XamlUICommand Class

Reference

Definition

Namespace:: Windows.UI.Xaml.Input

Important

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Edit

Provides a base class for defining the command behavior of an interactive UI element that performs an action when invoked (such as sending an email, deleting an item, or submitting a form).

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 458752)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class XamlUICommand : DependencyObject, ICommand

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 458752)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public class XamlUICommand : DependencyObject, ICommand

Public Class XamlUICommand
Inherits DependencyObject
Implements ICommand

Inheritance: Object IInspectable DependencyObject XamlUICommand

Derived: Windows.UI.Xaml.Input.StandardUICommand

Attributes: ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Implements: ICommand ICommand

Windows requirements

Device family	Windows 10, version 1809 (introduced in 10.0.17763.0)
API contract	Windows.Foundation.UniversalApiContract (introduced in v7.0)

Examples

Tip

For more info, design guidance, and code examples, see Command design basics.

If you have the WinUI 2 Gallery app installed, click here to open the app and see the StandardUICommand in action.

Remarks

Implements the ICommand interface (Windows.UI.Xaml.Input.ICommand for C++ or System.Windows.Input.ICommand for C#), adding various UI properties, methods, and events.

XamlUICommand derived classes

XamlUICommand is the parent class for StandardUICommand, which exposes a set of standard platform commands with pre-defined properties.

For a basic commanding example see the Button control, which is designed to make something happen when a user clicks it.

There are two ways to process a Button command (controls with a Command property support similar functionality):

Handle the Click event
Bind the Command property to an ICommand implementation that describes the command logic

XamlUICommand lets you specify UI through the control binding, such as an icon, label, description, and keyboard shortcuts (both an access key and a keyboard accelerator), without setting the individual properties.

Constructors

XamlUICommand()

Initializes a new instance of the XamlUICommand class.

Properties

AccessKey	Gets or sets the access key (mnemonic) for this element.
AccessKeyProperty	Identifies the AccessKey dependency property.
Command	Gets or sets the command behavior of an interactive UI element that performs an action when invoked, such as sending an email, deleting an item, or submitting a form.
CommandProperty	Identifies the Command dependency property.
Description	Gets or sets a description for this element.
DescriptionProperty	Identifies the Description dependency property.
Dispatcher	Gets the CoreDispatcher that this object is associated with. The CoreDispatcher represents a facility that can access the DependencyObject on the UI thread even if the code is initiated by a non-UI thread. (Inherited from DependencyObject)
IconSource	Gets or sets a glyph from the Segoe MDL2 Assets font for this element.
IconSourceProperty	Identifies the IconSource dependency property.
KeyboardAccelerators	Gets or sets the collection of key combinations for this element that invoke an action using the keyboard.
KeyboardAcceleratorsProperty	Identifies the KeyboardAccelerators dependency property.
Label	Gets or sets the label for this element.
LabelProperty	Identifies the Label dependency property.

Methods

CanExecute(Object)	Retrieves whether the command can execute in its current state.
ClearValue(DependencyProperty)	Clears the local value of a dependency property. (Inherited from DependencyObject)
Execute(Object)	Invokes the command.
GetAnimationBaseValue(DependencyProperty)	Returns any base value established for a dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject)
GetValue(DependencyProperty)	Returns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject)
NotifyCanExecuteChanged()	Notifies the system that the command state has changed.
ReadLocalValue(DependencyProperty)	Returns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	Registers a notification function for listening to changes to a specific DependencyProperty on this DependencyObject instance. (Inherited from DependencyObject)
SetValue(DependencyProperty, Object)	Sets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	Cancels a change notification that was previously registered by calling RegisterPropertyChangedCallback. (Inherited from DependencyObject)

Events

CanExecuteChanged	Occurs whenever something happens that affects whether the command can execute.
CanExecuteRequested	Occurs when a CanExecute call is made.
ExecuteRequested	Occurs when an Execute call is made.

Applies to

Delen via