首页 > 代码库 > ApplicationCommands用于表示应用程序程序员经常遇到的常见命令,类似于ctrl+c

ApplicationCommands用于表示应用程序程序员经常遇到的常见命令,类似于ctrl+c

在WPF中,许多控件都自动集成了固有的命令集。比如文本框TextBox就提供了复制(Copy),粘贴(Paste),裁切(Cut),撤消(Undo)和重做(Redo)命令等。

WPF提供常用应用程序所用的命令集,常用的命令集包括:ApplicationCommands, ComponentCommands, NavigationCommands, MediaCommands和EditingCommands

ApplicationCommands(应用程序命令):  CancelPrint:取消打印  Close:关闭  ContextMenu:上下文菜单  Copy:复制  CorrectionList: Gets the value that represents the Correction List command.    Cut:剪切  Delete:删除  Find:查找  Help:帮助  New:新建  NotACommand:不是命令,被忽略  Open:打开  Paste:粘贴  Print:打印  PrintPreview:打印预览  Properties:属性  Redo:重做  Replace:取代  Save:保存  SaveAs:另存为  SelectAll:选择所有的  Stop:停止  Undo:撤消

ComponentCommands(组件命令):  ExtendSelection:后接Down/Left/Right/Up, 比如:ExtendSelectionDown(Shift+Down,Extend Selection Down),ExtendSelectionLeft等  Move:后接Down/Left/Right/Up, 如:MoveDown  MoveFocus:后接Down/Forward/Back/Up, 如:MoveFocusDown  MoveFocusPage:后接Down/Up,如:MoveFocusPageUp  MoveTo:后接End/Home/PageDown/PageUp,比如:MoveToPageDown  ScrollByLine  ScrollPage:后接Down/Left/Right/Up,比如:ScrollPageLeft  SelectTo:End/Home/PageDown/PageUp,比如:SelectToEnd

NavigationCommands(导航命令):  Browse浏览: 后接Back/Forward/Home/Stop, 比如:BrowseBack  缩放显示:DecreaseZoom, IncreaseZoom, Zoom  Favorites(收藏)  页面:FirstPage, LastPage, PreviousPage, NextPage,GoToPage  NavigateJournal  Refresh(刷新)  Search(搜索)

MediaCommands(多媒体控制命令):  Treble高音:DecreaseTreble,IncreaseTreble  Bass低音:BoostBass,DecreaseBass,IncreaseBass  Channel频道:ChannelDown,ChannelUp  MicrophoneVolume麦克风音量调节:DecreaseMicrophoneVolume,IncreaseMicrophoneVolume,MuteMicrophoneVolume  ToggleMicrophoneOnOff:麦克风开关  Volume音量: DecreaseVolume,IncreaseVolume,MuteVolume  Rewind, FastForward(回放,快进)  Track轨道:PreviousTrack,NextTrack [上一段(节)]  Play,Pause,Stop,Record(播放,暂停,停止,录制)  TogglePlayPause  Select选择

EditingCommands(编辑/排版类命令):  Align对齐:AlignCenter,AlignJustify,AlignLeft,AlignRight(居中,撑满,左对齐,右对齐)  Backspace退格  TabForward,TabBackward(Tab前缩,Tab向后)  FontSize字体大小:DecreaseFontSize,IncreaseFontSize  Indentation缩排:DecreaseIndentation, IncreaseIndentation  Delete删除: Delete选中部分,DeleteNextWord:删除后一字,DeletePreviousWord:删除前一字  EnterLineBreak:换行  EnterParagraphBreak:换段  CorrectSpellingError/IgnoreSpellingError:纠正/忽略拼写错误  MoveUpByLine,MoveDownByLine: 上/下移一行,  MoveUpByPage,MoveDownByPage: 上/下移一页  MoveUpByParagraph,MoveDownByParagraph: 上/下移一段  MoveLeftByCharacter/MoveRightByCharacter:左/右移一字符  MoveLeftByWord/MoveRightByWord 左/右移一词  MoveToDocumentStart/MoveToDocumentEnd:到文章开头/结尾  MoveToLineStart/MoveToLineEnd:到一行的开头/结尾  SelectUpByLine,SelectDownByLine:向上/下选一行  SelectUpByPage,SelectDownByPage:向上/下选一页  SelectUpByParagraph,SelectDownByParagraph:向上/下选一段  SelectLeftByCharacter,SelectRightByCharacter:向左/右选中一字  SelectLeftByWord,SelectRightByWord:向左/右选中一词  SelectToDocumentStart,SelectToDocumentEnd: 选中到篇头/篇尾  SelectToLineStart/SelectToLineEnd:选中到行首/行尾  ToggleBold, ToggleItalic, ToggleUnderline(加粗,斜体,下划线)  ToggleBullets, ToggleNumbering(列表:加点,加数字)  ToggleInsert:插入  ToggleSuperscript,ToggleSubscript(上标字,下标字)

