Class Accordion

Represents a collection of collapsed and expanded AccordionItem controls.

Inheritance
System.Object
DependencyObject
UIElement
FrameworkElement
Control
ItemsControl
Accordion
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: System.Windows.Controls
Assembly: OpenSilver.Controls.Layout.Toolkit.dll
Syntax
[StyleTypedProperty(Property = "ItemContainerStyle", StyleTargetType = typeof(AccordionItem))]
[StyleTypedProperty(Property = "AccordionButtonStyle", StyleTargetType = typeof(AccordionButton))]
public class Accordion : ItemsControl, IControl, IFrameworkElement, IUIElement, IDependencyObject

Constructors

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Accordion()

Initializes a new instance of the Accordion class.

Declaration
public Accordion()

Fields

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AccordionButtonStyleProperty

Identifies the AccordionButtonStyle dependency property.

Declaration
public static readonly DependencyProperty AccordionButtonStyleProperty
Field Value
Type Description
DependencyProperty
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ContentTemplateProperty

Identifies the ContentTemplate dependency property.

Declaration
public static readonly DependencyProperty ContentTemplateProperty
Field Value
Type Description
DependencyProperty
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ExpandDirectionProperty

Identifies the ExpandDirection dependency property.

Declaration
public static readonly DependencyProperty ExpandDirectionProperty
Field Value
Type Description
DependencyProperty
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ItemContainerStyleProperty

Identifies the ItemContainerStyle dependency property.

Declaration
public static readonly DependencyProperty ItemContainerStyleProperty
Field Value
Type Description
DependencyProperty
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SelectedIndexProperty

Identifies the SelectedIndex dependency property.

Declaration
public static readonly DependencyProperty SelectedIndexProperty
Field Value
Type Description
DependencyProperty
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SelectedIndicesProperty

Identifies the SelectedIndices dependency property.

Declaration
public static readonly DependencyProperty SelectedIndicesProperty
Field Value
Type Description
DependencyProperty
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SelectedItemProperty

Identifies the SelectedItem dependency property.

Declaration
public static readonly DependencyProperty SelectedItemProperty
Field Value
Type Description
DependencyProperty
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SelectedItemsProperty

Identifies the SelectedItems dependency property.

Declaration
public static readonly DependencyProperty SelectedItemsProperty
Field Value
Type Description
DependencyProperty
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SelectionModeProperty

Identifies the SelectionMode dependency property.

Declaration
public static readonly DependencyProperty SelectionModeProperty
Field Value
Type Description
DependencyProperty
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SelectionSequenceProperty

Identifies the SelectionSequence dependency property.

Declaration
public static readonly DependencyProperty SelectionSequenceProperty
Field Value
Type Description
DependencyProperty

Properties

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AccordionButtonStyle

Gets or sets the Style that is applied to AccordionButton elements in the AccordionItems.

Declaration
public Style AccordionButtonStyle { get; set; }
Property Value
Type Description
Style
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ContentTemplate

Gets or sets the DataTemplate used to display the content of each generated AccordionItem.

Declaration
public DataTemplate ContentTemplate { get; set; }
Property Value
Type Description
DataTemplate
Remarks

Either ContentTemplate or ItemTemplate is used. Setting both will result in an exception.

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ExpandDirection

Gets or sets the ExpandDirection property of each AccordionItem in the Accordion control and the direction in which the Accordion does layout.

Declaration
public ExpandDirection ExpandDirection { get; set; }
Property Value
Type Description
ExpandDirection
Remarks

Setting the ExpandDirection will set the expand direction on the accordionItems.

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ItemContainerStyle

Gets or sets the Style that is applied to the container element generated for each item.

Declaration
public Style ItemContainerStyle { get; set; }
Property Value
Type Description
Style
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SelectedIndex

Gets or sets the index of the currently selected AccordionItem.

Declaration
public int SelectedIndex { get; set; }
Property Value
Type Description
System.Int32
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SelectedIndices

Gets the indices of the currently selected AccordionItems.

Declaration
public IList<int> SelectedIndices { get; }
Property Value
Type Description
System.Collections.Generic.IList<System.Int32>
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SelectedItem

Gets or sets the selected item.

Declaration
public object SelectedItem { get; set; }
Property Value
Type Description
System.Object
Remarks

The default value is null. When multiple items are allowed (IsMaximumOneSelected false), return the first of the selectedItems.

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SelectedItems

Gets the selected items.

Declaration
public IList SelectedItems { get; }
Property Value
Type Description
System.Collections.IList
Remarks

Does not allow setting.

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SelectionMode

Gets or sets the AccordionSelectionMode used to determine the minimum and maximum selected AccordionItems allowed in the Accordion.

Declaration
public AccordionSelectionMode SelectionMode { get; set; }
Property Value
Type Description
AccordionSelectionMode
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SelectionSequence

Gets or sets the SelectionSequence used to determine the order of AccordionItem selection.

