I believe I have followed the instructions on how to use the YUI compressor for .NET, but I keep getting an error that says it could not load CompressorTask.

error MSB4062: The "CompressorTask" task could not be loaded from the assembly C:\Project\src\Project.UI\bin\Yahoo.Yui.Compressor.Build.MsBuild.dll.  Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask

Here is my relevant xml..

<UsingTask TaskName="CompressorTask" AssemblyFile="Project\src\Project.UI\bin\Yahoo.Yui.Compressor.Build.MsBuild.dll" />

 <Target Name="Project" DependsOnTargets="Bridge;">

  <ItemGroup>
   <CssFiles Include="Project\src\Project.UI\Content\*.css" />

   <JavaScriptFiles Include="Project\src\Project.UI\Models\*.js" />
   <JavaScriptFiles Include="Project\src\Project.UI\Common\*.js" />
   <JavaScriptFiles Include="Project\src\Project.UI\Services\*.js" />
   <JavaScriptFiles Include="Project\src\Project.UI\ViewModels\*.js" />
   <JavaScriptFiles Include="Project\src\Project.UI\View\*.js" />
  </ItemGroup>
  <CompressorTask
            CssFiles="@(CssFiles)"
            DeleteCssFiles="false"
            CssOutputFile="Project\Scr\Project.UI\Content\css\Project.min.css"
            JavaScriptFiles="@(JavaScriptFiles)"
            JavaScriptOutputFile="Project\src\Project.UI\Scripts\Project.min.js"
            LoggingType="ALittleBit"
            />
 </Target>

Any suggetsions?

Thanks in advance,

Keith

Keith, one other thing to add to what Freeranger said :

I noticed that all your 'paths' were like this... Project\src\....

What this means is that the library will look for those places from the -current- location where the .dll exists. So this means, if the dll is in the \bin directory .. then it will try and look for ...YourMainProjectFolder\TheProject\src\Project.UI\bin\Project\src\... etc.

Try using C:\YourMainProjectFolder\TheProject\src\Project.UI\..... etc...

Hi,

I got the Yahoo.Yui.Compressor.Build.MsBuild.dll from NuGet. After compiling the project I see the following error

"D:\JsCssCompressor\JsCssCompressor\MsBuild\MsBuild.xml" (default target) (1) -
>
(MyTaskTarget target) ->
  D:\JsCssCompressor\JsCssCompressor\MsBuild\MsBuild.xml(76,5): error MSB4062:
The "CompressorTask" task could not be loaded from the assembly D:\JsCssCompres
sor\JsCssCompressor\bin\Yahoo.Yui.Compressor.Build.MsBuild.dll.  Confirm that t
he <UsingTask> declaration is correct, that the assembly and all its dependenci
es are available, and that the task contains a public class that implements Mic
rosoft.Build.Framework.ITask.

My XML file is below

**********************************************
<?xml version="1.0" encoding="utf-8"?>
<Project xmlns="http://schemas.microsoft.com/developer/MsBuild/2003">
  <UsingTask TaskName="CompressorTask"
             AssemblyFile="D:\JsCssCompressor\JsCssCompressor\bin\Yahoo.Yui.Compressor.Build.MsBuild.dll" />

  <Target Name="MyTaskTarget">
    <ItemGroup>
      <JavaScriptFiles Include="C:\Work\Purchase_Flow\eBizSol_App\Release\WebSites\Websites\McAfee.Consumer.Website\UIDesign\LegacySite\Scripts\FlexDashboard\AddDevice.js"/>
    </ItemGroup>
    <CompressorTask
        JavaScriptCompressionType="YuiStockCompression"
        JavaScriptFiles="@(JavaScriptFiles)"
        ObfuscateJavaScript="True"
        PreserveAllSemicolons="False"
        DisableOptimizations="Nope"
        EncodingType="Default"
        DeleteJavaScriptFiles="false"
        LineBreakPosition="-1"
        JavaScriptOutputFile="C:\Work\Purchase_Flow\eBizSol_App\Release\WebSites\Websites\McAfee.Consumer.Website\UIDesign\LegacySite\Scripts\FlexDashboard\MAA2.0.js"
        LoggingType="ALittleBit"
        ThreadCulture="en-us"
        IsEvalIgnored="false"
            />
  </Target>
</Project>

*********************************************

Any idea why I am getting the compilation error?.

Deepak

Hi Deepakkb.

ok the first thing i want to confirm with you are these things :-

1. Are you sure the file is located at : D:\JsCssCompressor\JsCssCompressor\bin\Yahoo.Yui.Compressor.Build.MsBuild.dll

2. What is the version of that file? Right click the file => properties =>Details

I'm getting the same error...

The file version for Yahoo.Yui.Compressor.Build.MsBuild is 2.0.0.0

The MsBuild version is following: -

Microsoft (R) Build Engine Version 4.0.30319.1
[Microsoft .NET Framework, Version 4.0.30319.269]
Copyright (C) Microsoft Corporation 2007. All rights reserved.

The sample project is in VS2010 and using .NET 4.0

Looks like exactly the same problem 94stangfan had, who started this thread.  The documentation on this site is out of date - PureKrome is working on updating it,

In the mean time, download the latest source code and look at the example web project included in that.  This example works and, if you run it, the web page provides some documentation on how it works. 

I could not download de example web project. My firewall said that there's a virus:

Accesss to the page has been denied 

because the following virus was detected 
Clamd: Heuristics.Broken.Executable

Strange - there are no executables in the source code download....

Ok, look at this source file directly:

http://yuicompressor.codeplex.com/SourceControl/changeset/view/78915#1293368

Hi freeranger,

After downloading the source code on my machine, when I run the following command, it works fine.

C:\Users\dbal.MCAFEE\Desktop\yuicompressor-78915\Documentation\MsBuild Example>m
sbuild.exe MsBuildSample.xml

The javascript and css files are getting compressed. I think the documentation needs to be updated on the web site about the msbuild.xml.

Deepak

Thanks for letting us know that works for you.  We are aware the documentation needs to be sorted....