SecurityTrimming in mvc core menu

[Ehsan]

hi

im using asp.net mvc core app with telerik ui for mvc.

i need to use SecurityTrimming feature of menu for hiding unauthorized items...

<div class="nav navbar-nav">
               @(Html.Kendo()

                   .Menu()
                       .Name("headerMenu")
                       .SecurityTrimming(s => s.HideParent(true))
                       .Items(items =>
                       {
                           items.Add().Text("Index").Action("Index", "Home");
                           items.Add().Text("About").Action("About", "Home");
                           items.Add().Text("Contact").Action("Contact", "Home");
                       }
                       )
               )
           </div>

but i get this error:

Severity    Code    Description    Project    File    Line    Suppression State
Error    CS1061    'MenuBuilder' does not contain a definition for 'SecurityTrimming' and no extension method 'SecurityTrimming' accepting a first argument of type 'MenuBuilder' could be found (are you missing a using directive or an assembly reference?)    mvccoreapp..NETCoreApp,Version=v1.0    C:\Users\Desktop\practice\01-sample-project-fa\src\mvccoreapp\Views\Shared\_Layout.cshtml    38    Active

it seems that .SecurityTrimming(s => s.HideParent(true)) does not implemented in this version. i tested it with  kendo.mvc.2016.2.630-preview and Telerik.UI.for.AspNet.Core 2016.3.914

plz help,tnx

[Ianko]

Hello Ehsan,

Due to changes in the ASP.NET Core framework and how the Authentication is implemented the MVC5 implementation of the SecurityTrimming option became obsolete. 

You can submit this as a feature request on UserVoice, so that it is considered for implementation in a future release.

Regards,
Ianko
Telerik by Progress

[Ehsan]

hi

thanks,

is there any alternate solution?

[Ianko]

Hello Ehsan,

Basically, you can have your own function in the view that returns a boolean value and checks the autentication for a certain URL/Action. Here is a sample for such a function: http://stackoverflow.com/a/19393116/6255278. This example works for MVC4 and 5. For Core you might need some further improvements.  

Next, use the function in the Visible() method of the items in order to show or hide them based on the  authentication results returned. 

Ianko
Telerik by Progress