/// <summary>
/// Evaluates if menu item should be visible to current user with access to <see cref="Roles"/>.
/// </summary>
/// <param name="parameter">
/// Data used by the <see cref="MenuCommand"/>. If the <see cref="MenuCommand"/> does not require
/// data to be passed, this object can be set to <c>null</c>.
/// </param>
/// <returns><c>true</c> if this <see cref="MenuCommand"/> can be executed; otherwise, <c>false</c>.</returns>
public bool CanExecute(object parameter)
{
SecurityPrincipal currentPrincipal = CommonFunctions.CurrentPrincipal;
ISecurityProvider securityProvider;
if (!SecurityProviderCache.TryGetCachedProvider(currentPrincipal.Identity.Name, out securityProvider))
{
securityProvider = SecurityProviderCache.CurrentProvider;
}
return(((object)securityProvider != null) && currentPrincipal.Identity.IsAuthenticated && securityProvider.UserData.Roles.Any() &&
(string.IsNullOrEmpty(Roles) || Roles == "*" || currentPrincipal.IsInRole(Roles)));
}