手动绑定DetailsView编辑时，数据无法更新

我手动绑定DetailsView时，但是运行时，单击编辑按钮，修改表中数据后，数据更新不了，还是原来未修改的原因，不知道什么原因，代码如下，希望大家能指导下
 public partial class CheckResult : System.Web.UI.Page
    {

        SqlConnection sqlcon;

        string strCon = "Data Source=.;Initial Catalog=dkkDB;Integrated Security=True;Uid=sa;Pwd=123456 ";

        private void Bind()
        {
            string ID = Session["name"].ToString();
            string sqlstr = "select * from dkk_companyinfo where orgcode =" + ID;
            sqlcon = new SqlConnection(strCon);
            SqlDataAdapter adp = new SqlDataAdapter(sqlstr, sqlcon);
            DataSet mys = new DataSet();
            sqlcon.Open();
            adp.Fill(mys, "dkk_companyinfo");
            DetailsView1.DataSource = mys;
            DetailsView1.DataKeyNames = new string[] { "orgcode" };
            DetailsView1.DataBind();
            sqlcon.Close();
        }


        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Bind();
            }
        }

        protected void DetailsView_PageIndexChanging(object sender, DetailsViewPageEventArgs e)
        {
            DetailsView1.PageIndex = e.NewPageIndex;
        }

        protected void DetailsView1_Deleting(object sender, DetailsViewDeleteEventArgs e)
        {
            string charAreaCode = this.DetailsView1.DataKey.Value.ToString();
            Bind();
        }

        protected void DetailsView1_ModeChaning(object sender, DetailsViewModeEventArgs e)
        {
            this.DetailsView1.ChangeMode(e.NewMode);
            Bind();
        }

        protected void DetailsView1_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
        {
           string charAreaCode = this.DetailsView1.DataKey.Value.ToString();
         
            dkk_Companyinfo Comp = new dkk_CompanyinfoDAL().Selctbyid(charAreaCode);
            int i;
             = charAreaCode;
            for (i = 0; i < e.NewValues.Count;i++ )
            {
                e.NewValues[i] = Server.HtmlEncode(e.NewValues[i].ToString());
            }
            for (i = 0; i < e.NewValues.Count-1; i++)
            {
                switch (i)
                {
                    case 0: = e.NewValues[i].ToString(); break;
                    case 1: = e.NewValues[i].ToString(); break;
                    case 2: Comp.Txadress = e.NewValues[i].ToString(); break;
                    case 3: Comp.Postcode = e.NewValues[i].ToString(); break;
                    case 4: Comp.Telephone = e.NewValues[i].ToString(); break;
                    case 5: Comp.Faxnumber = e.NewValues[i].ToString(); break;
                    case 6: Comp.Mail = e.NewValues[i].ToString(); break;
                    case 7: Comp.Date = Convert.ToDateTime(e.NewValues[i]); break; ;
                    case 8: Comp.Character = e.NewValues[i].ToString(); break;
                    case 9: Comp.Type = e.NewValues[i].ToString(); break;
                    case 10: Comp.Registercode = e.NewValues[i].ToString(); break;
                    case 11: Comp.Duedate = Convert.ToDateTime(e.NewValues[i]); break;
                    case 12: Comp.Financecode = e.NewValues[i].ToString(); break;
                    case 13: Comp.Division = e.NewValues[i].ToString(); break;
                    case 14: Comp.Classfied = e.NewValues[i].ToString(); break;
                    case 15: Comp.Sqare = float.Parse(e.NewValues[i].ToString()); break;
                    case 16: Comp.Owner = e.NewValues[i].ToString(); break;
                    default: break;
                }
            }
            if(new dkk_CompanyinfoDAL().Update(Comp))
            {
                 ClientScript.RegisterClientScriptBlock(this.GetType(), "", "<script>alert('更新成功')</script>");
           
            }
            new dkk_CompanyinfoDAL().Update(Comp);
            Bind();
        }

        protected void DetailView1_Inserting(object sender, DetailsViewInsertEventArgs e)
        {
            int i;
            for (i = 0; i < e.Values.Count; i++)
            {
                if (e.Values[i] != null)
                {
                    e.Values[i] = Server.HtmlEncode(e.Values[i].ToString());
                }
            }
            Bind();
        }
    }