Automatically link two or more listBoxes on a Windows Form - C# 2005

Hello Experts,

I am currently populating three Lisboxes from database fields like this:

               //*********GETTING DATA FROM DB and FILLING LISTBOXES
(Connection string code not shown)                
dataAdapter = new SqlDataAdapter();
                dataSet = new DataSet();
                dataAdapter.SelectCommand = cmd;
               
                dataAdapter.Fill(dataSet, "dbFields");
                dataTable = dataSet.Tables[0];
                       
                SqlDataReader reader = cmd.ExecuteReader();

                   //fill first listbox
                    lbOne.Items.Clear();
                    foreach ( DataRow dataRowOne in dataTable.Rows)
                    {
                       
                        lbOne.Items.Add(dataRow["fldOne"]);
                       
                    }

                   //fill second listbox
                    lbTwo.Items.Clear();
                    foreach (DataRow dataRowTwo in dataTable.Rows)
                    {


                        lbTwo.Items.Add(dataRowTwo["fldTwo"]);
                    }

                   //fill third listbox
                   lbThree.Items.Clear();
                    foreach (DataRow dataRowThree in dataTable.Rows)
                    {


                        lbThree.Items.Add(dataRowSpecialArea["fldThree"]);
                    }
                   reader.Close();
                   /*********END GETTING DATA FROM DB and FILLING LISTBOXES

I then have this code to select each possible combination of fields represented in the three listboxes based on database records:
//Code is called when user clicks on an item in lbOne
DataRow selectedRow = dataTable.Rows[lbTwo.SelectedIndex];
            lbOne.Text = selectedRow["fieldOne"].ToString();
            lbThree.Text = selectedRow["fieldThree"].ToString();

For Example: If there is even one record in the database that looks like this:
  rec    fieldOne   fieldTwo   fieldThree
     1           A                 C               V
     2           A                 C               B
     3           A                 D               B

The values of all three listboxes selected when the user clicks on the first item (A of Rec1) in lbOne would be:
lbOne = A
lbTwo = C
lbThree = V

When the second itemin lbOne is selected (A of Rec 2) in lbOne :
lbOne = A
lbTwo = C
lbThree = B

And So on...

Now I have the following code to select each item in lbOne automatically and populate a variable based on each value in lbOne  like this:
double x = 0;
            foreach (object obj in lbOne.Items)
             {
                x = Convert.ToDouble(obj);
             }
This works fine to extract ech item in lbOne but...

Problem: Does anyone know how to select the other listBox values in the for loop to get each possible combination from the database without the user having to click on each item in lbOne (like I have shown above)  to select the items in lbTwo and lbThree???