gridview嵌套gridview

++++++++++.aspx代码++++++++++++++++ OnRowDataBound事件,与1.x中的ItemDataBound有一腿.  <!--第一层GridView开始-->    <asp:GridView ID="GridView1"  OnRowDataBound="GridView1_RowDataBound"  AutoGenerateColumns=false runat="server">      <Columns>       　<asp:TemplateField>       　<ItemTemplate>            <%#Container.DataItem.ToString()%>               <!--第二层GridView开始-->               <asp:GridView ID="GridView2" OnRowDataBound="GridView2_RowDataBound"   AutoGenerateColumns=false runat="server">                          　<Columns>                 　<asp:TemplateField>                 　<ItemTemplate>                       <%#Container.DataItem.ToString()%>                       <!--第三层GridView开始-->                     　<asp:GridView ID="GridView3"  AutoGenerateColumns=false runat=server>                           <Columns>                             <asp:TemplateField>                             <ItemTemplate>                               <%#Container.DataItem.ToString()%>                             </ItemTemplate>                             </asp:TemplateField>                                               </Columns>                        </asp:GridView>                       <!--第三层GridView 结束-->                                          </ItemTemplate>                  </asp:TemplateField>                 </Columns>                </asp:GridView>              <!--第二层GridView结束-->                        </ItemTemplate>          </asp:TemplateField>         </Columns>        </asp:GridView>         <!--第一层GridView结束--> ++++++++++.cs代码++++++++++++++++ RowDataBound与1.x中的ItemDataBound也有一腿! using  System; using  System.Data; using  System.Configuration; using  System.Web; using  System.Web.Security; using  System.Web.UI; using  System.Web.UI.WebControls; using  System.Web.UI.WebControls.WebParts; using  System.Web.UI.HtmlControls; using  System.Collections; public  partial  class  _Default : System.Web.UI.Page {     protected   void  Page_Load( object  sender, EventArgs e)    {         this .GridView1.DataSource  =  Al( " GridView1Item: " );         this .GridView1.DataBind();    }     // DataSource      protected  ArrayList Al( string  GetStr)    {        ArrayList al  =   new  ArrayList();         for ( int  i = 0 ;i < 2 ;i ++ )        {            al.Add(GetStr + i.ToString());        }         return  al;    }     // GridView1_RowDataBound      protected   void  GridView1_RowDataBound( object  sender, GridViewRowEventArgs e)    {         if  (e.Row.RowType  ==  DataControlRowType.DataRow)        {            GridView gv  =  (GridView)e.Row.FindControl( " GridView2 " );            gv.DataSource  =  Al( " GridView2Item: " );            gv.DataBind();                    }    }     // GridView2_RowDataBound      protected   void  GridView2_RowDataBound( object  sender, GridViewRowEventArgs e)    {         if  (e.Row.RowType  ==  DataControlRowType.DataRow)        {            GridView gv  =  (GridView)e.Row.FindControl( " GridView3 " );            gv.DataSource  =  Al( " GridView3Item: " );            gv.DataBind();        }    }}