Visual Studio displaying errors even if projects build successfully in Razor html

7
votes

Intellisense not working for any razor html tags. Also showing Red line in all razor html tags (@Html.TexBox, @Html.DropdownList MultiSelect etc)

Three types error are showing in Visual Studio Error Window.

Error #1:

The type arguments for method 'System.Web.Mvc.Html.InputExtensions.TextBoxFor(System.Web.Mvc.HtmlHelper, System.Linq.Expressions.Expression>, System.Collections.Generic.IDictionary)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

Error #2:

One or more types required to compile a dynamic expression cannot be found. Are you missing references to Microsoft.CSharp.dll and System.Core.dll?

Error #3:

Error 40 The type arguments for method 'System.Web.Mvc.Html.InputExtensions.HiddenFor(System.Web.Mvc.HtmlHelper, System.Linq.Expressions.Expression>)' cannot be inferred from the usage. Try specifying the type arguments explicitly.

Please see the attached link for more information.

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4
c#asp.netasp.net-mvcrazor
Show us your code. We don't know what you did wrong if you don't show us what you did. - DPac
I've seen Intellisense get out of sync for Razor files. Usually closing and opening VS fixed it. Have you tried that? Also, it seems by default if there's an error in your view, it doesn't fail the build, so you have to manually notice these compilation issues. See my answer here for a resolution on that. - mason
Please see the the link link link - Rakin
I generally would restart VS, clean solution and finally rebuild. - Tez Wingfield
still problem persist - Rakin

4 Answers

6
votes

Problem solved deleted all the contents from the following folder.

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files

Thank you all for your time. :)

1
votes

You need to have following section in your web.config (Root should be fine)

    <system.web>
        <compilation debug="true" targetFramework="4.6.1">
            <assemblies>
                <add assembly="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
            </assemblies>
       </compilation>
    </system.web>

Replace System.Web.Helpers version as per your reference.

0
votes

That happens to me from time to time, usually rebuilding the project which contains the errors works for me. Did you try that?

Let me know.

0
votes

If the close and rebuild doesn't sort it I suspect there is an issue with your project file.

Create a new ASP.net web app and copy your files over. A bit of a pain but it will probably work.