嵌套的gridview2

我没分了，所以分不多。请指点。CS0103: 当前上下文中不存在名称“GridView2”我的嵌套。前台代码：
<asp:GridView ID="TrainPerson_gv" runat="server" AutoGenerateColumns="False" Width="672px">
            <Columns>
             <asp:TemplateField>
             <ItemTemplate>
  <table width="100%" border="0" cellspacing="1" cellpadding="0">
    <tr>
      <td height="27" colspan="3" align="left" bgcolor="#cad0d7"><span class="Style_13px_ffffff_B">&nbsp; </span><span class="Style_12px_333333_B">部门：<%#DataBinder.Eval(Container.DataItem,"INFO_NAME") %></span>    <asp:Label ID="INFO_ID" runat="server" Visible="false"></asp:Label>
          <asp:CheckBox ID="CheckBox1" runat="server" />
          <span class="LastMap">本部门全选</span></td>
    </tr>
    <tr>
      <td height="30" colspan="3" align="left"><table height="29" border="0" cellpadding="0" cellspacing="0">
            <tr>
            <td width="33" height="22" align="right"> 
            <asp:GridView ID="GridView2" runat="server" Width="100%" AutoGenerateColumns="False" ShowHeader="False" BorderStyle="Solid" BorderColor="#C0C0FF" BorderWidth="1px" OnRowCreated="GridView2_RowCreated">
                                                         <Columns>
                                                             <asp:TemplateField>
                                                                 <ItemTemplate>
                                                                     
                                                                    
                                                                    
                                                                    <table width="100%" border="0">
  <tr>
    <td>&nbsp;</td>
  </tr>
</table>
                                                                    
                                                                    
                                                                    
                                                                 </ItemTemplate>
                                                             </asp:TemplateField>
                                                         </Columns>
                                                         <RowStyle BorderColor="#C0C0FF" BorderStyle="Solid" />
                                                     </asp:GridView>
              
</td>
              <td width="60">&nbsp;</td>            </tr>
          </table>      </td>
    </tr>
  </table>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>后台:
 string TrainPerson = "select distinct a.P_DEPARTMENT,b.INFO_ID,b.INFO_NAME,b.INFO_LEADER from RS_Person a,RS_D_INFOMATION b where a.P_DEPARTMENT = b.INFO_ID ";//联合查询，表内数据
  if (!IsPostBack)
        {
            Tongyong.SetLinkMaps(RightMaps1, "人事管理", "../RsManage/Right_Content.aspx", "_self", "培训管理", "", "", "培训管理", "LastMap");
            //TrainPerson = TrainPerson + "";
            Bind();
        }    }         protected void Bind()
    {
        
        //部门的绑定循环
        DataSet ds = DbClass.getDateSet(TrainPerson);        
        int i = ds.Tables[0].Rows.Count;
        _TrainPerson.RecordCount = i.ToString();
        DbClass.BindGridView(TrainPerson, TrainPerson_gv);
        //部门绑定结束
        //根据类编号获得旗下版块
        for (int g = 0; g < ds.Tables[0].Rows.Count; i++)
        {            string TrainMan = "select P_ID,P_NAME from RS_Person where P_DEPARTMENT =" + ds.Tables[0].Rows[g]["INFO_ID"].ToString();
            DataSet ds1 = DbClass.getDateSet(TrainMan);
            int k = ds1.Tables[0].Rows.Count;
            _TrainPerson.RecordCount = k.ToString();
            DbClass.BindGridView1(TrainMan, GridView2);         }    }
当前上下文中不存在名称“GridView2”