupation="Developer"/>
     <local:Person FirstName="Pascal"
                   LastName="Bourque"
                   Occupation="Developer"/>
     <local:Person FirstName="Michel"
                   LastName="Fortin"
                   Occupation="Developer"/>
     <local:Person FirstName="Marc"
                   LastName="Laroche"
                   Occupation="Developer"/>
     <local:Person FirstName="Pierre-Luc"
                   LastName="Ledoux"
                   Occupation="Developer"/>
     <local:Person FirstName="Mathieu"
                   LastName="Drimonakos"
                   Occupation="TechnicalSupport"/>
     <local:Person FirstName="Catherine"
                   LastName="Sauzede"
                   Occupation="Infograph"/>
   </local:PersonObservableCollection>
   <xcdg:DataGridCollectionViewSource x:Key="cvs_person"
                                      ItemType="{x:Type local:Person}"
                                      Source="{StaticResource personData}">
      <xcdg:DataGridCollectionViewSource.GroupDescriptions>
        <xcdg:DataGridGroupDescription PropertyName="Occupation"/>
      </xcdg:DataGridCollectionViewSource.GroupDescriptions>
      <xcdg:DataGridCollectionViewSource.SortDescriptions>
        <scm:SortDescription PropertyName="Occupation"
                              Direction="Ascending"/>
      </xcdg:DataGridCollectionViewSource.SortDescriptions>
    </xcdg:DataGridCollectionViewSource>
  </Grid.Resources>
 <xcdg:DataGridControl x:Name="PersonGrid"
                       ItemsSource="{Binding Source={StaticResource cvs_person}}"/>
</Grid>
VB.NET
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Dim people As New ObservableCollection( Of Person )()
people.Add( New Person( "Jenny", "Beland" ) )
people.Add( New Person( "Francois", "Carignan" ) )
people.Add( New Person( "Jacques", "Bourque" ) )
people.Add( New Person( "Pascal", "Bourque" ) )
people.Add( New Person( "Marc", "Laroche" ) )
people.Add( New Person( "Pierre-Luc", "Ledoux" ) )
people.Add( New Person( "Catherine", "Sauzede" ) )
people.Add( New Person( "Christian", "Nadeau" ) )
Dim collectionView As New DataGridCollectionView( people, GetType( Person ) )
dataGridControl.ItemsSource = collectionView
C#
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ObservableCollection<Person> people = new ObservableCollection<Person>();
people.Add( new Person( "Jenny", "Beland" ) );
people.Add( new Person( "Francois", "Carignan" ) );
people.Add( new Person( "Jacques", "Bourque" ) );
people.Add( new Person( "Pascal", "Bourque" ) );
people.Add( new Person( "Marc", "Laroche" ) );
people.Add( new Person( "Pierre-Luc", "Ledoux" ) );
people.Add( new Person( "Catherine", "Sauzede" ) );
people.Add( new Person( "Christian", "Nadeau" ) );
DataGridCollectionView collectionView = new DataGridCollectionView( people, typeof( Person ) );
dataGridControl.ItemsSource = collectionView;

Example 5: Binding to a LINQ table

The following example demonstrates how to bind a grid to a LINQ table and submit any modifications made to the data items using the SubmitChanges method. 

This example assumes that a new LINQ to SQL Classes item named Northwind.dbml has been added to the project and that it contains the Orders, Customers, and Shippers tables. The Northwind.designer.cs that is created at the same time represents the NorthwindDataContext and should automatically contain all the relevant members. It also assumes that a property named LinqDataContext that returns a new instance of the NorthwindDataContext exists in the App.xaml.cs code-behind file.

For more information on LINQ, refer to The LINQ Project Web site.

XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
      xmlns:local="clr-namespace:Xceed.Wpf.Documentation">
  <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                       Source="{Binding Source={x:Static Application.Current},
                                                        Path=LinqDataContext.Orders}"/>
    <DataTemplate DataType="{x:Type local:Shipper}">
      <TextBlock Text="{Binding CompanyName}"/>
    </DataTemplate>
    <DataTemplate DataType="{x:Type local:Customer}">
      <TextBlock Text="{Binding CompanyName}"/>
    </DataTemplate>
    <DataTemplate DataType="{x:Type local:Employee}">
      <StackPanel Orientation="Horizontal">
        <TextBlock Text="{Binding FirstName}"/>
        <TextBlock Text=" " />
        <TextBlock Text="{Binding LastName}"/>
      </StackPanel>
    </DataTemplate>
    <xcdg:CellEditor x:Key="employeeEditor">
      <xcdg:CellEditor.EditTemplate>
        <DataTemplate>
          <ComboBox ItemsSource="{Binding Source={x:Static Application.Current},
                                          Path=LinqDataContext.Employees}"
                    SelectedItem="{xcdg:CellEditorBinding}"/>
        </DataTemplate>
      </xcdg:CellEditor.EditTemplate>
    </xcdg:CellEditor>
    <xcdg:CellEditor x:Key="customerEditor">
      <xcdg:CellEditor.EditTemplate>
        <DataTemplate>
          <ComboBox ItemsSource="{Binding Source={x:Static Application.Current},
                                          Path=LinqDataContext.Customers}"
                    SelectedItem="{xcdg:CellEditorBinding}"/>
        </DataTemplate>
      </xcdg:CellEditor.EditTemplate>
    </xcdg:CellEditor>
    <xcdg:CellEditor x:Key="shipperEditor">
      <xcdg:CellEditor.EditTemplate>
        <DataTemplate>
          <ComboBox ItemsSource="{Binding Source={x:Static Application.Current}, Path=LinqDataContext.Shippers}"
                    SelectedItem="{xcdg:CellEditorBinding}"/>
        </DataTemplate>
      </xcdg:CellEditor.EditTemplate>
    </xcdg:CellEditor>
  </Grid.Resources>
  <DockPanel>
    <Button Content="Save Modifications"
            Click="SaveModifications"
            DockPanel.Dock="Top" />
    <xcdg:DataGridControl x:Name="OrdersGrid"
                          ItemsSource="{Binding Source={StaticResource cvs_orders}}">
      <xcdg:DataGridControl.Columns>
        <xcdg:Column FieldName="OrderID"
                     Visible="False"/>
        <xcdg:Column FieldName="EmployeeID"
                     Visible="False"/>
        <xcdg:Column FieldName="Employee"
                     CellEditor="{StaticResource employeeEditor}"/>
        <xcdg:Column FieldName="CustomerID"
                     Visible="False"/>
        <xcdg:Column FieldName="Customer"
                     CellEditor="{StaticResource customerEditor}"
                     Title="Company Name"/>
        <xcdg:Column FieldName="ShipVia"
                     Visible="False"/>
        <xcdg:Column FieldName="Shipper"
                     CellEditor="{StaticResource shipperEditor}"/>
      </xcdg:DataGridControl.Columns>
      <xcdg:DataGridControl.View>
        <xcdg:TableView>
          <xcdg:TableView.FixedFooters>
            <DataTemplate>
              <xcdg:InsertionRow/>
            </DataTemplate>
          </xcdg:TableView.FixedFooters>
        </xcdg:TableView>
      </xcdg:DataGridControl.View>
    </xcdg:DataGridControl>
  </DockPanel>
</Grid>
VB.NET
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Private Sub SaveModifications( sender As Object, e As RoutedEventArgs )
   App.LinqDataContext.SubmitChanges()
End Sub
C#
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private void SaveModifications( object sender, RoutedEventArgs e )
{    
 App.LinqDataContext.SubmitChanges();
}

Example 6: Binding to a LINQ query (SQL)

The following example demonstrates how to bind a grid to an SQL LINQ query and submit any modifications made to the data items using the SubmitChanges method. 

Although existing data items can be modified and the changes committed, it is not possible to insert new data items.

This example assumes that a new LINQ to SQL Classes item named Northwind.dbml has been added to the project and that it contains the Orders, Customers, and Shippers tables. The Northwind.designer.cs that is created at the same time represents the NorthwindDataContext and should automatically contain all the relevant members. It also assumes that a property named OrdersQuery that returns a new new query based on the value selected in the combo box.

The Window1 class implements INotifyPropertyChanged so that the DataGridCollectionViewSource can be notified when the query changes in order to refresh its content.

For more information on LINQ, refer to The LINQ Project Web site.

XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid"
      xmlns:local="clr-namespace:Xceed.Wpf.Documentation">
  <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                      Source="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}},
                                                       Path=OrdersQuery}">
      <xcdg:DataGridCollectionViewSource.GroupDescriptions>
        <xcdg:DataGridGroupDescription PropertyName="Shipper"/>
      </xcdg:DataGridCollectionViewSource.GroupDescriptions>
    </xcdg:DataGridCollectionViewSource>
    <DataTemplate DataType="{x:Type local:Shipper}">
      <TextBlock Text="{Binding CompanyName}"/>
    </DataTemplate>
    <DataTemplate DataType="{x:Type local:Customer}">
      <TextBlock Text="{Binding CompanyName}"/>
    </DataTemplate>
    <DataTemplate DataType="{x:Type local:Employee}">
      <StackPanel Orientation="Horizontal">
        <TextBlock Text="{Binding FirstName}"/>
        <TextBlock Text=" " />
        <TextBlock Text="{Binding LastName}"/>
      </StackPanel>
    </DataTemplate>       
  </Grid.Resources>
  <DockPanel>
    <StackPanel Orientation="Horizontal"
                DockPanel.Dock="Top">
      <Button Content="Save Modifications"
              Click="SaveModifications"/>
      <ComboBox x:Name="ShipperCombo"
                ItemsSource="{Binding Source={x:Static Application.Current}, Path=LinqDataContext.Shippers}"
                SelectionChanged="ShipperSelectionChanged"/>
    </StackPanel>
    <xcdg:DataGridControl x:Name="OrdersGrid"
                          ItemsSource="{Binding Source={StaticResource cvs_orders}}">
      <xcdg:DataGridControl.Columns>
        <xcdg:Column FieldName="Shipper"
                     VisiblePosition="0"/>
        <xcdg:Column FieldName="OrderID"
                     Visible="False"/>
        <xcdg:Column FieldName="EmployeeID"
                     Visible="False"/>
        <xcdg:Column FieldName="CustomerID"
                     Visible="False"/>
        <xcdg:Column FieldName="Customer"
                     Title="Company Name"/>
        <xcdg:Column FieldName="ShipVia"
                     Visible="False"/>
      </xcdg:DataGridControl.Columns>
    </xcdg:DataGridControl>
  </DockPanel>
</Grid>
VB.NET
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Namespace Xceed.Wpf.Documentation
Public Partial Class Window1
    Inherits Window
    Implements INotifyPropertyChanged
    Public Sub New()
      InitializeComponent()
    End Sub
    Private m_query As IEnumerable = Nothing
    Public Property OrdersQuery() As IEnumerable
      Get
        If m_query Is Nothing Then
          m_query = From orders In App.LinqDataContext.Orders _
                    Select orders
        End If
        Return m_query
      End Get
      Set
        m_query = Value
        Me.OnPropertyChanged(New PropertyChangedEventArgs("OrdersQuery"))
      End Set
    End Property
    Private Sub ShipperSelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)
      Me.OrdersQuey = From orders In App.LinqDataContext.Orders _
                 Where orders.Shipper.CompanyName = CTYpe( Me.ShipperCombo.SelectedValue, Shipper).CompanyName _
                 Select orders
    End Sub
    Private Sub SaveModifications(ByVal sender As Object, ByVal e As RoutedEventArgs)
      App.LinqDataContext.SubmitChanges()
    End Sub
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged
    Private Sub OnPropertyChanged(ByVal e As PropertyChangedEventArgs)
      If Me.PropertyChangedEvent Is Nothing Then
        Return
      End If
      RaiseEvent PropertyChanged(Me, e)
    End Sub
  End Class
End Namespace
C#
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namespace Xceed.Wpf.Documentation
{
 public partial class Window1 : Window, INotifyPropertyChanged
 {
   public Window1()
   {
     InitializeComponent();    
   }
   private IEnumerable m_query = null;
   public IEnumerable OrdersQuery
   {
     get
     {
       if( m_query == null )
       {
         m_query = from orders in App.LinqDataContext.Orders
                   select orders;
       }
       return m_query;
     }
     set
     {
       m_query = value;
       this.OnPropertyChanged( new PropertyChangedEventArgs( "OrdersQuery" ) );
     }
   }
   private void ShipperSelectionChanged( object sender, SelectionChangedEventArgs e )
   {
     this.OrdersQuery = from orders in App.LinqDataContext.Orders
                 where orders.Shipper.CompanyName == ( ( Shipper )this.ShipperCombo.SelectedValue ).CompanyName
                 select orders;
   }
   private void SaveModifications( object sender, RoutedEventArgs e )
   {    
     App.LinqDataContext.SubmitChanges();
   }
   public event PropertyChangedEventHandler PropertyChanged;
   private void OnPropertyChanged( PropertyChangedEventArgs e )
   {
     if( this.PropertyChanged == null )
       return;
     this.PropertyChanged( this, e );
   }
 }
}

Example 7: Binding to a LINQ query (XML)

The following example demonstrates how to bind a grid to an XML query on an XDocument that loads the XML version of the Orders table of the Northwind database.

The content of the resulting grid will not be editable.
XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
  <Grid.Resources>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                    Source="{Binding RelativeSource={RelativeSource AncestorType={x:Type Window}},
                                     Path=XmlData}"/>
  </Grid.Resources>
 
  <xcdg:DataGridControl x:Name="OrdersGrid"
                       ItemsSource="{Binding Source={StaticResource cvs_orders}}"/>
</Grid>

The following code provides the implementation for the XmlData property, which returns the query result.

