Class ComboBox

Represents a selection control that combines a non-editable text box and a drop-down containing a list box that allows users to select an item from a list.

Inheritance
System.Object
DependencyObject
UIElement
FrameworkElement
Control
ItemsControl
Selector
ComboBox
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.dll
Syntax
[TemplatePart(Name = "ContentPresenter", Type = typeof(ContentPresenter))]
[TemplatePart(Name = "Popup", Type = typeof(Popup))]
[TemplatePart(Name = "ContentPresenterBorder", Type = typeof(FrameworkElement))]
[TemplatePart(Name = "DropDownToggle", Type = typeof(ToggleButton))]
[TemplatePart(Name = "ScrollViewer", Type = typeof(ScrollViewer))]
public class ComboBox : Selector

Constructors

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ComboBox()

Initializes a new instance of the ComboBox class.

Declaration
public ComboBox()

Fields

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IsDropDownOpenProperty

Identifies the IsDropDownOpen dependency property.

Declaration
public static readonly DependencyProperty IsDropDownOpenProperty
Field Value
Type Description
DependencyProperty
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MaxDropDownHeightProperty

Identifies the MaxDropDownHeight dependency property.

Declaration
public static readonly DependencyProperty MaxDropDownHeightProperty
Field Value
Type Description
DependencyProperty

Properties

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IsDropDownOpen

Gets or sets a value that indicates whether the drop-down portion of the ComboBox is currently open.

Declaration
public bool IsDropDownOpen { get; set; }
Property Value
Type Description
System.Boolean
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IsEditable

Gets a value that indicates whether the user can edit text in the text box portion of the ComboBox. This property always returns false.

Declaration
public bool IsEditable { get; }
Property Value
Type Description
System.Boolean
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IsSelectionBoxHighlighted

Gets a value that indicates whether the SelectionBoxItem component is highlighted.

Declaration
[NotImplemented]
public bool IsSelectionBoxHighlighted { get; }
Property Value
Type Description
System.Boolean
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MaxDropDownHeight

Gets or sets the maximum height for a combo box drop-down.

Declaration
public double MaxDropDownHeight { get; set; }
Property Value
Type Description
System.Double
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SelectionBoxItem

Gets the item displayed in the selection box.

Declaration
public object SelectionBoxItem { get; }
Property Value
Type Description
System.Object
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SelectionBoxItemTemplate

Gets the template applied to the selection box content.

Declaration
public DataTemplate SelectionBoxItemTemplate { get; }
Property Value
Type Description
DataTemplate

Methods

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GetContainerForItemOverride()

Declaration
protected override DependencyObject GetContainerForItemOverride()
Returns
Type Description
DependencyObject
Overrides
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IsItemItsOwnContainerOverride(Object)

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

Declaration
public override void OnApplyTemplate()
Overrides
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OnDropDownClosed(EventArgs)

Invoked when the DropDownClosed event is raised.

Declaration
protected virtual void OnDropDownClosed(EventArgs e)
Parameters
Type Name Description
System.EventArgs e

Event data for the event.
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OnDropDownOpened(EventArgs)

Invoked when the DropDownOpened event is raised.

Declaration
protected virtual void OnDropDownOpened(EventArgs e)
Parameters
Type Name Description
System.EventArgs e

Event data for the event.
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OnSelectionChanged(SelectionChangedEventArgs)

Raises the SelectionChanged event

Declaration
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
Parameters
Type Name Description
SelectionChangedEventArgs e

The arguments for the event.
Overrides

Events

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DropDownClosed

Occurs when the drop-down portion of the ComboBox closes.

Declaration
public event EventHandler DropDownClosed
Event Type
Type Description
System.EventHandler
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DropDownOpened

Occurs when the drop-down portion of the ComboBox opens.

Declaration
public event EventHandler DropDownOpened
Event Type
Type Description
System.EventHandler

Extension Methods