UIElement Class (System.Windows)

MSDN Library
Web Development
Silverlight
Silverlight 3
.NET Framework Class Library for Silverlight
System.Windows Namespace

UIElement Class

UIElement Members
UIElement Fields
UIElement Methods
UIElement Properties
UIElement Events

Related Links

Analytics Class
Application Class
ApplicationServiceContext Class
ApplicationUnhandledExceptionEventArgs Class
AssemblyPart Class
AssemblyPartCollection Class
CheckAndDownloadUpdateCompletedEventArgs Class
CheckAndDownloadUpdateCompletedEventHandler Delegate
CornerRadius Structure
CrossDomainAccess Enumeration
DataTemplate Class
DependencyObject Class
DependencyProperty Class
DependencyPropertyChangedEventArgs Structure
DependencyPropertyChangedEventHandler Delegate
Deployment Class
Duration Structure
DurationConverter Class
EventTrigger Class
ExceptionRoutedEventArgs Class
ExceptionRoutedEventHandler Delegate
Expression Class
ExtensionPart Class
ExternalPart Class
ExternalPartCollection Class
FontStretch Structure
FontStretches Class
FontStyle Structure
FontStyles Class
FontWeight Structure
FontWeights Class
FrameworkElement Class
FrameworkTemplate Class
GpuInformation Class
GridLength Structure
GridUnitType Enumeration
HierarchicalDataTemplate Class
HorizontalAlignment Enumeration
IApplicationLifetimeAware Interface
IApplicationService Interface
Icon Class
IconCollection Class
InstallState Enumeration
LineStackingStrategy Enumeration
MessageBox Class
MessageBoxButton Enumeration
MessageBoxResult Enumeration
NullableBoolConverter Class
OutOfBrowserSettings Class
Point Structure
PresentationFrameworkCollection(T) Class
PropertyChangedCallback Delegate
PropertyMetadata Class
PropertyPath Class
PropertyPathConverter Class
Rect Structure
ResourceDictionary Class
RoutedEvent Class
RoutedEventArgs Class
RoutedEventHandler Delegate
RoutedPropertyChangedEventArgs(T) Class
RoutedPropertyChangedEventHandler(T) Delegate
Setter Class
SetterBase Class
SetterBaseCollection Class
Size Structure
SizeChangedEventArgs Class
SizeChangedEventHandler Delegate
StartupEventArgs Class
StartupEventHandler Delegate
Style Class
StyleTypedPropertyAttribute Class
SystemColors Class
SystemParameters Class
TemplateBindingExpression Class
TemplatePartAttribute Class
TemplateVisualStateAttribute Class
TextAlignment Enumeration
TextDecorationCollection Class
TextDecorations Class
TextWrapping Enumeration
Thickness Structure
TriggerAction Class
TriggerActionCollection Class
TriggerBase Class
TriggerCollection Class
VerticalAlignment Enumeration
Visibility Enumeration
VisualState Class
VisualStateChangedEventArgs Class
VisualStateGroup Class
VisualStateManager Class
VisualTransition Class
WindowSettings Class

UIElement Class
This page is specific to:Microsoft Version:3.0 3.5Silverlight 34.0

.NET Framework Class Library for Silverlight

UIElement Class

UIElement is a base class for most of the objects that have visual appearance and can process basic input in Silverlight.

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

Syntax

C++

JScript

Copy to Clipboard Print

'Usage

Dim instance As UIElement

'Declaration

Public MustInherit Class UIElement _
    Inherits DependencyObject

Remarks

UIElement provides a starting point for Silverlight layout characteristics; FrameworkElement adds more layout capabilities.

Much of the input behavior for objects in a Silverlight UI is defined in the UIElement class. This includes the events for keyboard, mouse and stylus input, and focus events. Some of these events are routed events. A routed event enables a built-in event handling notification system, so that a parent object can handle input events from child objects in the object tree if the event remains unhandled. This input event behavior is useful for input area grouping, and control compositing.

Although UIElement defines the events for focus reporting (GotFocus, LostFocus), UIElement does not define an API for programmatically setting the focus. However, this capability is defined by the Control class and is thus present for many Silverlight classes.

UIElement does not expose a public constructor. It is not common to derive from either UIElement or FrameworkElement directly. More commonly used base classes for derived custom classes in Silverlight are:

Specific controls that are not sealed (for example, TextBox)
Control base classes (Control, ContentControl, UserControl)
Panel classes (the base class Panel, or specific non-sealed panel implementations, for example Grid)

Inheritance Hierarchy

System..::.Object
  System.Windows..::.DependencyObject
    System.Windows..::.UIElement
      System.Windows..::.FrameworkElement

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.

Platforms

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

Reference

UIElement Members

System.Windows Namespace

FrameworkElement

Other Resources

Silverlight Object Trees

Getting Started with Controls

Mouse Support

Silverlight Layout System

Events Overview for Silverlight

Hit Testing and Input Events