VB.NET
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Public ReadOnly Property XmlData() As IEnumerable
  Get
    Dim document As XDocument = App.NorthwindDocument
    Dim data As IEnumerable = From order In document.Element("dataroot").Descendants("Orders") _
                              Select New With {.ShipCountry = order.Element("ShipCountry").Value, _
                                .ShipCity = order.Element("ShipCity").Value, _
                                .ShipAddress = order.Element("ShipAddress").Value, _
                                .ShipName = order.Element("ShipName").Value, _
                                .Freight = order.Element("Freight").Value}
    Return data
  End Get
End Property
C#
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public IEnumerable XmlData
{
 get
 {
   XDocument document = App.NorthwindDocument;
   IEnumerable data = from order in document.Element( "dataroot" ).Descendants( "Orders" )
                      select new
                      {
                        ShipCountry = order.Element( "ShipCountry" ).Value,
                        ShipCity = order.Element( "ShipCity" ).Value,
                        ShipAddress = order.Element( "ShipAddress" ).Value,
                        ShipName = order.Element( "ShipName" ).Value,
                        ShipVia = order.Element( "ShipVia" ).Value,
                        Freight = order.Element( "Freight" ).Value
                      };
   return data;
 }
}

 

Example 8: Deleting selected items

The following example demonstrates how to delete the selected items and handle the DeletingSelectedItemError and DeletingSelectedItems events.

XAML
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<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}}"
                         IsDeleteCommandEnabled="True"
                         DeletingSelectedItemError="OrdersGrid_DeletingSelectedItemError"
                         DeletingSelectedItems="OrdersGrid_DeletingSelectedItems"/>       
</Grid>
VB.NET
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Private Sub OrdersGrid_DeletingSelectedItemError( ByVal sender As Object, ByVal e As DeletingSelectedItemErrorRoutedEventArgs )
  Dim result As MessageBoxResult = System.Windows.MessageBox.Show( "The following error occurred while attempting to delete an item: " & _
                                            e.Exception.Message & " Do you want to attempt to continue?", "Error", MessageBoxButton.YesNoCancel )
  ' If "No", the item would be skipped. Since "Skip" is the default action,
  ' there is no need to verify it.
  If result = MessageBoxResult.Yes Then
    If Me.OrdersGrid.IsBeingEdited Then
      Try
        Me.OrdersGrid.CancelEdit()
        e.Action = DeletingSelectedItemErrorAction.Retry
      Catch
        e.Action = DeletingSelectedItemErrorAction.Skip
      End Try
    End If
  End If
  If result = MessageBoxResult.Cancel Then
    e.Action = DeletingSelectedItemErrorAction.Abort
  End If
End Sub
Private Sub OrdersGrid_DeletingSelectedItems( ByVal sender As Object, ByVal e As CancelRoutedEventArgs )
  Dim result As MessageBoxResult = System.Windows.MessageBox.Show( "Are you certain you want to delete the selected rows?", _
                                                                 "Confirm Delete", MessageBoxButton.YesNo )
  If result = MessageBoxResult.No Then
    e.Cancel = True
  End If
End Sub
C#
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private void OrdersGrid_DeletingSelectedItemError( object sender, DeletingSelectedItemErrorRoutedEventArgs e )
{    
 MessageBoxResult result = System.Windows.MessageBox.Show( "The following error occurred while attempting to delete an item: " +
                                           e.Exception.Message + " Do you want to attempt to continue?", "Error", MessageBoxButton.YesNoCancel );
 // If "No", the item would be skipped. Since "Skip" is the default action,
 // there is no need to verify it.
 if( result == MessageBoxResult.Yes )
 {
   if( this.OrdersGrid.IsBeingEdited )
   {
     try
     {
       this.OrdersGrid.CancelEdit();
       e.Action = DeletingSelectedItemErrorAction.Retry;
     }
     catch
     {
       e.Action = DeletingSelectedItemErrorAction.Skip;
     }        
   }
 }
 if( result == MessageBoxResult.Cancel )
 {
   e.Action = DeletingSelectedItemErrorAction.Abort;
 }
}
private void OrdersGrid_DeletingSelectedItems( object sender, CancelRoutedEventArgs e )
{
 MessageBoxResult result = System.Windows.MessageBox.Show( "Are you certain you want to delete the selected rows?", "Confirm Delete", MessageBoxButton.YesNo );
 if( result == MessageBoxResult.No )
 {
   e.Cancel = true;
 }     
}
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