updatepanel 里datagridview自带的刷新不起作用
贴上代码：
aspx：部分
<asp:UpdatePanel ID="uid" runat="server" UpdateMode="Conditional" >  
  <ContentTemplate>  
  <div >  
  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
  Width="228px" AllowPaging="true" PageSize="2"
  onrowcancelingedit="GridView1_RowCancelingEdit" 
  onrowdatabound="GridView1_RowDataBound" onrowdeleting="GridView1_RowDeleting" 
  onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating" 
  onrowcommand="GridView1_RowCommand" 
  onpageindexchanging="GridView1_PageIndexChanging">
  <Columns>
  <asp:BoundField DataField="au_id" HeaderText="au_id" ReadOnly="True" />  
  <asp:BoundField DataField="au_lname" FooterText="aaaa" HeaderText="au_lname" />
  <asp:BoundField DataField="au_lname" HeaderText="au_lname" />
  <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
  <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
  </Columns>
  </asp:GridView>
  <br />
  </div>
  </ContentTemplate>  
  </asp:UpdatePanel>

.cs部分
protected void Page_Load(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  this.Calendar1.Style["position"] = "absolute";
  this.TextBox1.DataBind();
  GridViewBind();  
  }
   
  }
  private void GridViewBind()
  {
   
  string connStr =ConfigurationManager.AppSettings["DSN"];
  SqlConnection conn = new SqlConnection(connStr);
  string sql1 = "select top 1 au_id,au_lname,au_fname from authors ";
  SqlDataAdapter myAdapter = new SqlDataAdapter(sql1, conn);
  DataSet ds = new DataSet();
  myAdapter.Fill(ds, "authors");
  foreach (DataRow iVer in ds.Tables[0].Rows)
  { string a = iVer[1].ToString();
  string b = iVer[2].ToString();
  }这里读出来的结果是对的 但是显示的不对
  this.GridView1.DataSource = ds.Tables[0].DefaultView;
  this.GridView1.DataBind(); //数据绑定
  }
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
  GridView1.EditIndex = e.NewEditIndex;
  GridViewBind();
}
protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
  //string id = GridView1.DataKeys[e.RowIndex].Values[1].ToString();
  string id = GridView1.Rows[e.RowIndex].Cells[0].ToString();
  //string connStr = ConfigurationManager.ConnectionStrings["