Declaration
public SelectionSequence SelectionSequence { get; set; }
Property Value
Type Description
SelectionSequence

Methods

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ClearContainerForItemOverride(DependencyObject, Object)

Undoes the effects of the PrepareContainerForItemOverride(DependencyObject, Object) method.

Declaration
protected override void ClearContainerForItemOverride(DependencyObject element, object item)
Parameters
Type Name Description
DependencyObject element

The container element.
System.Object item

The item that should be cleared.
Overrides
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GetContainerForItemOverride()

Creates or identifies the element that is used to display the given item.

Declaration
protected override DependencyObject GetContainerForItemOverride()
Returns
Type Description
DependencyObject

The element that is used to display the given item.
Overrides
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IsItemItsOwnContainerOverride(Object)

Determines if the specified item is (or is eligible to be) its own container.

Declaration
protected override bool IsItemItsOwnContainerOverride(object item)
Parameters
Type Name Description
System.Object item

The item to check.
Returns
Type Description
System.Boolean

True if the item is (or is eligible to be) its own container; otherwise, false.
Overrides
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OnApplyTemplate()

Builds the visual tree for the Accordion control when a new template is applied.

Declaration
public override void OnApplyTemplate()
Overrides
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OnCreateAutomationPeer()

Returns a AccordionAutomationPeer for use by the Silverlight automation infrastructure.

Declaration
protected override AutomationPeer OnCreateAutomationPeer()
Returns
Type Description
AutomationPeer

A AccordionAutomationPeer object for the Accordion.
Overrides
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OnGotFocus(RoutedEventArgs)

Provides handling for the GotFocus event.

Declaration
protected override void OnGotFocus(RoutedEventArgs e)
Parameters
Type Name Description
RoutedEventArgs e

The data for the event.
Overrides
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OnItemsChanged(NotifyCollectionChangedEventArgs)

Invoked when the Items property changes.

Declaration
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
Parameters
Type Name Description
System.Collections.Specialized.NotifyCollectionChangedEventArgs e

Information about the change.
Overrides
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OnLostFocus(RoutedEventArgs)

Provides handling for the LostFocus event.

Declaration
protected override void OnLostFocus(RoutedEventArgs e)
Parameters
Type Name Description
RoutedEventArgs e

The data for the event.
Overrides
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OnMouseEnter(MouseEventArgs)

Provides handling for the MouseEnter event.

Declaration
protected override void OnMouseEnter(MouseEventArgs e)
Parameters
Type Name Description
MouseEventArgs e

The data for the event.
Overrides
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OnMouseLeave(MouseEventArgs)

Provides handling for the MouseLeave event.

Declaration
protected override void OnMouseLeave(MouseEventArgs e)
Parameters
Type Name Description
MouseEventArgs e

The data for the event.
Overrides
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OnMouseLeftButtonDown(MouseButtonEventArgs)

Provides handling for the MouseLeftButtonDown event.

Declaration
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
Parameters
Type Name Description
MouseButtonEventArgs e

The data for the event.
Overrides
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OnMouseLeftButtonUp(MouseButtonEventArgs)

Called before the MouseLeftButtonUp event occurs.

Declaration
protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e)
Parameters
Type Name Description
MouseButtonEventArgs e

The data for the event.
Overrides
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OnSelectedItemChanged(SelectionChangedEventArgs)

Raises the SelectedItemChanged event when the SelectedItem property value changes.

Declaration
protected virtual void OnSelectedItemChanged(SelectionChangedEventArgs e)
Parameters
Type Name Description
SelectionChangedEventArgs e

The SelectionChangedEventArgs instance containing the event data.
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PrepareContainerForItemOverride(DependencyObject, Object)

Prepares the specified element to display the specified item.

Declaration
protected override void PrepareContainerForItemOverride(DependencyObject element, object item)
Parameters
Type Name Description
DependencyObject element

The element used to display the specified item.
System.Object item

The item to display.
Overrides
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SelectAll()

Selects all the AccordionItems in the Accordion control.

Declaration
public void SelectAll()
Remarks

If the Accordion SelectionMode is OneOrMore or ZeroOrMore all AccordionItems would be selected. If the Accordion SelectionMode is One or ZeroOrOne all items would be selected and unselected. Only the last AccordionItem would remain selected.

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UnselectAll()

Unselects all the AccordionItems in the Accordion control.

Declaration
public void UnselectAll()
Remarks

If the Accordion SelectionMode is Zero or ZeroOrMore all AccordionItems would be Unselected. If SelectionMode is One or
OneOrMode than all items would be Unselected and selected. Only the first AccordionItem would still be selected.

Events

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SelectedItemsChanged

Occurs when the SelectedItems collection changes.

Declaration
public event NotifyCollectionChangedEventHandler SelectedItemsChanged
Event Type
Type Description
System.Collections.Specialized.NotifyCollectionChangedEventHandler
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SelectionChanged

Occurs when the SelectedItem or SelectedItems property value changes.

Declaration
public event SelectionChangedEventHandler SelectionChanged
Event Type
Type Description
SelectionChangedEventHandler

Extension Methods