VS 2010 (VB) การเรียกใช้เบส โดยเก็บคำสั่งไว้ฟอร์มเดียว

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;

namespace TEST.Class
{
    public class DBConnection
    {
        public static string strConnString = "Data Source=.\\SQLEXPRESS;User ID=sa;Password=sa;Initial Catalog=MYBASE;Integrated Security=True";
      
    }
}

using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.ComponentModel;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using TEST.Class;
namespace TEST
{
    public partial class _Default : System.Web.UI.Page
    {

        SqlConnection objConn;
        SqlCommand objCmd;       
        StringBuilder sb;
protected void Page_Load(object sender, EventArgs e)
        {
            
  ShowGridview();
                   }
private void ShowGridview()
        {
            DataSet ds = new DataSet();
            sb = new StringBuilder();

            sb.Append("SELECT * FROM tblregis");

            objConn = new SqlConnection(DBConnection.strConnString);
            if (objConn.State == ConnectionState.Closed)
            {
                objConn.Open();
            }
            objCmd = new SqlCommand();
            objCmd.CommandText = sb.ToString();
            objCmd.CommandType = CommandType.Text;
            objCmd.Connection = objConn;

            SqlDataAdapter da = new SqlDataAdapter(objCmd);
            da.Fill(ds);
            grvdata.DataSource = ds;
            grvdata.DataBind();
        }
}