DevExpress.XtraTreeList 小结

搞了半天才绑定好，没有弄清楚父子之间的关系

        <dx:ASPxTreeList ID="ASPxTreeList1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" KeyFieldName="child_id" ParentFieldName="parent_id">
            <Columns>
                <dx:TreeListTextColumn FieldName="Product_name" VisibleIndex="0">
                </dx:TreeListTextColumn>
                <dx:TreeListTextColumn FieldName="Product_sum" VisibleIndex="1">
                </dx:TreeListTextColumn>
                <dx:TreeListTextColumn FieldName="support_id" VisibleIndex="2">
                </dx:TreeListTextColumn>
                <dx:TreeListTextColumn FieldName="child_id" VisibleIndex="3">
                </dx:TreeListTextColumn>
                <dx:TreeListTextColumn FieldName="parent_id" VisibleIndex="4">
                </dx:TreeListTextColumn>
            </Columns>
            <SettingsSelection AllowSelectAll="True" Enabled="True" Recursive="True" />
        </dx:ASPxTreeList>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Test_CumtomConnectionString %>"SelectCommand="SELECT * FROM [db_product_information]"
       

额，我怕忘了，就先传点，主要是关系要对好

这边

KeyFieldName="child_id"        
ParentFieldName="parent_id"