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, IControl, IFrameworkElement, IUIElement, IDependencyObject

Constructors

| Improve this Doc View Source

ComboBox()

Initializes a new instance of the ComboBox class.

Declaration
public ComboBox()

Fields

| Improve this Doc View Source

IsDropDownOpenProperty

Identifies the IsDropDownOpen dependency property.

Declaration
public static readonly DependencyProperty IsDropDownOpenProperty
Field Value
Type Description
DependencyProperty
| Improve this Doc View Source

IsSelectionActiveProperty

Identifies the IsSelectionActive attached property.

Declaration
public static readonly DependencyProperty IsSelectionActiveProperty
Field Value
Type Description
DependencyProperty
| Improve this Doc View Source

MaxDropDownHeightProperty

Identifies the MaxDropDownHeight dependency property.

Declaration
public static readonly DependencyProperty MaxDropDownHeightProperty
Field Value
Type Description
DependencyProperty

Properties

| Improve this Doc View Source

HandlesScrolling

Gets a value that indicates whether a control supports scrolling.

Declaration
protected override bool HandlesScrolling { get; }
Property Value
Type Description
System.Boolean

true if the control has a ScrollViewer in its style and has a custom keyboard scrolling behavior; otherwise, false.
Overrides
| Improve this Doc View Source

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
| Improve this Doc View Source

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
| Improve this Doc View Source

IsSelectionBoxHighlighted

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

Declaration
[NotImplemented]
public bool IsSelectionBoxHighlighted { get; }
Property Value
Type Description
System.Boolean
| Improve this Doc View Source

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
| Improve this Doc View Source

SelectionBoxItem

Gets the item displayed in the selection box.

Declaration
public object SelectionBoxItem { get; }
Property Value
Type Description
System.Object
| Improve this Doc View Source

SelectionBoxItemTemplate

Gets the template applied to the selection box content.

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

Methods

| Improve this Doc View Source

GetContainerForItemOverride()

Declaration
protected override DependencyObject GetContainerForItemOverride()
Returns
Type Description
DependencyObject
Overrides
| Improve this Doc View Source

IsItemItsOwnContainerOverride(Object)

Declaration
protected override bool IsItemItsOwnContainerOverride(object item)
Parameters
Type Name Description
System.Object item
Returns
Type Description
System.Boolean
Overrides
| Improve this Doc View Source

OnApplyTemplate()

Declaration
public override void OnApplyTemplate()
Overrides
| Improve this Doc View Source

OnCreateAutomationPeer()

Returns a ComboBoxAutomationPeer for use by the Silverlight automation infrastructure.

Declaration
protected override AutomationPeer OnCreateAutomationPeer()
Returns
Type Description
AutomationPeer

A ComboBoxAutomationPeer for the ComboBox object.
Overrides
| Improve this Doc View Source

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.
| Improve this Doc View Source

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.
| Improve this Doc View Source

OnGotFocus(RoutedEventArgs)

Provides handling for the GotFocus event.

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

The event data.
Overrides
| Improve this Doc View Source

OnKeyDown(KeyEventArgs)

Declaration
protected override void OnKeyDown(KeyEventArgs e)
Parameters
Type Name Description
KeyEventArgs e
Overrides
| Improve this Doc View Source

OnLostFocus(RoutedEventArgs)

Provides handling for the LostFocus event.

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

The event data.
Overrides
| Improve this Doc View Source

OnMouseEnter(MouseEventArgs)

Provides handling for the MouseEnter event that occurs when the mouse pointer enters this control.

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

The event data.
Overrides
| Improve this Doc View Source

OnMouseLeave(MouseEventArgs)

Provides handling for the MouseLeave event that occurs when the mouse pointer leaves the combo box.

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

The event data.
Overrides
| Improve this Doc View Source

OnMouseLeftButtonDown(MouseButtonEventArgs)

Provides handling for the MouseLeftButtonDown event that occurs when the left mouse button is pressed while the mouse pointer is over the combo box.

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

The event data.
Overrides
| Improve this Doc View Source

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

| Improve this Doc View Source

DropDownClosed

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

Declaration
public event EventHandler DropDownClosed
Event Type
Type Description
System.EventHandler
| Improve this Doc View Source

DropDownOpened

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

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

Extension Methods