Adding row in itemtemplate for grid view

[noora]

Hi
i was facing problem in my nested gridviews, and thank god i solved it, but with minor issues in the look and feel of the grid view
this is an aspx code

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="True" ShowFooter="true" DataKeyNames="userid" OnRowDataBound="GridView1_RowDataBound" OnPageIndexChanging="gridView_PageIndexChanging">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <tr>
                            <td colspan="100%">
                                <div id="div<%# Eval("userid") %>" style="display: none; position: relative; left: 15px;
                                    overflow: auto; width: 97%">
                                    <asp:GridView ID="GridView2" AllowSorting="true" AutoGenerateColumns="false" runat="server" DataKeyNames="CurrentActorUID"
                                        OnPageIndexChanging="GridView2_PageIndexChanging">
                                         <Columns>
                                            <asp:BoundField DataField="ReferenceNo" HeaderText="ReferenceNo" ReadOnly="True" />
                                            <asp:BoundField DataField="Initiator" HeaderText="Requester" ReadOnly="True" ControlStyle-Width="50px" />
                                            <asp:BoundField DataField="Status" HeaderText="Status" ReadOnly="True" />
                                            <asp:BoundField DataField="RequestedDate" HeaderText="RequestedDate" ReadOnly="True" />
                                            <asp:BoundField DataField="ServiceNo" HeaderText="ServiceNo" ReadOnly="True" />
                                            <asp:BoundField DataField="Details" HeaderText="Details" ReadOnly="True" />
                                        </Columns>
                                    </asp:GridView>
                                </div>
                            </td>
                        </tr>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>

and the code behind

using (SqlDataAdapter mySqlAdapter1 = new SqlDataAdapter(command))
            {              
                DataSet myDataSet = new DataSet();
                mySqlAdapter1.Fill(myDataSet);
                DataTable dt = new DataTable();
                mySqlAdapter1.Fill(dt);
                if (dt != null)
                {
                    if (dt.Rows.Count > 0)
                    { TemplateField templateField = new TemplateField();
                            TemplateField uid = new TemplateField();
                            uid.HeaderText = "userid";
                            uid.ItemTemplate = new AddItemTemplate(ListItemType.Item, "userid");
                            GridView1.Columns.Add(uid);
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            BoundField boundField = new BoundField();
                                if (dt.Columns[i].ColumnName.ToString() != "userid")
                                {
                                    boundField.DataField = dt.Columns[i].ColumnName.ToString();
                                    boundField.HeaderText = dt.Columns[i].ColumnName.ToString();
                                }
                                GridView1.Columns.Add(boundField);
                        }
                    }
                }
                GridView1.DataSource = dt;
               GridView1.DataBind();
            }

notice there are <tr><td colspan="100%"> under the itemTemplate for the child gridview
when i run the report, the itemtemplate column was created for the userid but the column header is shifted to the right that affect the look of the table. also when i click on userid the <div> tag should be visible below and in the example above i am getting the <div> above the clicked userid and this is wrong that's mean the the <tr> is create above.

so how can i solve this problem? any suggestions
i thought of using repeater, and adding this repeater dynamically but i don't know how