二级菜单无刷新联动（XMLPOST + Jscript 方式）
二级菜单无刷新联动（XMLPOST + Jscript 方式）
根据Menu Type 的选择来，来获取Menu的数据
Menu_Type 存有两个选择 主菜单 和 子菜单
主菜单不存有菜单项，用来在在其下面挂菜单的，也就是说主菜单都存有子项菜单
Menu选择子菜单，Menu列出所有的菜单内容
程序是放在ascx 中做的，下面我们来看代码部分
1. 前台代码（全部代码,其实我们主要看jscript 部分XmlPost(obj) 和背景色high light 部分）
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="UC_Menu_Level_Init.ascx.cs" Inherits="Live.Admin.UserControls.UC_Menu_Level_Init" %>
<table border="1" bordercolor="lightblue" bordercolordark="#ffffff" cellpadding="0"
cellspacing="0" width="100%">
<tr>
<td style="width: 100%; height: 13px" valign="top">
<table border="0" bordercolor="#888888" bordercolordark="#ffffff" cellpadding="0"
cellspacing="0" width="100%">
<tr>
<td style="width: 100%; height: 19px" valign="top">
Menu Level Edit</td>
</tr>
</table>
<table border="0" bordercolor="#888888" bordercolordark="#ffffff" cellpadding="0"
cellspacing="0" width="100%">
<tr>
<td align="left" style="width: 160px; height: 24px" valign="top">
Menu Type</td>
<td align="left" style="width: 679px; height: 24px" valign="top">
<asp:DropDownList ID="DropDownList_MenuType" runat="server" Width="154px">
</asp:DropDownList></td>
</tr>
<tr>
<td align="left" style="width: 160px; height: 24px" valign="top">
Menu Level Code</td>
<td align="left" style="width: 679px; height: 24px" valign="top">
<asp:TextBox ID="TextBox_Level_Code" runat="server" Width="263px"></asp:TextBox></td>
</tr>
<tr>
<td align="left" style="width: 160px; height: 24px" valign="top">
Menu Parent Level Code</td>
<td align="left" style="width: 679px; height: 24px" valign="top">
<asp:TextBox ID="TextBox_Level_Parent_Code" runat="server" Width="263px"></asp:TextBox></td>
</tr>
<tr>
<td align="left" style="width: 160px; height: 24px" valign="top">
Menu Level Name(En)</td>
<td align="left" style="width: 679px; height: 24px" valign="top">
<asp:TextBox ID="TextBox_Level_Name_En" runat="server" Width="263px"></asp:TextBox></td>
</tr>
<tr style="color: #000000">
<td align="left" style="width: 160px; height: 24px" valign="top">
Menu Level Name(Cn)</td>
<td align="left" style="width: 679px; height: 24px" valign="top">
<asp:TextBox ID="TextBox_Level_Name_Cn" runat="server" Width="263px"></asp:TextBox></td>
</tr>
<tr style="color: #000000">
<td align="left" style="width: 160px; height: 22px">
Menu</td>
<td align="left" style="width: 679px; height: 22px"><asp:DropDownList ID="DropDownList_Menu" runat="server" Width="154px">
</asp:DropDownList></td>
</tr>
<tr>
<td align="left" style="width: 160px; height: 24px">
Sort Number</td>
<td align="left" style="width: 679px; height: 24px">
<asp:TextBox ID="TextBox_SortNumber" runat="server" Width="41px"></asp:TextBox></td>
</tr>
<tr>
<td align="left" style="width: 160px; height: 24px">
Status</td>
<td align="left" style="width: 679px; height: 24px">
<asp:DropDownList ID="DropDownList_Status" runat="server" Width="154px">
</asp:DropDownList></td>
</tr>
</table>
<table border="0" bordercolor="#888888" bordercolordark="#ffffff" cellpadding="0"
cellspacing="0" width="100%">
<tr>
<td style="width: 100%; height: 21px" valign="top">
<asp:Button ID="Button_Menu_Add" runat="server" Text="Add"
Width="58px" /></td>
</tr>
</table>
<asp:DataGrid ID="DataGrid_MenuList" runat="server" AutoGenerateColumns="False" BackColor="#F7F7F7"
BorderColor="#F7F7F7" BorderStyle="Solid" BorderWidth="1px" CssClass="table"
DataKeyField="Menu_ID" Font-Bold="False" Font-Italic="False" Font-Overline="False"
