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11/18/2011

ItemsPanelTemplate Class

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Specifies the panel that the ItemsPresenter creates for the layout of the items of an ItemsControl.

Inheritance Hierarchy

System.Object
  System.Windows.DependencyObject
    System.Windows.FrameworkTemplate
      System.Windows.Controls.ItemsPanelTemplate

Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)

Syntax

'Declaration
Public NotInheritable Class ItemsPanelTemplate _
    Inherits FrameworkTemplate

public sealed class ItemsPanelTemplate : FrameworkTemplate

<ItemsPanelTemplate ...>
  templateRootElement
</ItemsPanelTemplate>

XAML Values

templateRootElement
A single object element that derives from FrameworkElement.

The ItemsPanelTemplate type exposes the following members.

Constructors

	Name	Description
	ItemsPanelTemplate	Initializes a new instance of the ItemsPanelTemplate class.

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Properties

	Name	Description
	Dispatcher	Gets the Dispatcher this object is associated with. (Inherited from DependencyObject.)

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Methods

	Name	Description
	CheckAccess	Determines whether the calling thread has access to this object. (Inherited from DependencyObject.)
	ClearValue	Clears the local value of a dependency property. (Inherited from DependencyObject.)
	Equals(Object)	Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
	GetAnimationBaseValue	Returns any base value established for a Silverlight dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
	GetHashCode	Serves as a hash function for a particular type. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	GetValue	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ReadLocalValue	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
	SetValue	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Remarks

The ItemsPanelTemplate specifies the panel that is used for the layout of items. The ItemsControl has an ItemsPanel property that is of type ItemsPanelTemplate.

Examples

The following example creates a ListBox that displays its items horizontally. The example sets the ItemsPanel to a ItemsPanelTemplate that has a StackPanel whose Orientation property is set to Horizontal.

<Grid>
  <Grid.Resources>
    <Style x:Key="horizontalListBoxStyle" TargetType="ListBox">
      <Setter Property="ItemsPanel">
        <Setter.Value>
          <ItemsPanelTemplate>
            <StackPanel Orientation="Horizontal"
              VerticalAlignment="Center"
              HorizontalAlignment="Center"/>
          </ItemsPanelTemplate>
        </Setter.Value>
      </Setter>
    </Style>

    <src:Items x:Key="items"/>
  </Grid.Resources>

  <ListBox ItemsSource="{StaticResource items}" 
           Style="{StaticResource horizontalListBoxStyle}"/>

</Grid>

The following example shows the collection of strings to which the ListBox is bound.

Public Class Items
    Inherits System.Collections.ObjectModel.ObservableCollection(Of String)

    Public Sub New()
        Add("Item 1")
        Add("Item 2")
        Add("Item 3")
        Add("Item 4")
        Add("Item 5")
    End Sub
End Class

public class Items : 
    System.Collections.ObjectModel.ObservableCollection<string>
{
    public Items()
    {
        Add("Item 1");
        Add("Item 2");
        Add("Item 3");
        Add("Item 4");
        Add("Item 5");
    }
}

The preceding example produces output that is similar to the following illustration.

ListBox with items arranged horizontally

A ListBox that positions items horizontally.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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