Showing an Administration ActionLink if Users are in an Admin Role

Question

I want to display an Admin ActionLink on my homepage if a user's role is 'Admin'. I have managed to get the roles configured correctly but I'm unsure how to do it.

So far I have implemented the following code into my HomeController:

        Function Admin() As ActionResult
        If Roles.IsUserInRole("Admin") Then
            Return View("Admin")
        Else
            Return View()
        End If
        End Function

I have then implemented the following ActionLink into my Site.Master:

<li><%: Html.ActionLink("Admin", "Admin", New With {.Controller = "Home"})%></li>

I know this isn't correct but it's not something I've done before so I'm not too sure how it can be implemented correctly.

Thanks for any help.

score 1 · Accepted Answer · answered Mar 12 '13 at 16:49

1

You write this code inside your view using razor, something like this:

Razor

@If User.IsInRole("Admin") Then
   <li>@Html.ActionLink("Admin", "Admin", New With {.Controller = "Home"})</li>
End if

ASPX

<% If User.IsInRole("Admin") Then %>
   <li><%: Html.ActionLink("Admin", "Admin", New With {.Controller = "Home"})%></li> 
<% End if %>

answered Mar 12 '13 at 16:49

Felipe Oriani

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what is the diff between razor and aspx? – Alex Gordon Mar 12 '13 at 16:52
Look it: http://stackoverflow.com/questions/6569809/mvc-3-aspx-vs-razor-view-engine – Felipe Oriani Mar 12 '13 at 16:54
I just had to change 'User.IsInRole' for 'Roles.IsUserInRole'and it worked fine. Thank you very much! – Mar 12 '13 at 17:03

score 0 · Answer 2 · answered Mar 12 '13 at 16:50

0

i am not familiar with VB.NET But you can do it by writing a custom Helper function as below:

 public static MvcHtmlString If(this MvcHtmlString value, bool evaluation)
    {
         return evaluation ? value : MvcHtmlString.Empty;
    }

so you can use this:

 @Html.ActionLink("Admin", "Admin").If(User.IsInRole("Administrator"))

answered Mar 12 '13 at 16:50

Bhushan Firake

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Thanks. Excuse my ignorance but I have never used custom helpers before. Where do I implement two sections? – Mar 12 '13 at 16:56
@David As you see, custom helper is nothing but an extension method , so you will need to put it anywhere but in a static class (`HelperExtensions` may be)...and you can use it on any view page by just importing the namespace in which the static class is put... – Bhushan Firake Mar 12 '13 at 16:58

Showing an Administration ActionLink if Users are in an Admin Role

2 Answers2