Font-Size="10pt" Font-Strikeout="False" Font-Underline="False" Width="100%">
<FooterStyle CssClass="headcenter" />
<EditItemStyle BackColor="LightGray" ForeColor="Black" Width="100%" />
<SelectedItemStyle BackColor="Transparent" />
<AlternatingItemStyle BackColor="White" BorderColor="White" />
<ItemStyle BackColor="AliceBlue" CssClass="textcenter" Font-Bold="False" Font-Italic="False"
Font-Overline="False" Font-Strikeout="False" Font-Underline="False" />
<HeaderStyle BackColor="LightSteelBlue" CssClass="headcenter" Font-Bold="True" Font-Italic="False"
Font-Overline="False" Font-Strikeout="False" Font-Underline="False" />
<Columns>
<asp:BoundColumn DataField="Menu_ID" HeaderText="Menu ID"></asp:BoundColumn>
<asp:BoundColumn DataField="Menu_Name_En" HeaderText="Menu Name(En)"></asp:BoundColumn>
<asp:BoundColumn DataField="Menu_Name_Cn" HeaderText="Menu Name(Cn)"></asp:BoundColumn>
<asp:BoundColumn DataField="Url" HeaderText="Url"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="Status">
<ItemTemplate>
<asp:Label ID="Level_Status_L1" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Status.Status_Desc_Cn") %>'
Visible="true"></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DropDownList_Status_D" runat="server" Width="112px">
</asp:DropDownList>
<asp:Label ID="Level_Status_L2" runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Status.Status_Code") %>'
Visible="False"></asp:Label>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Update Menu">
<ItemStyle Width="15%" />
<ItemTemplate>
<asp:LinkButton ID="Linkbutton_Edit" runat="server" CausesValidation="false" CommandName="Edit"
NAME="Linkbutton1" Text="<img border=0 src=Images/Files/Edit.gif alt=Edit this item>"></asp:LinkButton>
</ItemTemplate>
<EditItemTemplate>
<asp:LinkButton ID="Linkbutton2" runat="server" CausesValidation="false" CommandName="Update"
NAME="Linkbutton2" Text="<img border=0 src=Images/Files/Save.gif alt=Save...>"></asp:LinkButton>
<asp:LinkButton ID="Linkbutton3" runat="server" CausesValidation="false" CommandName="Cancel"
NAME="Linkbutton3" Text="<img border=0 src=Images/Files/Undo.gif alt=Cancel...>"></asp:LinkButton>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:ButtonColumn CommandName="Delete" HeaderText="Delete Menu" Text="<img border=0 src=Images/Files/Delete.gif alt=Delete this item>">
</asp:ButtonColumn>
</Columns>
</asp:DataGrid></td>
</tr>
</table>
<script type="text/javascript" defer=true>
//以XML求取数据
function XmlPost(obj)
{
var svalue = obj.value;
//alert(svalue);
if(svalue=="请选择")
{
document.getElementById('<%=DropDownList_Menu.ClientID %>').length=0;
}
else if(svalue==1) //Top 主菜单
{
document.getElementById('<%=DropDownList_Menu.ClientID %>').length=0;//清空原来存在的
document.getElementById('<%=DropDownList_Menu.ClientID %>').options.add(new Option("--不设菜单--",0)); //不设菜单，Menu_ID 都设为
}
else
{
var webFileUrl = "?TypeID=" + svalue;
var result = "";
var xmlHttp = new ActiveXObject("MSXML2.XMLHTTP");
xmlHttp.open("POST", webFileUrl, false);//使用XMLPOST方式
xmlHttp.send("");//发送
result = xmlHttp.responseText;//得到返回的结果
if(result != "")
{
document.getElementById('<%=DropDownList_Menu.ClientID %>').length=0;//清空原来存在的
var LArray = result.split(",");
for(var i=0;i<LArray.length;i++)
{
var ary1 = LArray[i].toString().split("|");
//alert(ary1[0].toString());
//alert(ary1[1].toString());
document.getElementById('<%=DropDownList_Menu.ClientID %>').options.add(new Option(ary1[0].toString(),ary1[1].toString()));
}
}
<