先来举一个简单的例子:

XAML代码: <StackPanel>   <Menu>     <MenuItem Command="ApplicationCommands.Paste" />   </Menu>   <TextBox /> </StackPanel>

C#代码: StackPanel mainStackPanel = new StackPanel(); TextBox pasteTextBox = new TextBox(); Menu stackPanelMenu = new Menu(); MenuItem pasteMenuItem = new MenuItem();

stackPanelMenu.Items.Add(pasteMenuItem); mainStackPanel.Children.Add(stackPanelMenu); mainStackPanel.Children.Add(pasteTextBox);

pasteMenuItem.Command = ApplicationCommands.Paste;

上面代码演示了将对文本框设置为焦点时,菜单项可用,点击菜单项时,将执行粘贴命令。
下面列出关于Command的四个概念和四个小问题: 1、WPF中Command(命令)的四个概念: (1)命令command:要执行的动作。 (2)命令源command source:发出命令的对象(继承自ICommandSource)。 (3)命令目标command target:执行命令的主体 (4)命令绑定command binding:映射命令逻辑的对象 比如在上面示例中,粘贴(Paste)就是命令(command), 菜单项(MenuItem)是命令源(command source), 文本框(TextBox)是命令目标对象(command target), 命令绑定到command binding文本框(TextBox)控件上。

提示:WPF中的命令都继承自ICommand接口。ICommand暴露两个方法:Execute方法、 CanExecute方法和一个事件:CanExecuteChanged。 继承自ICommandSource的有:ButtonBase, MenuItem, Hyperlink和InputBinding。 而Button,GridViewColumnHeader,ToggleButton,RepeatButton继承自ButtonBase。System.Windows.Input.KeyBinding和MouseBinding继承自InputBinding。

2、四个小问题: (1)如何指定Command Sources? XAML:(请将“ApplicationCommands.Properties”换成对应的ApplicationCommands属性值,比如:ApplicationCommands.Copy) <StackPanel>   <StackPanel.ContextMenu>     <ContextMenu>       <MenuItem Command="ApplicationCommands.Properties" />     </ContextMenu>   </StackPanel.ContextMenu> </StackPanel>

同等的C#代码: StackPanel cmdSourcePanel = new StackPanel(); ContextMenu cmdSourceContextMenu = new ContextMenu(); MenuItem cmdSourceMenuItem = new MenuItem();

cmdSourcePanel.ContextMenu = cmdSourceContextMenu; cmdSourcePanel.ContextMenu.Items.Add(cmdSourceMenuItem);

cmdSourceMenuItem.Command = ApplicationCommands.Properties;

(2)如何指定快捷键?

XAML代码: <Window.InputBindings>   <KeyBinding Key="B"               Modifiers="Control"                Command="ApplicationCommands.Open" /> </Window.InputBindings>

C#代码: KeyGesture OpenKeyGesture = new KeyGesture(     Key.B,     ModifierKeys.Control);

KeyBinding OpenCmdKeybinding = new KeyBinding(ApplicationCommands.Open,OpenKeyGesture); this.InputBindings.Add(OpenCmdKeybinding); //也可以这样(下面一句与上面两句的效果等同): //ApplicationCommands.Open.InputGestures.Add(OpenKeyGesture);   (3)如何Command Binding? XAML代码: <Window.CommandBindings>   <CommandBinding Command="ApplicationCommands.Open"                   Executed="OpenCmdExecuted"                   CanExecute="OpenCmdCanExecute"/> </Window.CommandBindings>

C#代码: CommandBinding OpenCmdBinding = new CommandBinding(     ApplicationCommands.Open,     OpenCmdExecuted,     OpenCmdCanExecute);

this.CommandBindings.Add(OpenCmdBinding);

