richard-slater.co.uk

Changing code accessibility modifiers quickly

I have two hints today both of them involving changing accessibility modifiers. The first is a feature of CodeRush that I accidentally discovered while testing out the Visual Studio 2010 Productivity Power Tools the second is a great new feature of Visual Studio 2010.

For those who don’t know what I mean by accessibility modifiers, those are the keywords you put before blocks of code that define how that code can be accessed, this is all enforced by the compiler giving you nice compiler error messages if you violate these rules. To provide an example the following auto-properties are all have the accessibility modifier “public”:

[Column] public string Name { get; set; }
[Column] public string Description { get; set; }
[Column] public decimal Price { get; set; }
[Column] public string Category { get; set; }

CodeRush gives you a handy way to change the User interface by clicking the icon to the left of the code block, you then get a set of actions you can perform upon the that block of code.

As with most everything in CodeRush you can access this functionality from the keyboard anywhere within the scope of that code block by pressing Alt + Up or Alt + Down to cycle through the five possibilities:

• public
• internal
• protected internal
• protected
• private

This means that if you need to change access modifiers, either to tighten up or relax the access points into your code you can do it by pressing a hand full of keys (between two and six to be exact), much faster than navigating to the top of the method highlighting and replacing the keyword.

My second hint is something that I have been using quite regularly, lets take the above example again:

[Column] public string Name { get; set; }
[Column] public string Description { get; set; }
[Column] public decimal Price { get; set; }
[Column] public string Category { get; set; }

I want to change all four fields to “be internal”, I could go in and change each one manually or better still use the above keyboard shortcuts (Alt + Down, Down, Alt + Down, etc.) the faster alternative would be to hold down the Alt key then select from the first character of the first “public” to the last character of the last “public” keyword.

While holding down Alt traditional selection behaviour is not followed and only the “public” keywords are selected on all four lines:

You can then type your new visibility modifier overwriting the selected components of all four lines in one fell swoop:

[Column] internal string Name { get; set; }
[Column] internal string Description { get; set; }
[Column] internal decimal Price { get; set; }
[Column] internal string Category { get; set; }

I think that is neat!

Posted in CodeRush, Programming | No Comments »

Finding Code Issues

As programmers we are well known for writing bug free perfectly formed code first time round, as such I don’t really understand why DevExpress implemented the code issues feature… no wait… that should be the other way round.

CodeRush has several ways to access the Code Issues user interface, first off there is the thin file overview down the right hand side of the viewport. In the code itself there are handy contextual hints too.

In this example, “this.” is redundant and has been greyed out, if you hover over it it will tell you more about the issue and how to resolve it. Different issues have different notation so code that is to be transformed will have a coloured underline.

In the process of going though a file created by someone else the code style was a bit off – I was able to quickly bring it in line with the project preferences by using the shortcut keys Alt + PageDown to skip between the issues then Ctrl + ‘ to fix the issues quickly.

Great feature for spotting mistakes as you code, and also for learning new language features as they are introduced into the specification.

Posted in CodeRush, Programming | No Comments »

Controling Code Outlining with the Keyboard

Code outlining is a feature of supported by Visual Studio and many other editors, MSDN has some good documentation for VS2005, VS2008 and VS2010. If I were asked to explain this as briefly as possible, I would probably say:

Code Outlining is the logical partitioning of code in such a way that the user interface, or editor, is able to selectively hide the body of the content (such as a class, struct, enum or method) whilst leaving the signature or some identifying comment visible.

You can see this in action in Visual Studio 2008 with the following Screenshot:

I accidentally turned off Code Outlining today by hitting some keyboard shortcut that I didn’t know how to reverse, this lead me to discover several useful keyboard shortcuts for managing the display of your code from the keyboard.

As it turns out I managed to hit Ctrl-M followed by Ctrl-P (or just P in fact) which maps to Edit.StopOutlining, by default it seems that the Visual C# 2005 mapping scheme doesn’t provide a shortcut to enable Automatic Outlining so instead you can access the command through Edit Menu -> Outlining -> Start Automatic Outlining.

Enabled again, I get to play with code outlining from the keyboard:

• To toggle (collapse an expanded block or expand a collapsed block) the closest outlined element use Ctrl-M followed by Ctrl-M.
• To toggle everything use Ctrl-M followed by Ctrl-L (I find little use for this)
• To collapse to definitions use Ctrl-M followed by Ctrl-O

The last one is the most useful when used in conjunction with Regions as after colapsing to definitions you will get something similar to this:

You might have noticed in the first screenshot that CodeRush Xpress adds a coloured line between the beginning and end of blocks of code, this is a nice feature if you have long blocks of code, which of course you shouldn’t have.

There we go, an errant key stroke can lead to learning and blogging, who would have thought it?

Posted in CodeRush, Programming | No Comments »

Adjusting Selections in CodeRush Xpress

I found this function totally accidentally when I knocked my mouse into a key when something interesting popped up on Twitter. I happened to have a variable selected like so:

The key that I knocked was the Number Pad “+” key, and it expanded the selection like this:

As any self respecting Systems Administrator would do I wondered if doing exactly the same thing repeatedly would have equal or compound effects.

Strangely enough it worked, the selection will continue to expand selecting increasingly larger sections of code. The reverse works as well if you press the Number Pad “-” key the selection will be reduced.

As I was looking for documentation on this function; I found that you could use the CamelCase select function to start selections off using Ctrl+Shift+Left (or Ctrl+Shift+Right) this will take your selection from the current cursor position to the next upper case character to the left (or right). This can be coupled with the Number Pad “+” to expand your selection from a variable to an expression, to a line then a block. Neat!

Each of these discoveries was announced with a handy little popup in the bottom right hand corner of the viewport telling me what happened, and if relevant what function was suppressed.

I am going to make a concerted effort to spend my lunch break watching some more videos on DevExpress’ training site. I got 10 minutes today and watched what appeared to be footage from a launch event or a conference which was interesting but didn’t really teach me anything specifically.

Posted in CodeRush | 2 Comments »

Find Files in CodeRush Xpress

As I mentioned in my previous entry I have started using DevExpress’s CodeRush Xpress. It is a free cut down version of CodeRush that I heard about in an episode of .NET Rocks. I have wanted add something to my Visual Studio development experience and I can’t justify the cost of either Resharper or CodeRush at the moment. There has been quite a bit of discussion about Resharper vs. CodeRush and in my experience most people I have spoken to love one and hate the other.

I hope to be able to write a series of posts about some of the features found in CodeRush Xpress which I hope will clarify their purpose and use in my mind and maybe help someone find the function they are looking for.

First off “Quick File Navigation”, this is a search function for locating a file by file name, I am finding it increasingly useful when looking through patches as it allows me to very quickly jump to a file name. Particularly as I am trying to move my projects to a one class per file so if I can remember the class name I can find the code file very quickly.

The “Quick File Navigation” dialog is accessible through the keyboard short cut Ctrl+Alt+F. Typing will filter the list box by the name of the file matching anywhere in the filename including the extension.

An additional feature for those who like me use CamelCase in their file names; if you enter your filter terms in capital letters it will search for capitalized words, in order within file names. Thus entering “AW” into the search box will also bring up the AboutWindow.cs in the above solution.

Combining the above with the Ctrl-G keyboard shortcut in Visual Studio 2008 to go to a specific line we can do the following to go to line 162 in ShipLoadoutSelectWindow.cs:

Ctrl+Alt+F  →  S,L,S,W  →  Ctrl+G →  1,6,2

DevExpress have a great training video on their tv.devexpress.com sub site.

Posted in CodeRush | 1 Comment »