binding radio button to database to insert value ASP.NET/C#

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
 
public partial class IntakeQuestionnaire : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            //Declare objects
 
            //Read the connection string from Web.Config
            string connectionString =
                ConfigurationManager.ConnectionStrings[
                "DorknozzleConnectionString"].ConnectionString;
            //Initialize Connection pulling data from data readers etc.
 
        }
    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            //Define Data Objects
            SqlConnection conn;
            SqlCommand comm;
            //Read the connection string from web.config
            string connectionString =
                ConfigurationManager.ConnectionStrings[
                "DorknozzleConnectionString"].ConnectionString;
            //Initialize Connection
            conn = new SqlConnection(connectionString);
            //Create Command
            comm = new SqlCommand(
                "INSERT INTO IntakeQuestionnaire(Name,Address,FaveColor)" +
                "VALUES (@Name,@Address,@FaveColor)", conn);
            //Add command parameters
            comm.Parameters.Add("@Name", System.Data.SqlDbType.NVarChar);
            comm.Parameters["@Name"].Value = txtName.Text;
            comm.Parameters.Add("@Address", System.Data.SqlDbType.NVarChar);
            comm.Parameters["@Address"].Value = txtAddress.Text;
           //** comm.Parameters.Add("@FaveColor", System.Data.SqlDbType.NVarChar);
           //** comm.Parameters["@FaveColor"].Value = rbFaveColor.SelectedValue....not sure how this part should be coded...
            // Enclose database code in Try-Catch-Finally
            try
            {
                // Open the connection
                conn.Open();
                // Execute the command
                comm.ExecuteNonQuery();
                // Reload page if the query executed successfully
                Response.Redirect("SubmissionComplete.aspx");
            }
         
       
            finally
            {
                // Close the connection
                conn.Close();
 
 
 
 
 
 
 
 
            }
        }
    }
}

                                  

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