MVC Razor helper does not exist in current context

Question

I have created a custom razor helper in my MVC4 Web application that I need to be usable in all of my views.

In all of my view pages, I can't seem to use my custom helper. VS2012 doesn't just see it.

How Can I resolve this please ?

EDIT: It actually works when I run the page, it's just VS that doesn't see it.

Here is my helper which is located in Helpers.cshtml within my AppCode folder.

@helper TextBox(string title, string id, string placeholder, bool required){    
<ul>
    <li>
        <label for="@id">@title</label>
    </li>
    <li>
        <input type="text" name="this" class="@if (@required) {<text>required</text>}" minlength="2" id="@id" placeholder="@placeholder" />
    </li>
</ul>
}

score 10 · Answer 1 · answered Jul 17 '13 at 14:48

10

Restart Visual Studio

Clean and rebuild alone was not enough but the steps that worked for me were:

Clean solution
Restart Visual Studio (2012)
Rebuild solution

After those steps, the Visual Studio Intellisense picked it up again.

answered Jul 17 '13 at 14:48

Rob

171
2
2

4

**TIP** If the folder was created, you really should Restart Visual Studio – Dan May 19 '15 at 19:01

score 6 · Answer 2 · answered Nov 30 '12 at 19:59

6

Try to build/rebuild the project (if your helper is in the App_Code folder).

Then VS will recognize the helper.

answered Nov 30 '12 at 19:59

Safeer Hussain

1,230
1
15
27

It was the solution to me. Thanks – Dan May 18 '15 at 21:38

score 5 · Accepted Answer · answered Sep 26 '12 at 12:04

5

If it is razor helper(using @helper syntax), you should define it in view placed within \App_Code

We can accomplish this by saving our @helper methods within .cshtml/.vbhtml files that are placed within a \App_Code directory that you create at the root of a project. For example, below I created a “ScottGu.cshtml” file within the \App_Code folder, and defined two separate helper methods within the file (you can have any number of helper methods within each file):

And if it is more traditional html helper, you should reference it, by adding record to namespaces element of <system.web.webPages.razor> defined in ~\Views\Web.Config. If you want to use it only in singe view, you could add @using directive on top of view.

answered Sep 26 '12 at 12:04

archil

39,013
7
65
82

VisualStudio seems to create some 'gobbledygook' class name that seems to look like my helper, but this still doesn't allow me access to any of the helper methods. – sacretruth Sep 26 '12 at 12:12
You should show the code then, because way described in my answer works – archil Sep 26 '12 at 12:28
You cannot call your helper like @Html.TextBox as that is razor helper, not html helper. You should call it as Darin Dimitrov suggested – archil Sep 26 '12 at 13:01
1

If it works in one environment and yells in another (i.e. production server), try this: http://stackoverflow.com/a/13597285/484108 – Phillippe Santana Sep 19 '16 at 17:12

score 1 · Answer 4 · answered Sep 26 '12 at 12:48

1

In any view you could call your custom Razor helper like this:

@Helpers.TextBox("some title", "someid", "default value", false)

This assumes that your helper is defined inside ~/App_Code/Helpers.cshtml.

answered Sep 26 '12 at 12:48

Darin Dimitrov

1,023,142
271
3,287
2,928

To be honest, I did this exactly before coming on stackoverflow. It actually works when I run the page, however, visual studio doesn't seem to recognise the helper. It comes out with a squiggly line underneath the call – sacretruth Sep 26 '12 at 13:40
Oh, you should have mentioned that. Razor Intellisense is far from perfect in Visual Studio. We can hope that they will improve it in future versions. – Darin Dimitrov Sep 26 '12 at 14:03

MVC Razor helper does not exist in current context

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