C# precompile directive - use a variable to tell which code to compile

Question

I use a web service in a C# project. I test the project both online and on localhost. I have code like:

 //var proxy = new PanoNestWebsite.ScheduleImagePanonest.ScheduleImageProcessingClient();
 //var s = new ScheduleImagePanonest.ScheduleImageProcessing();
 var proxy = new ScheduleImageLocal.ScheduleImageProcessingClient();
 var s = new ScheduleImageLocal.ScheduleImageProcessing();

For example, If I want to deploy it online I uncomment the first two lines, and comment the last two.

But I have much more changes to make, and I don't like commenting and uncommenting all lines. How can I use proprocessing directives to define a variable like: IsLocal and I just set it to true to include the local code, or to false to include the server code? How can I write something like this?

You can use the [`#if` preprocessor directive](http://stackoverflow.com/questions/975355/ifdef-in-c-sharp); wrap your code in the appropriate block. — Cody Gray, Jan 07 '12 at 16:13

score 3 · Answer 1 · answered Jan 07 '12 at 16:15

If this is the kind of thing that you're dealing with, I'd recommend an alternative approach, possibly some IOC/DI where both of these classes implement an interface, and you configure in your app.config/web.config which type to point to it.

So instead of

var proxy = new ScheduleImageLocal.ScheduleImageProcessingClient();

you'd instead do

var proxy = IoCFactory.Resolve<IScheduleImagingProcessingClient>();

or something to that effect, however your library works.

If you use Unity, you would point the IScheduleImagingProcessingClient interface to a concrete type in your config file.

Mithrandir · Answer 2 · 2012-01-07T17:08:50.033

1

You can use the project properties to define values or #define SOME_KEY then:

#if KEY

    ... Code goes here

#endif

edited Jan 07 '12 at 17:08

answered Jan 07 '12 at 16:16

Mithrandir

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C# precompile directive - use a variable to tell which code to compile

2 Answers2