MVC application crashes due to System.Web.Mvc not containing the html namespace [duplicate]

Question

Possible Duplicate:
The type or namespace name does not exist in the namespace ‘System.Web.Mvc’

When I compile my MVC4 project locally I receive the following error:

CS0234: The type or namespace name 'Html' does not exist in the namespace 'System.Web.Mvc' (are you missing an assembly reference?)

Line 25:         <add namespace="System.Web.Mvc" />
Line 26:         <add namespace="System.Web.Mvc.Ajax" />
Line 27:         <add namespace="System.Web.Mvc.Html" />    <--- this line
Line 28:         <add namespace="System.Web.Routing" />
Line 29:         <add namespace="System.Web.WebPages" />

What could be causing this? If I push the code to AppHarbor it builds and runs correctly

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– Kyeotic, Commented May 16, 2012 at 23:19
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– Matt Klein, Commented Sep 26, 2012 at 7:01

Nikhil · Accepted Answer · 2012-10-18 09:26:03Z

19

You also need to set the DLL reference as copy local.

edited Oct 18, 2012 at 9:26

Nikhil

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answered Oct 18, 2012 at 9:21

TheWim

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Rami Sarieddine · Accepted Answer · 2012-09-26 06:59:19Z

6

Try adding System.Web.Mvc namespace to the list of assemblies in the compilation section

<compilation debug="true">
    <assemblies>
       <add assembly="System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
    </assemblies>
</compilation>

answered Sep 26, 2012 at 6:59

Rami Sarieddine

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Comments

amarnath chatterjee · Accepted Answer · 2012-05-17 01:56:47Z

0

Not sure why is it coming , however you can try adding reference to this dll System.Web.Mvc.dll explicitly to your project. The System.Web.Mvc.Html resides in this assembly only.

answered May 17, 2012 at 1:56

amarnath chatterjee

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1 Comment

tamaslnagy Over a year ago

I'm not sure either. I ended up recreating a web api project and now it works. It might have been caused by web api not being officially supported by MonoDevelop/Mono yet.

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