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13: Extending Visual Studio 2010
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As you may recall, the OnConnection method assigned the main application object to _applicationObject, a field of the Connect class This is important because now you have access to the main application object, and you ll see how it s used in the next section, which shows you how to execute your Add-In via the Exec method
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Implementing the Exec Method
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Whenever a user starts your Add-In, VS calls the Exec method of the IDTCommandTarget interface The Exec method is important because that s where you add your code to implement the behavior of your Add-In The previous sections discussed code that is generated by VS, but Listing 13-3 contains code for the Exec method that you should enter yourself to make the KeystrokeFinder Add-In work The purpose of the Add-In for this section is to list all VS commands and their associated shortcut keys The list of commands and shortcuts will be displayed in the VS Output window Listing 13-3 shows the Exec method for the KeystrokeFinder Add-In
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Listing 13-3 Implementing the Exec method
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public void Exec( string commandName, vsCommandExecOption executeOption, ref object varIn, ref object varOut, ref bool handled) { handled = false; if(executeOption == vsCommandExecOptionvsCommandExecOptionDoDefault) { if (commandName == "KeystrokeFinderConnectKeystrokeFinder") { OutputWindow outWin = _applicationObjectToolWindowsOutputWindow; OutputWindowPane outPane = outWinOutputWindowPanesAdd( "Keyboard Shortcuts"); outPaneActivate(); foreach (Command cmd in _applicationObjectCommands) { object[] cmdBindings = cmdBindings as object[];
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Microsoft Visual Studio 2010: A Beginner s Guide
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if (cmdBindingsLength > 0) { string bindingStr = stringJoin(", ", cmdBindings); outPaneOutputString( "Command: " + cmdName + ", Shortcut: " + bindingStr + "\n"); } } handled = true; return; } } }
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Public Sub Exec( ByVal commandName As String, ByVal executeOption As vsCommandExecOption, ByRef varIn As Object, ByRef varOut As Object, ByRef handled As Boolean) Implements IDTCommandTargetExec handled = False If executeOption = vsCommandExecOptionvsCommandExecOptionDoDefault Then If commandName = "KeystrokeFinderVBConnectKeystrokeFinderVB" Then Dim outWin As OutputWindow = _applicationObjectToolWindowsOutputWindow Dim outPane As OutputWindowPane = outWinOutputWindowPanesAdd( "Keyboard Shortcuts") outPaneActivate() For Each cmd As Command In _applicationObjectCommands Dim cmdBindings As Object() = CType(cmdBindings, Object()) If cmdBindingsLength > 0 Then Dim bindingStr As String = StringJoin(", ", cmdBindings)
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13: Extending Visual Studio 2010
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outPaneOutputString( "Command: " & cmdName & ", Shortcut: " & bindingStr & EnvironmentNewLine) End If Next handled = True Exit Sub End If End If End Sub
The executeOption parameter of Exec allows you to determine whether you want to prompt the user for input, perform the action, or show help, which are options of the vsCommandExecOption All you need to do is check the option and perform the operation for the current value of executeOption In the current Add-In, we only check for vsCommandExec OptionDoDefault, which means to just perform the operation: C#:
if(executeOption == vsCommandExecOptionvsCommandExecOptionDoDefault)
If executeOption = vsCommandExecOptionvsCommandExecOptionDoDefault Then
The example in this chapter only has one command, but you could potentially have multiple commands if you decided to add more commands in the OnConnection method Add an if statement to ensure you re executing code for the proper command, such as the following code: C#:
if (commandName == "KeystrokeFinderConnectKeystrokeFinder")
If commandName = "KeystrokeFinderVBConnectKeystrokeFinderVB" Then
Microsoft Visual Studio 2010: A Beginner s Guide
As you learned earlier, the application object is the starting point for accessing all VS objects Since we need to write to the Output window, the code accesses the ToolWindows property of the application object, which provides access to multiple VS windows The following code obtains a reference to the OutputWindow, adds a new pane, and activates the pane: C#:
OutputWindow outWin = _applicationObjectToolWindowsOutputWindow; OutputWindowPane outPane = outWinOutputWindowPanesAdd( "Keyboard Shortcuts"); outPaneActivate();
Dim outWin As OutputWindow = _applicationObjectToolWindowsOutputWindow Dim outPane As OutputWindowPane = outWinOutputWindowPanesAdd( "Keyboard Shortcuts") outPaneActivate()
Going back to the application object, we need to access the Commands collection, using a foreach loop to access each Command object Each command name is in the Name property The Bindings property is a collection of shortcut keys for the command Some commands have no shortcut keys, as indicated by an empty Bindings collection (its Length property will be set to 0), so we skip them The following code shows how to iterate through all VS commands and print each command name and associated shortcut keys to the Output window: C#:
foreach (Command cmd in _applicationObjectCommands) { object[] cmdBindings = cmdBindings as object[]; if (cmdBindingsLength > 0) { string bindingStr = stringJoin(", ", cmdBindings); outPaneOutputString( "Command: " + cmdName +
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