How To Add Role Id to Models

Question

I have gotten the role id of the user and I want to update another model that contains a column for roleid but it always says can not convert generic list to string and I convert the gotten role id to string but do not get the value and I want to add it to the model.

This is what I have so far

var role = await _userManager.GetRolesAsync(user); 
var roleIds = _roleManager.Roles
    .Where(r => role.AsEnumerable().Contains(r.Name))
    .Select(r => r.Id)
    .ToList();

This is the exception code. When I change to ToString that do not get any value

var roleIds = _roleManager.Roles
    .Where(r => role.AsEnumerable().Contains(r.Name))
    .Select(r => r.Id)
    .ToString(); 

userEmployee.Stations.Add(new Models.AppModel.StaffStation { RoleId = roleIds })

     

And I only want to update not even create new. I am new to .net

Answer 1

continuous on Fabio's answer you can check if the user in the role before adding to your model as below

     //Get All User Roles
        var userRoles = roleManager.Roles.Where(r => role.AsEnumerable().Contains(r.Name));

        //Loop on All User Roles
        foreach (var userRole in userRoles)
        {
            //Check if User not in role so we will add it
            if(!await userManager.IsInRoleAsync(user, userRole.Name))
            {
                var station = new Models.AppModel.StaffStation { RoleId = userRole.Id };
                userEmployee.Stations.Add(station);
            }
            else
            {
                //here you can check if you don't need this role for this user anymore so delete it
                //or keep it as is
            }
            
        }