Role selector 
TheRole selector enables you to display a list of all existing roles defined in your website. You can use the selector in the frontend or backend of your site. For example, you can use the selector on a page or in a widget designer.
For more information about roles in Sitefinity CMS, see Overview: Roles. 
To add a Roles selector, in your DesignerView.YourView.cshtml file, place one of the following tags anywhere in the HTML code:
Single item selection:
Multiple items selection:
The values of the attributes are scope properties that you define in the MVC widget controller.
    
    
        
            | Attribute | Description | 
        
            | sf-selected-item-id | Single select only. Stores the ID of the selected item. | 
        
            | sf-selected-item | Single select only. Stores the serialized information of the selected item. | 
        
            | sf-selected-ids | Multi select only. Stores the IDs of the selected items. | 
        
            | sf-selected-items | Multi select only. Stores the serialized information of the selected items. | 
        
            | sf-provider | Configures the provider to use when retrieving the items to display. |