GridView动态添加templatefield，如何对其进行编辑，更新等等

 public class GridViewTemplate : ITemplate    {
        private DataControlRowType templateType;
        private string columnName;
        public GridViewTemplate(DataControlRowType type, string colname)
        {
            templateType = type;
            columnName = colname;
        }
        public void InstantiateIn(System.Web.UI.Control container)
        {
            switch (templateType)
            {
                case DataControlRowType.Header:
                    Literal lc = new Literal();
                    lc.Text = columnName ;
                    container.Controls.Add(lc);
                    break;
                case DataControlRowType.DataRow:
                    TextBox data = new TextBox();
                    data.DataBinding += new EventHandler(data_DataBinding);
                    container.Controls.Add(data);
                    break;
                default:
                    break;
            }
        }        private void data_DataBinding(object sender, EventArgs e)
        {
            TextBox l = (TextBox)sender;
            GridViewRow row = (GridViewRow)l.NamingContainer;
            l.Width = 60;
            l.Text = DataBinder.Eval(row.DataItem, columnName).ToString();
        }    }
//以上动态添加templatefield的方法。private void setFields()
{       
  
          string e = DropDownList1.SelectedValue;
          string f = DropDownList2.SelectedValue;
          kc = Request.QueryString["kc"];
          string col5 = kc + e + f;
        TemplateField customField=new TemplateField();
        customField.HeaderTemplate = new GridViewTemplate(DataControlRowType.Header, kcname.HeaderText);
        customField.ItemTemplate = new GridViewTemplate(DataControlRowType.DataRow, col5);
     GridView1.Columns.Add(customField);
}
//将动态生成的TemplateField添加到GridView1中，
问题是如果我想对添加后的TemplateField进行编辑、更新等如何操作？谢谢!各位人心人士的“帮助”！