How to add a Dataset in to a Data Cache?

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Data;

public partial class DataCaching : System.Web.UI.Page

{

    SqlConnection objCon = new SqlConnection();

    SqlCommand objCmd = new SqlCommand();

    SqlDataAdapter objAda = new SqlDataAdapter();

    DataSet objDs = new DataSet();

    DataView objview;





    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            objview = (DataView)Cache["testCache"];

            if (objview == null)

            {

                objCon.ConnectionString = "Data Source=.;Initial Catalog=Company;Integrated Security=True;";

                objCmd.Connection = objCon;

                objCmd.CommandText = "select * from emp";

                objAda.SelectCommand = objCmd;

                objAda.Fill(objDs, "emp");

                objview = new DataView(objDs.Tables["emp"]);

                Cache["testCache"] = objview;

                lblData.Text = "Dataset from Table:";



            }

            else

            {

                lblData.Text = "Dataset from Cache:";



            }

            GridView1.DataSource = objview;

            GridView1.DataBind();

        }

    }

}