ASP.NET：多级下拉菜单的级连显示问题_.net资料_编程技术-你的首页-uuhomepage.com
多级下拉菜单的级连显示问题。
在这里，我为了实现公司－部门级连显示问题，我编写了leader_add_competence_dialogquery.jsp ，web.xml，SelectCropDepartServlet.java 类。
其中注意的是leader_add_competence_dialogquery中的.jspChange_Select() javascript函数中的/selectCropDepart是在web.xml中定义的servlet类。我们在实现应用当中需要修改的用红字标出。
其中leader_add_competence_dialogquery.jsp代码如下：
<%@ page contentType="text/html; charset=gbk" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="pub.*" %>
http://www.w3.org/TR/html4/loose.dtd">
添加领导权限
<%
String strUserID=request.getParameter("Key");
session.setAttribute("EmployUserID",strUserID);
%>
<%
Conn conn=new Conn();
String m1Script="";
//String m2Script="";
m1Script=PubClass.BindAllCorpList("document.all.Corp");
//m2Script=PubClass.BindAllDepartList("document.all.Depart",""+session.getAttribute("cropid"));
//sPositionList=conn.bindDropListSel("document.all.PositionName","select * from sys08_Position","PositionName","PositionID");
%>
<%= m1Script%>
Web.xml代码如下：
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
selectCropDepart
pub.SelectCropDepartServlet
selectCropDepart
/selectCropDepart
SelectCropDepartServlet.java Servlet类代码如下
/**
* 从sys04_Machine表中取数据进行二级下拉菜单(公司,部门)及关联的servlet类
* @author 邓浩
*/
public class SelectCropDepartServlet extends HttpServlet {
public SelectCropDepartServlet() {
super();
}
public void destroy() {
super.destroy(); }
/**
* The doGet method of the servlet.
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/xml");
response.setCharacterEncoding("UTF-8");
response.setHeader("Cache-Control", "no-cache");
String targetId = request.getParameter("id").toString();
String xml_start ="";
String xml_end = "";
String xml = "";
try{
Conn conn=new Conn();
DataTable dt=new DataTable();
String Sql="select * from sys04_Machine where cropid="+targetId;
////System.out.println("Sql:"+Sql);
xml+= "" ;
int i=0;
if (conn.querySql(Sql,dt)){
while (i
xml+= "";
i=i+1;
}
}
String last_xml = xml_start + xml + xml_end;
//System.out.println("last_xml:"+last_xml);
// last_xml = new String(last_xml.getBytes("UTF-8"), "GB2312");
response.getWriter().write(last_xml);
}// try
catch (Exception e){
System.out.print(e.getMessage());
}
}
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
doGet(request,response);
}
public void init() throws ServletException {
}
}
