Visual Studio Hacks

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Chapter 12, Extending Visual Studio

#89 Writing a Visual Studio Add-in

HACK

Write the Code

The next step is to write the code that will do the work of the add-in. In this

example, I will be writing a simple piece of code that surrounds the selected

text with a

try...catch block. This code needs to be added to the Exec

method that was added for you by the wizard. Here is a look at the default

code:

public void Exec(string commandName,

EnvDTE.vsCommandExecOption executeOption,

ref object varIn, ref object varOut, ref bool handled)

{

handled = false;

if(executeOption = =

EnvDTE.vsCommandExecOption.vsCommandExecOptionDoDefault)

{

if(commandName = = "TryCatchMatic.Connect.TryCatchMatic")

{

handled = true;

return;

}

}

}

This code first checks the executeOptions and then checks to see if the com-

mand being called is the command for this add-in. Inside the last

if state-

ment is where you will write the code for what your add-in will actually do.

Here is the code I have added to get the currently selected text and then sur-

round it with a

try...catch block:

if(commandName = = "TryCatchMatic.Connect.TryCatchMatic")

{

string selectedText = textDoc.Selection.Text;

string newText = "try\n { \n" + selectedText

+ "\n}\ncatch\n{\n}";

textDoc.Selection.Text = newText;

handled = true;

return;

}

In this code, I get a reference to the ActiveDocument and then get the selected

text. I can then replace the selected ...