How do I post selected (grouped) radio button to database?

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C#

MS-Access

I'm working on a survey, with radio buttons. I have gotten to the point where I can insert a value (RB5=5) into the database, but it is not the selected one on the form.

From the form I would like to select the radio button and have that number (value) post in my access database; Table-Columns: (Question1(Q1), Question2(Q2) ...).


Thank you for your help

What I have tried:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;

namespace ms_access_databasefile
{
    public partial class Survey : System.Web.UI.Page
    {
        string Q1 = "";
        OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\SHS\Downloadhold\AcDb2.mdb");
        OleDbCommand cmd = new OleDbCommand();
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            con.Open();
            OleDbCommand cmd = new OleDbCommand("insert into Table2 (Q1) Values('"+RB5.Text+"')", con);
            int r = cmd.ExecuteNonQuery();
            con.Close();

            if (RB1.Checked == true)
            { Q1 = "1"; }
            if (RB2.Checked == true)
            { Q1 = "2"; }
            if (RB3.Checked == true)
            { Q1 = "3"; }
            if (RB4.Checked == true)
            { Q1 = "4"; }
            if (RB5.Checked == true)
            { Q1 = "5"; }
        }


    }

}