GroupStyle.HeaderTemplate Propriété

Définition

Obtient ou définit le modèle utilisé pour afficher l'en-tête de groupe.Gets or sets the template that is used to display the group header.

public:
 property System::Windows::DataTemplate ^ HeaderTemplate { System::Windows::DataTemplate ^ get(); void set(System::Windows::DataTemplate ^ value); };
public System.Windows.DataTemplate HeaderTemplate { get; set; }
member this.HeaderTemplate : System.Windows.DataTemplate with get, set
Public Property HeaderTemplate As DataTemplate

Valeur de propriété

Objet DataTemplate utilisé pour afficher l'en-tête de groupe.A DataTemplate object that is used to display the group header. La valeur par défaut est null.The default is null.

Exemples

Les exemples suivants montrent un ItemsControl qui est lié à un XmlDataProvider et le contenu code-behind qui contient la logique permettant d’ajouter et de supprimer le regroupement.The following examples show an ItemsControl that is bound to an XmlDataProvider and the code-behind content that contains the logic to add and remove grouping. Lorsque la case à cocher est activée, le contenu ItemsControl de est regroupé Type par attribut.When the check box is checked, the content of the ItemsControl is grouped by the Type attribute.

Chaque groupe est de type CollectionViewGroup.Each group is of type CollectionViewGroup. Le GroupStyle TextBlock Name est spécifié afin qu’il apparaisse sous la forme d’un qui affiche le de chaque groupe. HeaderTemplateThe GroupStyle HeaderTemplate is specified so that it appears as a TextBlock that displays the Name of each the group. Dans ce cas, Name est soit Work ou Home.In this case, the Name is either Work or Home.

<Window x:Class="GroupingSample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Grouping Sample"
    Width="220" Height="550">
  <StackPanel>

    <StackPanel.Resources>
      <XmlDataProvider x:Key="myTasks" XPath="Tasks/Task">
        <x:XData>
          <Tasks xmlns="">
            <Task Name="Groceries" Priority="2" Type="Home">
              <Description>Pick up Groceries and Detergent</Description>
            </Task>
            <Task Name="Laundry" Priority="2" Type="Home">
              <Description>Do Laundry</Description>
            </Task>
            <Task Name="Email" Priority="1" Type="Work">
              <Description>Email Clients</Description>
            </Task>
            <Task Name="Clean" Priority="3" Type="Work">
              <Description>Clean my office</Description>
            </Task>
            <Task Name="Dinner" Priority="1" Type="Home">
              <Description>Get ready for family reunion</Description>
            </Task>
            <Task Name="Proposals" Priority="2" Type="Work">
              <Description>Review new budget proposals</Description>
            </Task>
          </Tasks>
        </x:XData>
      </XmlDataProvider>
    </StackPanel.Resources>

    <TextBlock Margin="12,5,5,0" FontSize="20" Text="My Task List"/>
    <CheckBox Margin="10,5,5,10" Checked="AddGrouping"
              Unchecked="RemoveGrouping">Group by task type</CheckBox>
    <ItemsControl Margin="10" Name="myItemsControl"
                  ItemsSource="{Binding Source={StaticResource myTasks}}">
      <ItemsControl.ItemTemplate>
        <DataTemplate>
          <DataTemplate.Resources>
            <Style TargetType="TextBlock">
              <Setter Property="FontSize" Value="18"/>
              <Setter Property="HorizontalAlignment" Value="Center"/>
            </Style>
          </DataTemplate.Resources>
          <Grid>
            <Ellipse Fill="Silver"/>
            <StackPanel>
              <TextBlock Margin="3,3,3,0"
                         Text="{Binding XPath=@Name}"/>
              <TextBlock Margin="3,0,3,7"
                         Text="{Binding XPath=@Priority}"/>
            </StackPanel>
          </Grid>
        </DataTemplate>
      </ItemsControl.ItemTemplate>
      <ItemsControl.ItemContainerStyle>
        <Style>
          <Setter Property="Control.Width" Value="100"/>
          <Setter Property="Control.Margin" Value="5"/>
        </Style>
      </ItemsControl.ItemContainerStyle>
      <ItemsControl.GroupStyle>
        <GroupStyle>
          <GroupStyle.HeaderTemplate>
            <DataTemplate>
              <TextBlock FontWeight="Bold" FontSize="15"
                         Text="{Binding Path=Name}"/>
            </DataTemplate>
          </GroupStyle.HeaderTemplate>
        </GroupStyle>
      </ItemsControl.GroupStyle>
    </ItemsControl>
  </StackPanel>
</Window>
using System;
using System.Windows;
using System.Windows.Data;

namespace GroupingSample
{
    public partial class Window1 : System.Windows.Window
    {

        public Window1()
        {
            InitializeComponent();
        }

        CollectionView myView;
        private void AddGrouping(object sender, RoutedEventArgs e)
        {
            myView = (CollectionView)CollectionViewSource.GetDefaultView(myItemsControl.ItemsSource);
            if (myView.CanGroup == true)
            {
                PropertyGroupDescription groupDescription
                    = new PropertyGroupDescription("@Type");
                myView.GroupDescriptions.Add(groupDescription);
            }
            else
                return;
        }

        private void RemoveGrouping(object sender, RoutedEventArgs e)
        {
            myView = (CollectionView)CollectionViewSource.GetDefaultView(myItemsControl.ItemsSource);
            myView.GroupDescriptions.Clear();
        }
    }
}

Imports System.Windows
Imports System.Windows.Data

Namespace GroupingSample
    Partial Public Class Window1
        Inherits System.Windows.Window

        Public Sub New()
            InitializeComponent()
        End Sub

        Private myView As CollectionView
        Private Sub AddGrouping(ByVal sender As Object, ByVal e As RoutedEventArgs)
            myView = CType(CollectionViewSource.GetDefaultView(myItemsControl.ItemsSource), CollectionView)
            If myView.CanGroup = True Then
                Dim groupDescription As New PropertyGroupDescription("@Type")
                myView.GroupDescriptions.Add(groupDescription)
            Else
                Return
            End If
        End Sub

        Private Sub RemoveGrouping(ByVal sender As Object, ByVal e As RoutedEventArgs)
            myView = CType(CollectionViewSource.GetDefaultView(myItemsControl.ItemsSource), CollectionView)
            myView.GroupDescriptions.Clear()
        End Sub
    End Class
End Namespace

L’exemple suivant montre comment utiliser la HeaderTemplate propriété :The following example shows how to use the HeaderTemplate property:


<ListBox Name="Master" Grid.Row="2" Grid.ColumnSpan="3" Margin="8"
    ItemsSource="{Binding Source={StaticResource listingDataView}}">
    <ListBox.GroupStyle>
        <GroupStyle 
          HeaderTemplate="{StaticResource groupingHeaderTemplate}"
          />
    </ListBox.GroupStyle>
</ListBox>

Voici la définition de groupingHeaderTemplate: DataTemplateThe following is the definition of the groupingHeaderTemplateDataTemplate:

<DataTemplate x:Key="groupingHeaderTemplate">
    <TextBlock Text="{Binding Path=Name}"
               Foreground="Navy" FontWeight="Bold" FontSize="12"/>
</DataTemplate>

Pour obtenir l’exemple complet, consultez démonstration de la liaison de données.For the complete sample, see Data Binding Demo.

S’applique à

Voir aussi