How to list users with role names in ASP.NET MVC 5

Question

I have default project template of ASP.NET MVC 5 web site and I am trying to list all users with role names (not IDs).

The query is:

db.Users.Include(u =         


        

Answer 1

The way I do it is:

using (var userManager = new UserManager(new UserStore(new ApplicationContext()))
{
    var rolesForUser = await userManager.GetRolesAsync(userId);

   // rolesForUser now has a list role classes.
}

The identity team made two managers: RoleManager for sorting out roles (not user roles though) and UserManager basically for everything authentication wise. There is also a SignInManager as well but not needed.

So UserManager finds users, creates users, deletes users, sends emails .... the list goes on.

So my Action could look like this:

    public async Task GetRolesForUser(string userId)
    {
        using (
            var userManager =
                new UserManager(new UserStore(new ApplicationDbContext())))
        {
            var rolesForUser = await userManager.GetRolesAsync(userId);

            return this.View(rolesForUser);
        }
    }

To execute raw SQL then you can do something like this:

Create the class that Entity Framework can map to, based on the output of your query:

public class UserWithRole
{
    public string UserName {get;set;} // You can alias the SQL output to give these better names
    public string Name {get;set;}
}

using (var context = new DbContext())
{
    var sql = @"
                SELECT AspNetUsers.UserName, AspNetRoles.Name 
                FROM AspNetUsers 
                LEFT JOIN AspNetUserRoles ON  AspNetUserRoles.UserId = AspNetUsers.Id 
                LEFT JOIN AspNetRoles ON AspNetRoles.Id = AspNetUserRoles.RoleId
                WHERE AspNetUsers.Id = @Id";
    var idParam = new SqlParameter("Id", theUserId);

    var result = context.Database.ExecuteQuery(sql, idParam);
}

Pretty simple!

If you alias your SQL return columns:

SELECT AspNetUSers.UserName, AspNetRoles.Name As RoleName

Then your DTO class can look like this:

public class UserWithRole
{
    public string UserName {get;set;}
    public string RoleName {get;set;}
}

Which is obviously a lot cleaner.