Export (0) Print
Expand All

ApplicationCommands Class

Provides a standard set of application related commands.

System.Object
  System.Windows.Input.ApplicationCommands

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

public static class ApplicationCommands

The ApplicationCommands type exposes the following members.

  NameDescription
Public propertyStatic memberCancelPrintGets the value that represents the Cancel Print command.
Public propertyStatic memberCloseGets the value that represents the Close command.
Public propertyStatic memberContextMenuGets the value that represents the Context Menu command.
Public propertyStatic memberCopyGets the value that represents the Copy command.
Public propertyStatic memberCorrectionList Gets the value that represents the Correction List command.
Public propertyStatic memberCut Gets the value that represents the Cut command.
Public propertyStatic memberDelete Gets the value that represents the Delete command.
Public propertyStatic memberFind Gets the value that represents the Find command.
Public propertyStatic memberHelp Gets the value that represents the Help command.
Public propertyStatic memberNew Gets the value that represents the New command.
Public propertyStatic memberNotACommandRepresents a command which is always ignored.
Public propertyStatic memberOpen Gets the value that represents the Open command.
Public propertyStatic memberPaste Gets the value that represents the Paste command.
Public propertyStatic memberPrint Gets the value that represents the Print command.
Public propertyStatic memberPrintPreview Gets the value that represents the Print Preview command.
Public propertyStatic memberPropertiesGets the value that represents the Properties command.
Public propertyStatic memberRedo Gets the value that represents the Redo command.
Public propertyStatic memberReplace Gets the value that represents the Replace command.
Public propertyStatic memberSave Gets the value that represents the Save command.
Public propertyStatic memberSaveAs Gets the value that represents the Save As command.
Public propertyStatic memberSelectAllGets the value that represents the Select All command.
Public propertyStatic memberStop Gets the value that represents the Stop command.
Public propertyStatic memberUndoGets the value that represents the Undo command.
Top

The commands in the ApplicationCommands class and commands in the other command library classes, such as ComponentCommands and NavigationCommands, are intended to represent a set of common commands that application programmers encounter frequently. The commands only represent the instance of the RoutedCommand and not the implementation logic for the command. The implementation logic is bound to the command with a CommandBinding. For example, if the Close command is executed on a control, the logic which performs the Close command may not be provided by the control, so the application writer will be responsible for writing the logic that determines how the control will handle the command.

Many controls do provide implementation logic for many of the commands in the command library. For example, the TextBox class provides logic for the Paste, Cut, Copy, Undo, and Redo commands.

For more information on commands and commanding see the Commanding Overview.

The following example shows how to hook up a RoutedCommand to a Control which has built in support for the command. For a complete sample which hooks up commands to multiple sources, see the Create a Custom RoutedCommand Sample sample.

Windows Presentation Foundation (WPF) provides a library of common commands which application programmers encounter regularly. The classes which comprise the command library are: ApplicationCommands, ComponentCommands, NavigationCommands, MediaCommands, and EditingCommands.

The static RoutedCommand objects which make up these classes do not supply command logic. The logic for the command is associated with the command with a CommandBinding. Some controls have built in CommandBindings for some commands. This mechanism allows the semantics of a command to stay the same, while the actual implementation is can change. A TextBox, for example, handles the Paste command differently than a control designed to support images, but the basic idea of what it means to paste something stays the same. The command logic cannot be supplied by the command, but rather must be supplied by the control or the application.

Many controls in WPF do have built in support for some of the commands in the command library. TextBox, for example, supports many of the application edit commands such as Paste, Copy, Cut, Redo, and Undo. The application developer does not have to do anything special to get these commands to work with these controls. If the TextBox is the command target when the command is executed, it will handle the command using the CommandBinding that is built into the control.

The following shows how to use a MenuItem as the command source for the Paste command, where a TextBox is the target of the command. All the logic that defines how the TextBox performs the paste is built into the TextBox control.

A MenuItem is created and it's Command property is set to the Paste command. The CommandTarget is not explicitly set to the TextBox object. When the CommandTarget is not set, the target for the command is the element which has keyboard focus. If the element which has keyboard focus does not support the Paste command or cannot currently execute the paste command (the clipboard is empty, for example) then the MenuItem would be grayed out.

<Window x:Class="SDKSamples.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MenuItemCommandTask"
    >
    <DockPanel>
      <Menu DockPanel.Dock="Top">
        <MenuItem Command="ApplicationCommands.Paste" Width="75" />
      </Menu>
      <TextBox BorderBrush="Black" BorderThickness="2" Margin="25"
               TextWrapping="Wrap">
        The MenuItem will not be enabled until
        this TextBox gets keyboard focus  
      </TextBox>
    </DockPanel>
</Window>
// Window1 constructor 
public Window1()
{
    InitializeComponent();

    // Instantiating UIElements.
    DockPanel mainPanel = new DockPanel();
    Menu mainMenu = new Menu();
    MenuItem pasteMenuItem = new MenuItem();
    TextBox mainTextBox = new TextBox();

    // Associating the MenuItem with the Paste command.
    pasteMenuItem.Command = ApplicationCommands.Paste;

    // Setting properties on the TextBox.
    mainTextBox.Text =
        "The MenuItem will not be enabled until this TextBox receives keyboard focus.";
    mainTextBox.Margin = new Thickness(25);
    mainTextBox.BorderBrush = Brushes.Black;
    mainTextBox.BorderThickness = new Thickness(2);
    mainTextBox.TextWrapping = TextWrapping.Wrap;

    // Attaching UIElements to the Window. 
    this.AddChild(mainPanel);
    mainMenu.Items.Add(pasteMenuItem);
    mainPanel.Children.Add(mainMenu);
    mainPanel.Children.Add(mainTextBox);

    // Defining DockPanel layout.
    DockPanel.SetDock(mainMenu, Dock.Top);
    DockPanel.SetDock(mainTextBox, Dock.Bottom);
}

More Code

How to: Hook Up a Command to a Control with No Command SupportThe following example shows how to hook up a RoutedCommand to a Control which does not have built in support for the command. For a complete sample which hooks up commands to multiple sources, see the Create a Custom RoutedCommand Sample sample.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Show:
© 2014 Microsoft