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Best way to find the user roles

Posted on 2007-11-21
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Last Modified: 2013-12-16
Hi,
(ASP.NET, C#)
I have created login page with Active Directory. It is working good.

Now, once the user login, I would like to find out their userrole, for example, if the user is "Admin" or "User".

I would like to achieve this through active directory.. How do I acheive this... (if I can create a new group in the Active Directory??)
or can I create a table in my database and keep track of their userroles ...

Thanks..
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Question by:neonlights
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Accepted Solution

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Bob Learned earned 1000 total points
ID: 20328344
There is this:

User.IsInRole("Admin")

Bob
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Expert Comment

by:raterus
ID: 20328613
Do what Bob says, however I would suggest you also include your domain.  I've ran into problems in the past when I didn't include this.

User.IsInRole("SOMEDOMAIN\Admin")
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Expert Comment

by:Bob Learned
ID: 20328642
Thank you, Michael.

It's a good thing that I have someone who is really to catch my oversights *WINK*.

Bob

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LVL 33

Expert Comment

by:raterus
ID: 20328721
A very rare event indeed, usually when I follow behind Bob I find out something I didn't ever know.
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Author Comment

by:neonlights
ID: 20329940
Michael and Bob - Thanks...
I agree with Michael about Bob... "A very rare event indeed" ;-)

How do I know "Admin"?

Is this information coming from the Active Directory? I am new to Active Directory...
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Author Comment

by:neonlights
ID: 20329951
since we have many groups.. do I have to create one more group...

and assign certain users to be "Admin" and Others to be "Users"?

Thanks again..
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Expert Comment

by:raterus
ID: 20329960
"Admin" here would be the group name you've created in Active Directory.  You would need to know this before hand.

You, of course, can get a list of all groups the user is in, but this gets much trickier to code.
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Expert Comment

by:Bob Learned
ID: 20329977
Here is some useful ActiveDirectory code:

using System.Collections.Generic;
using System.DirectoryServices;
using System.Collections;
 
public class ActiveDirectoryGroups
{
 
  public static List<string> GetUserRoles(string userContainerPath, string userName, string adminAccount, string adminPassword)
  {
    string userFilter = string.Format("(&(objectCategory=person)(sAMAccountName={0})", userName);
    List<string> roles = new List<string>();
 
    using (DirectoryEntry entry = new DirectoryEntry(userContainerPath, adminAccount, adminPassword, AuthenticationTypes.None))
    {
      using (DirectorySearcher searcher = new DirectorySearcher(entry, userFilter))
      {
        SearchResult result = searcher.FindOne();
        IEnumerable groups = (result.Properties["memberOf"]) as IEnumerable;
        if (groups != null)
          foreach (string dn in groups)
            roles.Add(dn);
      }
    }
 
    return roles;
 
  }
 
}

Open in new window

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Author Comment

by:neonlights
ID: 20329980
I know how to find list of all groups:
I would like to assign one or two users to be "Admin" - they can change some data in the application..

I am kind of confused with "Admin"

        public String GetGroups()
        {
            DirectorySearcher search = new DirectorySearcher(_path);
            search.Filter = "(cn=" + _filterAttribute + ")";
            userLoginName = _filterAttribute;
           
            search.PropertiesToLoad.Add("memberOf");
            StringBuilder groupNames = new StringBuilder();

            try
            {
                SearchResult result = search.FindOne();

                int propertyCount = result.Properties["memberOf"].Count;

                String dn;
                int equalsIndex, commaIndex;

                for (int propertyCounter = 0; propertyCounter < propertyCount; propertyCounter++)
                {
                    dn = (String)result.Properties["memberOf"][propertyCounter];

                    equalsIndex = dn.IndexOf("=", 1);
                    commaIndex = dn.IndexOf(",", 1);
                    if (-1 == equalsIndex)
                    {
                        return null;
                    }

                    groupNames.Append(dn.Substring((equalsIndex + 1), (commaIndex - equalsIndex) - 1));
                    groupNames.Append("|");

                }
            }
            catch (Exception ex)
            {
                throw new Exception("Error obtaining group names. " + ex.Message);
            }
            return groupNames.ToString();
        }
    }
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LVL 96

Expert Comment

by:Bob Learned
ID: 20330015
>>I am kind of confused with "Admin"
Wherein lies your confusion (I am confused)?

Bob
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LVL 33

Expert Comment

by:raterus
ID: 20330026
It sounds like you just need to open up "Active Directory Users and Groups", find the group, and add some users to it.
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Author Comment

by:neonlights
ID: 20330099
Thanks Bob for your code.

ok..

Let's say I create a new group called "MyApplicationX" and I will add 15 users to this group.

Then, in that group, I will give 2 users as Admin...

Then, from my login.aspx, I can get all the people belongs to "MyApplicationX" group and can check for User.IsInRole("SOMEDOMAIN\Admin")? right?

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LVL 33

Assisted Solution

by:raterus
raterus earned 1000 total points
ID: 20330147
You can't add an extra "Admin" option to users in a group, without hacking up your active directory schema (and you don't want to do that).

I would just create at most two groups here,

MyApplicationX
MyApplicationX_Admins

You can check the membership of these two groups to control access to your application.
0
 

Author Comment

by:neonlights
ID: 20330168
and one more question: Let's say I have created a table in my database, and I added all those 15 users in there.. and then, I  give them manually what kind of permission they have... Can I use it then? like this...

If get the value GetUserRoles, can I assign that to User.IsInRole("SOMEDOMAIN\" + GetUserRoles)?
I am new asp.net and c#.. please be patient.. if II make silly mistakes.
thanks again...

        public string GetUserRoles()
        {
            String SqlString;
            string connectionString;

           
            connectionString = ConfigurationManager.ConnectionStrings["AM"].ConnectionString.ToString();
            if ((connectionString == null))
            {
                throw new ProviderException("Connection string cannot be blank.");
            }

            SqlString = "Select [UserRole] From TblEmployee Where ";
            SqlString = SqlString + " (EmployeeName = @EmployeeName)";
            OleDbConnection oleDbConnection = new OleDbConnection(connectionString);
            OleDbCommand oleDbCommand = new OleDbCommand(SqlString, oleDbConnection);
            OleDbDataReader oleDbDataReader = null;

            oleDbCommand.Parameters.Add("@EmployeeName", OleDbType.VarChar, 255).Value = userEmployeeName;
            try
            {
                oleDbConnection.Open();
                oleDbDataReader = oleDbCommand.ExecuteReader(CommandBehavior.SingleRow & CommandBehavior.CloseConnection);

                if (oleDbDataReader.HasRows)
                {
                    oleDbDataReader.Read();
                    userRole= oleDbDataReader.GetString(0);
                }
                else
                {
                    userRole = "";
                    return userRole;
                }
            }
            catch (OleDbException e)
            {
                System.Diagnostics.Trace.WriteLine("[Fining User Role] Exception " + e.Message);
                userRole = "";
                return userRole;
            }
            finally
            {
                oleDbConnection.Close();
            }
            return userRole;
        }
0
 

Author Comment

by:neonlights
ID: 20330199
Racterus.... no, I do not want to hack.. loll
Now, I  understand.. I am very sorry - I was confused with "Admin" as a role.. "Admin" is a one of group name..

I will create

MyApplicationX
MyApplicationX_Admins

and use them... thanks again.
0
 

Author Comment

by:neonlights
ID: 20330392
Hi Bob,

Would you please let me know ... how do I call your code.. GetUserRoles..

Thanks
0
 

Author Comment

by:neonlights
ID: 20330410
never mind Bob.. I figured it out.. sorry for that.

Thanks again both.
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