Compressing CSS with YUI Compressor for .Net

Share This

It is a very common task to minimize JavaScript before deploying your application to production environment.
But it is impossible to debug JavaScript while using minified files.
The best solution is to minimize JS files while building release version and in this atricle I’ll show you how to use YUICompressor.NET in MSBuild task and run it as build event in your project.

Step 1. Get a YUICompressor.NET

It’s very easy: just go to YUICompressor .NET codeplex page and get most recent version.

Step 2. Write MSBuild task

It is also a very common task: all you have to do is to use build task called CompressorTask from YUICompressor.NET assembly^

<?xml version="1.0" encoding="utf-8" ?>
<Project xmlns="">
  <UsingTask TaskName="CompressorTask" AssemblyFile="..packagesYUICompressor.NET." />

Then we need to tell MSBuild to run our task on js files, that need to be minified:
And let’s not forget to run minification task only on Release configuration:

  <Target Name="CareToCare_JS_CSS_Minification" Condition="'$(Configuration)'=='Release'">
      <CssFiles Include="$(MSBuildProjectDirectory)PublicStyles*.css"  />
      <CssFiles Include="$(MSBuildProjectDirectory)PublicStylesthemesbase*.css"  />

The last thing left: run CompressorTask with required arguments.
See Codeplex docs for details about these settings.


Okay, now we have our task. Save it as .xml file (for example BuildConfig.xml) and let’s attach this task to our project, so MSBuild will run it while building project.

FYI: VisualStudio also uses MSBuild to build projects and solution. So, out solution will work with VisualStudio and plain MSBuild (on integration server, for example) as well.

To ass task to project, go to your project settings (Right click ->Proterties), pick Build Events section and paste following to “Post-build event command line”:

$(MSBuildBinPath)msbuild.exe /p:Configuration=$(ConfigurationName) "$(ProjectDir)BuildConfig.xml"

That’s it! Now when you’ll build your project with Release configuration, your .js files will be minified.

One Response to “Compressing CSS with YUI Compressor for .Net”

  1. Segi says:

    Hi, How can we apply YUICompresser.NET in website ?
    As I can’t find Build Event Section ?

Leave a Reply

Recent Revive AdServer (Formerly OpenX Source) Expandable Banners

Revive AdServer (Formerly OpenX Source)  Expandable Banners The following example demonstrates a 600px by 150px banner served by Revive AdServer (Formerly OpenX Source)  and expanded to 600px by 300px on rollover. The flash creative can be either uploaded to creatives directory directly (FTP) or just as an another Revive AdServer (Formerly OpenX Source)  banner (preferred). When uploading the SWF creative, you do not need to replace any hardcoded URLs or indicate a destination URL – that would be done in the HTML banner setup. Essentially, we are just using it as a storage container for our creative, all impressions and clicks will be … read more

 Twitter  LinkedIn  Google+  Skype RSS

Get in Touch

  • r Phone:
    (416) 877 2844 / (647) 258 4847
  • h Email:
    [email protected]
  • m Address:
    1454 Dundas St. East, Suite 124
    Mississauga, Ontario
    L4X1L4, Canada

Any Questions?