Asp chart Refresh method

Question

I have a ASP:Chart control .I want to set it as a dynamic chart.Actually in my Code i refresh the Whole chart for every time .I want to refresh the series alone .Suggest me some Ideas.

private void  chartload()
       {
        DataTable myTable = new DataTable();
        DataView dv = new DataView(myTable);
         dv.RowFilter = (("Name='A'"));
             Chart1.Series[0].LegendText = ddllicense.SelectedItem.Text;
                 Chart1.Series[0].BorderWidth = 2;
                 Chart1.Legends["Legend1"].Position.Auto = true;
                    Chart1.DataSource = dv;
                           Chart1.DataBind();

                       }



protected void Timer1_Tick(object sender, EventArgs e)
       {
           chartload();
       }