具体的事件处理: C#代码: void OpenCmdExecuted(object target, ExecutedRoutedEventArgs e) {     MessageBox.Show("The command has been invoked."); }

void OpenCmdCanExecute(object sender, CanExecuteRoutedEventArgs e) {     e.CanExecute = true; }

(4)如何设置Command Target并进行绑定Command Binding? XAML代码: <StackPanel>   <Menu>     <MenuItem Command="ApplicationCommands.Paste"               CommandTarget="{Binding ElementName=mainTextBox}" />   </Menu>   <TextBox Name="mainTextBox"/> </StackPanel>   C#代码: StackPanel mainStackPanel = new StackPanel(); TextBox mainTextBox= new TextBox(); Menu stackPanelMenu = new Menu(); MenuItem pasteMenuItem = new MenuItem();

stackPanelMenu.Items.Add(pasteMenuItem); mainStackPanel.Children.Add(stackPanelMenu); mainStackPanel.Children.Add(mainTextBox);

pasteMenuItem.Command = ApplicationCommands.Paste;

以上例子全是单条命令绑定的情形,事实上,你也可以多个按钮多条命令绑定到同一控件上,比如: <StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Orientation="Horizontal" Height="25"> <Button Command="Cut" CommandTarget="{Binding ElementName=textBoxInput}" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/> <Button Command="Copy" CommandTarget="{Binding ElementName=textBoxInput}" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/> <Button Command="Paste" CommandTarget="{Binding ElementName=textBoxInput}" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/> <Button Command="Undo" CommandTarget="{Binding ElementName=textBoxInput}" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/> <Button Command="Redo" CommandTarget="{Binding ElementName=textBoxInput}" Content="{Binding RelativeSource={RelativeSource Self}, Path=Command.Text}"/> <TextBox x:Name="textBoxInput" Width="200"/> </StackPanel>
最后,贴出一个完整点的例子:

XAML代码: <Window     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     x:Class="WPFCommand.Window1"     Title="MenuItemCommandTask"  x:Name="Window"  Width="500"  Height="400"     > <Window.CommandBindings>   <CommandBinding Command="ApplicationCommands.Open"                   Executed="OpenCmdExecuted"                   CanExecute="OpenCmdCanExecute"/> <CommandBinding Command="Help" CanExecute="HelpCanExecute" Executed="HelpExecuted" /> </Window.CommandBindings> <Window.InputBindings>   <KeyBinding Command="Help" Key="F2" />   <KeyBinding Command="NotACommand" Key="F1" /> </Window.InputBindings>     <Canvas>       <Menu DockPanel.Dock="Top">         <MenuItem Command="ApplicationCommands.Paste" Width="75" />       </Menu>       <TextBox BorderBrush="Black" BorderThickness="2" TextWrapping="Wrap" Text="这个TextBox未成为焦点之前,粘贴菜单不可用。" Width="476" Height="41" Canvas.Left="8" Canvas.Top="25"/>    <Button Command="ApplicationCommands.Open" Height="32" Width="223" Content="测试弹出对话框" Canvas.Left="8" Canvas.Top="70"/>     </Canvas> </Window>

对应的C#代码: using System; using System.IO; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Navigation;

namespace WPFCommand {  public partial class Window1  {   public Window1()   {    this.InitializeComponent();   }         void OpenCmdExecuted(object target, ExecutedRoutedEventArgs e)         {             MessageBox.Show("测试弹出对话框,命令已执行!");         }

        void OpenCmdCanExecute(object sender, CanExecuteRoutedEventArgs e)         {             e.CanExecute = true;         }
        void HelpCanExecute(object sender, CanExecuteRoutedEventArgs e)         {             e.CanExecute = true;         }

        void HelpExecuted(object sender, ExecutedRoutedEventArgs e)         {             System.Diagnostics.Process.Start("http://www.BrawDraw.com/");         }  } }

你不妨试试在程序执行之后,按下F1或F2试试效果,是不是按F2时浏览器指向"http://www.BrawDraw.com/",而按F1时没有任何效果?这是因为这两句:   <KeyBinding Command="Help" Key="F2" />   <KeyBinding Command="NotACommand" Key="F1" /> 当按F2时,Help命令执行;当按F1时,由于Command="NotACommand",即窗口忽略此命令的执行。

转载于:http://blog.csdn.net/johnsuna/article/details/1770602

ApplicationCommands用于表示应用程序程序员经常遇到的常见命令,类似于ctrl+c