GroupStyle GroupStyle GroupStyle GroupStyle Class

Definition

Defines how you want the group to look at each level.

public ref class GroupStyle : System::ComponentModel::INotifyPropertyChanged
[System.Windows.Localizability(System.Windows.LocalizationCategory.None, Readability=System.Windows.Readability.Unreadable)]
public class GroupStyle : System.ComponentModel.INotifyPropertyChanged
type GroupStyle = class
    interface INotifyPropertyChanged
Public Class GroupStyle
Implements INotifyPropertyChanged
Inheritance
GroupStyleGroupStyleGroupStyleGroupStyle
Attributes
Implements

Examples

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. When the check box is checked, the content of the ItemsControl is grouped by the Type attribute.

Each group is of type CollectionViewGroup. The GroupStyle HeaderTemplate is specified so that it appears as a TextBlock that displays the Name of each the group. 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
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

Constructors

GroupStyle() GroupStyle() GroupStyle() GroupStyle()

Initializes a new instance of the GroupStyle class.

Fields

DefaultGroupPanel DefaultGroupPanel DefaultGroupPanel DefaultGroupPanel

Identifies the default ItemsPanelTemplate that creates the panel used to layout the items.

Properties

AlternationCount AlternationCount AlternationCount AlternationCount

Gets or sets the number of alternating GroupItem objects.

ContainerStyle ContainerStyle ContainerStyle ContainerStyle

Gets or sets the style that is applied to the GroupItem generated for each item.

ContainerStyleSelector ContainerStyleSelector ContainerStyleSelector ContainerStyleSelector

Enables the application writer to provide custom selection logic for a style to apply to each generated GroupItem.

Default Default Default Default

Gets the default style of the group.

HeaderStringFormat HeaderStringFormat HeaderStringFormat HeaderStringFormat

Gets or sets a composite string that specifies how to format the header if it is displayed as a string.

HeaderTemplate HeaderTemplate HeaderTemplate HeaderTemplate

Gets or sets the template that is used to display the group header.

HeaderTemplateSelector HeaderTemplateSelector HeaderTemplateSelector HeaderTemplateSelector

Enables the application writer to provide custom selection logic for a template that is used to display the group header.

HidesIfEmpty HidesIfEmpty HidesIfEmpty HidesIfEmpty

Gets or sets a value that indicates whether items corresponding to empty groups should be displayed.

Panel Panel Panel Panel

Gets or sets a template that creates the panel used to layout the items.

Methods

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Creates a shallow copy of the current Object.

(Inherited from Object)
OnPropertyChanged(PropertyChangedEventArgs) OnPropertyChanged(PropertyChangedEventArgs) OnPropertyChanged(PropertyChangedEventArgs) OnPropertyChanged(PropertyChangedEventArgs)

Raises the PropertyChanged event using the provided arguments.

ToString() ToString() ToString() ToString()

Returns a string that represents the current object.

(Inherited from Object)

Events

PropertyChanged PropertyChanged PropertyChanged PropertyChanged

Occurs when a property value changes.

Explicit Interface Implementations

INotifyPropertyChanged.PropertyChanged INotifyPropertyChanged.PropertyChanged INotifyPropertyChanged.PropertyChanged INotifyPropertyChanged.PropertyChanged

Applies to

See Also