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Xceed Toolkit Plus for WPF v5.1 Documentation
Xceed.Wpf.DataGrid.Toolkit Assembly / Xceed.Wpf.DataGrid Namespace / GroupHeaderFooterItem Structure
Example


In This Topic
    GroupHeaderFooterItem Structure
    In This Topic
    Structure that represents a container created from a template in the header or footer sections of a group.
    Syntax
    'Declaration
 

    Public Structure GroupHeaderFooterItem 
   Inherits System.ValueType
    'Usage
 

    Dim instance As GroupHeaderFooterItem
    public struct GroupHeaderFooterItem : System.ValueType
    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 select all the data items contained in a group by adding them to a grid's selected-items collection when a group-header control is pressed. In the case where a group contains child groups, all the data items in the child groups will also be selected.
    <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}">
        <xcdg:DataGridCollectionViewSource.GroupDescriptions>
          <xcdg:DataGridGroupDescription PropertyName="ShipCountry"/>
          <xcdg:DataGridGroupDescription PropertyName="ShipCity"/>
        </xcdg:DataGridCollectionViewSource.GroupDescriptions>
      </xcdg:DataGridCollectionViewSource>
     <Style TargetType="{x:Type xcdg:GroupHeaderControl}">
       <EventSetter Event="PreviewMouseLeftButtonDown"
                    Handler="SelectRows"/>
     </Style>
    </Grid.Resources>
    <xcdg:DataGridControl x:Name="OrdersGrid"
                        ItemsSource="{Binding Source={StaticResource cvs_orders}}"/>
  </Grid>
    Private Sub SelectRows( ByVal sender As Object, ByVal e As MouseEventArgs )
  Dim groupHeaderControl As GroupHeaderControl = TryCast( sender, GroupHeaderControl );

  If groupHeaderControl Is Nothing Then
    Return;
  End If
  Dim context As DataGridContext = DataGridControl.GetDataGridContext( groupHeaderControl )

  Dim header As GroupHeaderFooterItem = TryCast( context.GetItemFromContainer( grouHeaderControl, GroupHeaderFooterItem )

  If Not header.Equals( GroupHeaderFooterItem.Empty ) Then

    Dim group As CollectionViewGroup = context.GetParentGroupFromItem( header )

    If Not group Is Nothing Then
      For Each item As Object In group.Items

        If Typeof item Is CollectionViewGroup Then
          Me.SelectRecurse( context, CType( item, CollectionViewGroup ) )
        Else
          context.SelectedItems.Add( item )
        End If
      Next item
    End If
  End If
End Sub

Private Sub SelectRecurse( ByVal context As DataGridContext, ByVal group As CollectionViewGroup )
  For Each item As Object In group.Items

    If Typeof item Is CollectionViewGroup Then
      Me.SelectRecurse( context, CType( item, CollectionViewGroup ) )
    Else
      context.SelectedItems.Add( item )
    End If
  Next item
End Sub
    private void SelectRows( object sender, MouseEventArgs e )
{
 GroupHeaderControl groupHeaderControl = sender as GroupHeaderControl;
 if( groupHeaderControl == null )
   return;
 DataGridContext context = DataGridControl.GetDataGridContext( groupHeaderControl );
 GroupHeaderFooterItem header = ( GroupHeaderFooterItem )context.GetItemFromContainer( groupHeaderControl );
 if( !header.Equals( GroupHeaderFooterItem.Empty ) )
 {
   CollectionViewGroup group = context.GetParentGroupFromItem( header );

   if( group != null )
   {
     foreach( object item in group.Items )
     {
       if( item is CollectionViewGroup )
       {
         this.SelectRecurse( context, ( CollectionViewGroup )item );
       }
       else
       {
         context.SelectedItems.Add( item );
       }
     }
   }
 }
}
private void SelectRecurse( DataGridContext context, CollectionViewGroup group )
{
 foreach( object item in group.Items )
 {
   if( item is CollectionViewGroup )
   {
     this.SelectRecurse( context, ( CollectionViewGroup )item );
   }
   else
   {
     context.SelectedItems.Add( item );
   }
 }
}
Language Filtered Section CS
    Inheritance Hierarchy

    System.Object
       System.ValueType
          Xceed.Wpf.DataGrid.GroupHeaderFooterItem

    Public Constructors
     NameDescription
    Public ConstructorGroupHeaderFooterItem Constructor  
    Top
    Public Fields
     NameDescription
    Public Fieldstatic (Shared in Visual Basic)EmptyRetrieves an empty GroupHeaderFooterItem structure.  
    Top
    Public Properties
     NameDescription
    Public PropertyGroupRetrieves the group to which the item belongs.  
    Public PropertyTemplateRetrieves the template that was used to create the item.  
    Top
    Public Methods
     NameDescription
    Public Methodstatic (Shared in Visual Basic)EqualsOverloaded. Indicates whether the GroupHeaderFooterItem instances are equal.  
    Public MethodGetHashCodeReturns the hash code for the current instance.  
    Top
    Public Operators
    public Operator Equality Tests if the two GroupHeaderFooterItem instances are equivalent.
    public Operator Inequality Tests if the two GroupHeaderFooterItem instances are different.
    Top
    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

    GroupHeaderFooterItem Members
    Xceed.Wpf.DataGrid Namespace

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