List Controls from Different Collections

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 LIstBoundingFromDatabase : System.Web.UI.Page
{
    SqlConnection connection;
    SqlCommand cmd;

    protected void Page_Load(object sender, EventArgs e)
    {

            if (!Page.IsPostBack)
        {
            Connect();
        }
    }
    public void Connect()
    {
        connection = new SqlConnection(" server=192.168.1.2;database=ProjectManagementSystem;user ID=sa; password=sa");
        connection.Open();
        cmd = new SqlCommand("dbo.select_StudentDemo", connection);
        cmd.CommandType = CommandType.StoredProcedure;
        DataSet ds = new DataSet();
        SqlDataAdapter sda = new SqlDataAdapter(cmd);

        sda.Fill(ds);

        // Binding Values To DropDownList
       //*******************************

        ddl_StudentName.DataSource = ds;
        ddl_StudentName.DataTextField = "studentname";
        ddl_StudentName.DataValueField = "studentid";
        ddl_StudentName.DataBind();

        // Binding Values To DropDownList
       //*******************************

        lb_Name.DataSource = ds;
        lb_Name.DataTextField = "studentname";
        lb_Name.DataValueField = "studentid";
        lb_Name.DataBind();

        // Binding Values To Radio Button List
       //************************************
        rbtnlist_Name.DataSource = ds;
        rbtnlist_Name.DataTextField = "studentname";
        rbtnlist_Name.DataValueField = "studentid";
        rbtnlist_Name.DataBind();

        // Binding Values To Radio Button List
       //************************************
        btlist_Name.DataSource = ds;
        btlist_Name.DataTextField = "studentname";
        btlist_Name.DataValueField = "studentid";
        btlist_Name.DataBind();


        cbl_Name.DataSource = ds;
        cbl_Name.DataTextField = "studentname";
        cbl_Name.DataValueField = "studentid";
        cbl_Name.DataBind();

       
    }
}