Question

I have a RadioButtonList “chklRoles” which has 4 buttons. I want to update database aspnet_UserInRoles if I select a role. But it seems that the Aspnet Membership Provider doesn’t have an update method. How can I do it?

 protected void chklRoles_SelectedIndexChanged(object sender, EventArgs e)
    {
        foreach (string role in Roles.GetRolesForUser(userName))
        {
            if (chklRoles.Items.FindByText(role).Selected == true)
            {  
                // update role;
               // Roles.DeleteRole("origin_role");
               //  Roles.AddUserToRole(userName, role);
            }
        }
    }

Edit: I think that to delete it and add it with a new role maybe an option. But please give me an advice.
update: each user only can have one role. What I want is how to switch roles by clicking the radio button. Update meants a new role will replace the older role.

Answer 1

You can use the RoleProvider to add or remove roles from a user. You’ll have to determine what roles are to be added and/or removed. That would look something like this:

protected void chklRoles_SelectedIndexChanged(object sender, EventArgs e)
{
    var current = Roles.GetRolesForUser(userName);
    var added = new List<string>();
    var removed = new List<string>();

    // go over all the roles to build the lists 
    foreach (string role in Roles.GetAllRoles())
    {
        if (chklRoles.Items.FindByText(role).Selected && !current.Contains( role ))
        {  
            added.Add( role );
        }
        else if( current.Contains( role ) )
        {
            removed.Add( role );
        }
    }
    // apply changes if needed
    if( added.Count > 0 )
    {
       Roles.AddUsersToRoles( new[]{userName}, added.ToArray());
    }
    if( removed.Count > 0 )
    {
        Roles.RemoveUsersFromRoles(new[]{userName}, removed.ToArray());
    }
}

Note that I haven’t had a chance to check this code thoroughly.