我想使用一个可以扩展其行的网格视图，里面的行也应该能够扩展。所以基本上我想看到三个层次的信息。我在 Google 上看到了很多工具，但它们不是免费的，或者它们没有降到 3 级。我也不想使用树网格视图对此的任何建议将不胜感激。
提前致谢
这是我到目前为止所拥有的：
<asp:TemplateField>
<ItemStyle CssClass="inv" Width="0" />
<HeaderStyle CssClass="inv" Width="0"></HeaderStyle>
<HeaderTemplate>
</th></tr></HeaderTemplate>
<ItemTemplate>
</td>
<asp:PlaceHolder ID="Project" runat="server" Visible="False">
<tr>
<td colspan="1" style="border: 0px solid #fff; background-color: transparent;">
</td>
<td colspan="9" style="padding: 0px; padding-top: 3px; padding-bottom: 7px; border-right-width: 0px;
border-bottom-width: 0px; background-color: #FFFFFF;">
<asp:UpdatePanel runat="server" ID="ChildControl">
<ContentTemplate>
<asp:LinkButton ID="lbtnAddDeliverable" runat="server" OnClick="lbtnAddDeliverable_Click"
Height="17px">Add Deliverable </asp:LinkButton>
<asp:GridView ID="grid0" runat="server" AllowPaging="True" DataKeyNames="DeliverableID"
AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None"
OnRowDataBound="grid0RowDataBound"
OnRowCommand="grid0_RowCommand" Width="970px" DataSourceID="odsGetDelivbyProjects">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:BoundField DataField="DeliverableID" HeaderText="DeliverableID" SortExpression="DeliverableID" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left"
HeaderStyle-CssClass="invisible" ItemStyle-CssClass="invisible">
<HeaderStyle CssClass="invisible" />
<ItemStyle CssClass="invisible" />
</asp:BoundField>
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" HeaderStyle-CssClass="invisible" ItemStyle-CssClass="invisible" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left"/>
<asp:TemplateField HeaderText="Name" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:LinkButton ID="lbtnEditDeliverable" CommandName="EditDeliverable" runat="server" OnClick="lbtnEditDeliverable_Click"> Edit Deliverable</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Description" HeaderText="Description" SortExpression="Description" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left"/>
<asp:BoundField DataField="StartDate" HeaderText="StartDate" SortExpression="StartDate" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left"/>
<asp:BoundField DataField="EndDate" HeaderText="EndDate" SortExpression="EndDate" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left"/>
<asp:TemplateField HeaderText="" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:LinkButton ID="lbtnAddDelivResource" CommandName="DeliverableResource" runat="server" OnClick="lbtnAddDelivResource_Click"> Add Resources</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Left">
<ItemTemplate>
<asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False" CommandName="Delete"
Text="Delete" OnClientClick="return confirm('Are you certain you want to delete this Delivirable?');">
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<%-- <asp:TemplateField HeaderText="">
<ItemTemplate>
<asp:LinkButton ID="lbtnAddDeliverable" runat="server" OnClick="lbtnAddDeliverable_Click"
Height="17px">Add Deliverable </asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>--%>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
<borderskin bordercolor="Transparent" />
<div class="graph_aux" style="font-size: .7em;">
<span></span>
</div>
<asp:ObjectDataSource ID="odsGetDelivbyProjects" runat="server" SelectMethod="CallDeliverableDetails"
TypeName="Pbel_Resource_Management.Classes.Object_Classes.Projects.ProjectCalls">
<SelectParameters>
<asp:SessionParameter Name="ProjectID" SessionField="DeliverableFromProject" Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
</ContentTemplate>
</asp:UpdatePanel>
</td>
</tr>
</asp:PlaceHolder>
</ItemTemplate>
</asp:TemplateField>