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System.Web.Mvc missing reference to ModelClientValidationRule

I am trying to write some client validation in a class library. I added a link to System.Web.Mvc on my local machine here C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies\System.Web.Mvc.dll

, but I am getting the error

Could not find the type or namespace ModelClientValidationRule (are you missing a using directive or an assembly reference?)

I have targeted .Net Framework 4 and this MSDN link indicates it should be correct, so I'm a bit puzzled as to why the error is happening.

I am using VS2013 and have .Net 4.5 on my local machine, and have written client validation in other projects. I expect to be able to solve this problem by adding the MVC NuGet package, but I would like to explore the alternatives.

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2 answers


As long as the ModelClientValidationRule is in the System.Web.Mvc namespace, it is in the System.Web.WebPages assembly, so you need to reference that assembly as well.



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In addition to Nils answers, you might need to add the Microsoft.ASP.NET.MVC package from NuGet.



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