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Asp.Net MVC in Visual Studio 11 Beta - Not Working RSS

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Last post Feb 29, 2012 10:34 PM by Jon_ProactiveLogic

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Jon_Proactiv...

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Asp.Net MVC in Visual Studio 11 Beta - Not Working

Feb 29, 2012 09:40 PM|LINK

(I submitted this on the Visual Studio Forum, I think it might be better here)

Hi,

I installed VS.NET 11 Beta, created a new MVC project and I get the following error:

---------------------------

Microsoft Visual Studio
---------------------------
The Web project 'MvcApplication1' requires missing web components to run with Visual Studio. Would you like to download and install them using the Web Platform Installer now?
(Note: Some components might require restart to take effect.)

ASP.NET Web pages with Razor syntax 1.0.0.0
---------------------------
Yes No
---------------------------

Attempting to download via the web installer fails (everything I read says the Beta should already have these components).

In addition I opened an existing project Asp.Net MVC project that runs under IIS, and I receive the following error:

Compiler Error Message: CS0433: The type 'System.Web.WebPages.HelperPage' exists in both 'c:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.WebPages\v4.0_2.0.0.0__31bf3856ad364e35\System.Web.WebPages.dll' and 'c:\Windows\Microsoft.NET\assembly\GAC_MSIL\System.Web.WebPages\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.dll'

I tried uninstalling the Beta (and Developer Preview), and reinstalling the Beta as admin. Nothing seems to work, I still get the same errors above.

I was able to run the second project previously in the Developer Preview.

Help is appreciated!

Thanks,
Jon
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ignatandrei

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Re: Asp.Net MVC in Visual Studio 11 Beta - Not Working

Feb 29, 2012 10:06 PM|LINK

Jon_ProactiveLogic
I opened an existing project Asp.Net MVC project that runs under IIS

read the release notes

http://www.asp.net/whitepapers/mvc4-release-notes#_Toc303253806

My .NET blog : http://msprogrammer.serviciipeweb.ro/ |2012 Programmer tools
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Jon_Proactiv...

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Re: Asp.Net MVC in Visual Studio 11 Beta - Not Working

Feb 29, 2012 10:34 PM|LINK
Thank you!

I am able to run my project after doing this the steps below from the release notes, but I still get the message stating: "The Web project 'MvcApplication1' requires missing web components to run with Visual Studio. Would you like to download and install them using the Web Platform Installer now?"

At least I can run my project now though so many thanks!!!
- Installing ASP.NET MVC 4 Beta breaks ASP.NET MVC 3 RTM applications.ASP.NET MVC 3 applications that were created with the RTM release (not with the ASP.NET MVC 3 Tools Update release) require the following changes in order to work side-by-side with ASP.NET MVC 4 Beta. Building the project without making these updates results in compilation errors.
  Required updates
```
<appSettings>
    <add key="webpages:Version" value="1.0.0.0"/>
    <add key="ClientValidationEnabled" value="true"/>
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
</appSettings>
```
  1. In Solution Explorer, right-click the project name and then select Unload Project. Then right-click the name again and select Edit ProjectName.csproj.
  2. Locate the following assembly references:
    
    <Reference Include="System.Web.WebPages"/>
    <Reference Include="System.Web.Helpers" />
    
    Replace them with the following:
    
    <Reference Include="System.Web.WebPages, Version=1.0.0.0,
    Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL "/>
    <Reference Include="System.Web.Helpers, Version=1.0.0.0,
    Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
  3. Save the changes, close the project (.csproj) file you were editing, and then right-click the project and select Reload.