Why @User.IsInRole not working ?

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Hi ,

I installed Dotconnect PostgreSql with folowing this tutorial https://www.devart.com/dotconnect/postgresql/articles/aspproviders.html#role
All works fine, but when I call Admin role from View.cshtml with this operation : @User.IsInRole("admin") { } , after that showing error as "Operation is not Suppoorted".
But Rolemanager was enabled in web.config

Showing Exception that :

An exception of type 'System.InvalidOperationException' occurred in Devart.Data.PostgreSql.Web.dll but was not handled in user code

Additional information: Operation is not supported

How can I fix it ?

Thank you for your answer!

Posted 13-Aug-15 2:52am

Member 11901496

Updated 14-Sep-18 19:51pm

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Afzaal Ahmad Zeeshan · Answer 1 · 2015-08-13T03:17:00

If I am not missing anything that is a VB service, defined under Microsoft.VisualBasic.ApplicationServices[^], not an MVC one. However it is indeed executed like this, User.IsInRole(string)[^].

You can consider using the Authorize attribute and pass the role to it,

C#

[Authorize(Roles="Admin")]
public ActionResult YourAction() {
   // Action logic
}

This would do the trick for you and would allow admins only to access the content. Note that it is not applied to a content block, but to the action itself. And on a second thought, you may consider asking that framework developers for guidance on using this function in the application. They would have a solution to this problem as why is this function throwing an exception.

Otherwise, you may also use the Roles object and get the result for user,

C#

if(Roles.IsUserInRole("username", "role-name")) {
   // Content here
}

This approach is easy because it can be applied to a content block rather than entire action. Read more about Roles.IsUserInRole(string, string)[^] on MSDN.

Member 11901496 · Answer 2 · 2015-08-13T03:37:00

Solution 2

Hi Afzaal!

i tried this in my project but as well showing Exception that it not supported:(

C#

if(Roles.IsUserInRole("username", "role-name")) {
   // Content here
}

Posted 13-Aug-15 3:37am

Member 11901496

Comments

Afzaal Ahmad Zeeshan 13-Aug-15 11:14am

Then consider using the attribute in your application. If that still occurs then you would have to consider writing that to the library developer. They would let you know why are you getting the exception.

Ashok Borate · Answer 3 · 2018-09-14T19:52:00

Please check if you are initializing Identity provider with Role

C#

services.AddIdentity<IdentityUser,IdentityRole>()
            .AddEntityFrameworkStores<WebUserContext>()
            .AddDefaultTokenProviders();

Please note that AddDefaultIdentity accepts only IdentityUser and hence doesn't populate the Roles.

C#

services.AddDefaultIdentity<IdentityUser>()
            .AddEntityFrameworkStores<WebUserContext>()
            .AddDefaultTokenProviders();

Why @User.IsInRole not working ?

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