Atlas实现无刷新三级联动下拉框

今天第一次用Atlas实现了一个无刷新的三级联动下拉框，由于本人的水平还很菜，Atlas也是刚接触，所以代码写得还不是很好，Atlas实现这个确实比较容易，不用写任何的JS代码，微软真的很强，Atlas现在还在研发当中，希望最后推出的时候各项功能都能比较完善。

<%@ Page Language="C#" MasterPageFile="~/site.master" AutoEventWireup="true" CodeFile="Dlist.aspx.cs" Inherits="Dlist" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <atlas:ScriptManager ID="s1" EnablePartialRendering="true" runat="server" />
    <atlas:UpdatePanel ID="up1" runat="server">
        <ContentTemplate>
         <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" DataSourceID="ObjectDataSource_Ddl" DataTextField="province" DataValueField="provinceID">
    </asp:DropDownList><asp:ObjectDataSource ID="ObjectDataSource_Ddl" runat="server"
        InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" SelectMethod="GetProvinceData"
        TypeName="selectProvTableAdapters.provinceTableAdapter">
        <InsertParameters>
            <asp:Parameter Name="id" Type="Int32" />
            <asp:Parameter Name="provinceID" Type="String" />
            <asp:Parameter Name="province" Type="String" />
        </InsertParameters>
    </asp:ObjectDataSource>
    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" DataSourceID="ObjectDataSource_Ddl2"
        DataTextField="city" DataValueField="cityID">
    </asp:DropDownList><asp:ObjectDataSource ID="ObjectDataSource_Ddl2" runat="server"
        InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" SelectMethod="GetCityData"
        TypeName="selectcityTableAdapters.cityTableAdapter">
        <SelectParameters>
            <asp:ControlParameter ControlID="DropDownList1" Name="provinceid" PropertyName="SelectedValue"
                Type="String" />
        </SelectParameters>
        <InsertParameters>
            <asp:Parameter Name="id" Type="Int32" />
            <asp:Parameter Name="cityID" Type="String" />
            <asp:Parameter Name="city" Type="String" />
            <asp:Parameter Name="father" Type="String" />
        </InsertParameters>
    </asp:ObjectDataSource>
    <asp:DropDownList ID="DropDownList3" runat="server" DataSourceID="ObjectDataSource_Ddl3"
        DataTextField="area" DataValueField="areaID">
    </asp:DropDownList><asp:ObjectDataSource ID="ObjectDataSource_Ddl3" runat="server"
        InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" SelectMethod="GetData"
        TypeName="selectareaTableAdapters.areaTableAdapter">
        <SelectParameters>
            <asp:ControlParameter ControlID="DropDownList2" Name="cityid" PropertyName="SelectedValue"
                Type="String" />
        </SelectParameters>
        <InsertParameters>
            <asp:Parameter Name="id" Type="Int32" />
            <asp:Parameter Name="areaID" Type="String" />
            <asp:Parameter Name="area" Type="String" />
            <asp:Parameter Name="father" Type="String" />
        </InsertParameters>
    </asp:ObjectDataSource>
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /><br />
        <asp:Label ID="Label1" runat="server"></asp:Label>   
        
        
        </ContentTemplate>
        <Triggers>
            <atlas:ControlValueTrigger ControlID="DropDownList1" PropertyName="selectedvalue" />
            <atlas:ControlValueTrigger ControlID="DropDownList2" PropertyName="selectedvalue" />
            <atlas:ControlValueTrigger ControlID="DropDownList3" PropertyName="selectedvalue" />
        </Triggers>
    </atlas:UpdatePanel>
   
</asp:Content>

源码：/Files/stony/website1.rar