gridview明细表

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
      <Columns>
          <asp:TemplateField HeaderText="费用id" >

              <ItemTemplate>
         <asp:Label ID="lbl01" runat="server"  Text=‘<%#Eval("rentid") %>‘></asp:Label>
                  <asp:GridView ID="GridView2" runat="server" DataSource=‘<%#((System.Data.DataRowView)Container.DataItem).CreateChildView("tableRelation") %>‘ DataMember="rentid">
                  </asp:GridView>
              </ItemTemplate>
          </asp:TemplateField>
      </Columns>
      </asp:GridView>

 string sql = "select rentid from lesseeRent select * from lesseeRentDetails";

            System.Data.DataSet ds = SQLServerHelper.GetDataSet(System.Data.CommandType.Text, sql);
            ds.Tables[0].TableName = "rent";
            ds.Tables[1].TableName = "rentDetails";

            DataColumn parent = ds.Tables["rent"].Columns["rentid"];
            DataColumn child=ds.Tables["rentDetails"].Columns["rentid"];
            DataRelation dtRelation = new DataRelation("tableRelation", parent, child, false);
            ds.Relations.Add( dtRelation);
            GridView1.DataSource = ds;
            GridView1.DataBind();