[RESOLVED] LINQ for converting IList<Role> to string array of Role.Name

[Krokonoster]

Hi,
The following work, but I'm pretty sure can be converted to a LINQ query, and been wasting time on it (Not necessary, but curiosity can be a killer sometimes)
(User got a member of type IList<Role> where Role have a member "RoleName")

public override string[] GetRolesForUser(string username)
{
    var roles = new StringBuilder();
    try
    {
        User user = UserRepository.GetUserByName(username, ApplicationName);
        if (user != null)
        {
            foreach (Role role in user.Roles)
            {
                roles.Append(role.RoleName + ",");
            }
        }
    }
    catch (Exception ex)
    {
        throw new MemberAccessException("Error processing role data - " + ex.Message);
    }
    if (roles.Length > 0)
    {
        roles.Remove(roles.Length - 1, 1);
        return roles.ToString().Split(',');
    }
    return new string[0];
}

Figured where I loop over the roles a query can do the job......no?

[AceInfinity]

Take the IList<Role> and use the Select in a lambda where you retrieve the .RoleName.

string[] NameArray = RList.Select(r => r.RoleName).ToArray();

RList as the IList<Role>

[Krokonoster]

Awesome, thanks!
Did not test it yet, but much shorter / more readable:

public override string[] GetRolesForUser(string username)
{
    try
    {
        User user = UserRepository.GetUserByName(username, ApplicationName);
        if (user != null)
            return user.Roles.Select(r => r.RoleName).ToArray();
    }
    catch (Exception ex)
    {
        throw new MemberAccessException("Error processing role data - " + ex.Message);
    }
    return new string[0];
}

[AceInfinity]

Enjoy, hope it works for what you're trying to do here

[Krokonoster]

Enjoy, hope it works for what you're trying to do here

Custom Membership and Role Providers using nHibernate.