ItemsControl.GroupStyle Özellik

Tanım

Ad Alanı:

System.Windows.Controls

Bütünleştirilmiş Kod:

PresentationFramework.dll

Her grup düzeyinin görünümünü tanımlayan bir nesne koleksiyonu GroupStyle alır.

public:
 property System::Collections::ObjectModel::ObservableCollection<System::Windows::Controls::GroupStyle ^> ^ GroupStyle { System::Collections::ObjectModel::ObservableCollection<System::Windows::Controls::GroupStyle ^> ^ get(); };

public System.Collections.ObjectModel.ObservableCollection<System.Windows.Controls.GroupStyle> GroupStyle { get; }

member this.GroupStyle : System.Collections.ObjectModel.ObservableCollection<System.Windows.Controls.GroupStyle>

Public ReadOnly Property GroupStyle As ObservableCollection(Of GroupStyle)

Özellik Değeri

ObservableCollection<GroupStyle>

Her grup düzeyinin görünümünü tanımlayan nesne koleksiyonu GroupStyle .

Örnekler

Aşağıdaki örneklerde, bir öğesine bağlı olan ItemsControl ve XmlDataProvider gruplandırma ekleme ve kaldırma mantığını içeren arka planda kod içeriği gösterilmektedir. Onay kutusu işaretlendiğinde, öğesinin ItemsControl içeriği özniteliğine Type göre gruplandırılır.

Her grup türündedir CollectionViewGroup. GroupStyle HeaderTemplate, her grubun öğesini görüntüleyen Name bir TextBlock olarak görünecek şekilde belirtilir. Bu durumda, Name veya HomeşeklindedirWork.

<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

Açıklamalar

Dizin 0'daki giriş en üst düzey grupları, dizin 1'deki giriş ise sonraki düzeyi açıklar ve bu şekilde devam eder. Koleksiyondaki girdilerden daha fazla gruplandırma düzeyi varsa, son giriş ek düzeyler için kullanılır.

XAML Özellik Öğesi Kullanımı

<object>  
  <object.GroupStyle>  
    OneOrMoreGroupStyleObjects  
  </object.GroupStyle>  
</object>  

XAML Değerleri

OneOrMoreGroupStyleObjects
Bir veya daha fazla GroupStyle nesne.

Ayrıca bkz.

• GroupStyleSelector