ajax页面中数据提交事件处理问题?

Question

在页面中做ajax两级联下拉时，页面中同时想通过button事件，对二级下拉中的数据库项进行增加或删除，可是总是提示回调错误，该怎样处理比较好，请指点思路？

Answer 1

那行代码出错
onchage中通过AAJX获取数据ADD option

Answer 2

用js事件，再到js方法里面用ajax调后台代码执行

Answer 3

具体该怎样做呀？我的代码是这样的
一级下拉:<asp:DropDownList ID="DepartmentDrop" runat="server" OnSelectedIndexChanged="DepartmentDrop_SelectedIndexChanged"></asp:DropDownList><cc1:CascadingDropDown ID="department" runat="server" TargetControlID="DepartmentDrop" Category="department" PromptText="Select Item" LoadingText="Loading.." ServicePath="DepartmentService.asmx" ServiceMethod="GetDepartmentContents">
</cc1:CascadingDropDown>         
       二级下拉: <asp:DropDownList ID="personalLeaveEmployeeNameh" runat="server"></asp:DropDownList>
                <cc1:CascadingDropDown ID="employeeByDepartment" runat="server" TargetControlID="personalLeaveEmployeeNameh" 
                 Category="employee" PromptText="Select Item" ParentControlID="DepartmentDrop"
                 LoadingText="Loading.." ServicePath="DepartmentService.asmx" 
                    ServiceMethod="GetEmployeeByDepartmentContents"></cc1:CascadingDropDown> 
            
                <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="&#21024;&#38500;" /></ContentTemplate></asp:UpdatePanel>         
                        <asp:Label  ID="Label2" runat="server" Font-Bold="False" Text=""></asp:Label>
                        <asp:TextBox ID="txtJcdw" runat="server" Width="200px"></asp:TextBox>
<asp:Button ID="tianJia" runat="server" Height="25px" Text="添加二级下拉" Width="41px" OnClick="tjJld_Clk" />

Answer 4

我是用AjaxControlToolkit控件实现级联的

Answer 5

问题是：点button将数据提交至数据库时，发生回调错误.
怎样才能实现ajax级联下拉的页面中，同时实现button的数据提交不发生错误？

Answer 6

怎样用隐藏域保存己选中DropDownList的值，请给个实例吧!?