Populate a combo box using data from a database

Hi Guys, In need of some help, so i have three combo boxes, the first is supplier, the second range and the final model

so what should happen is the user selects the first combo box which will then load the next combo box values,

now i know how to populate the first one, and then how to send the data off to a servlet and preform a search on the database for the values I want, but then how do I pass that back to the client using ajax, and then populate the combo box, I must'nt reload the page!

any help would be greatly appreciated!!!

View Answers

January 24, 2012 at 1:29 PM

1)country.jsp:

<%@page import="java.sql.*"%>
 <html>
      <head>  
      <script language="javascript" type="text/javascript">  
      var xmlHttp  
      var xmlHttp
      function showState(str){
      if (typeof XMLHttpRequest != "undefined"){
      xmlHttp= new XMLHttpRequest();
      }
      else if (window.ActiveXObject){
      xmlHttp= new ActiveXObject("Microsoft.XMLHTTP");
      }
      if (xmlHttp==null){
      alert("Browser does not support XMLHTTP Request")
      return;
      } 
      var url="state.jsp";
      url +="?count=" +str;
      xmlHttp.onreadystatechange = stateChange;
      xmlHttp.open("GET", url, true);
      xmlHttp.send(null);
      }

      function stateChange(){   
      if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){   
      document.getElementById("state").innerHTML=xmlHttp.responseText   
      }   
      }
      </script>  
      </head>  
      <body>  
      <select name='country' onchange="showState(this.value)">  
       <option value="none">Select</option>  
    <%
 Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
 Statement stmt = con.createStatement();  
 ResultSet rs = stmt.executeQuery("Select * from country");
 while(rs.next()){
     %>
      <option value="<%=rs.getString(1)%>"><%=rs.getString(2)%></option>  
      <%
 }
     %>
      </select>  
      <br>  
      <div id='state'>  
      <select name='state' >  
      <option value='-1'></option>  
      </select>  
      </div>  
      </body> 
      </html>

2)state.jsp:

<%@page import="java.sql.*"%>
<%
String country=request.getParameter("count");  
 String buffer="<select name='state' ><option value='-1'>Select</option>";  
 try{
 Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
 Statement stmt = con.createStatement();  
 ResultSet rs = stmt.executeQuery("Select * from state where countryid='"+country+"' ");  
   while(rs.next()){
   buffer=buffer+"<option value='"+rs.getString(1)+"'>"+rs.getString(3)+"</option>";  
   }  
 buffer=buffer+"</select>";  
 response.getWriter().println(buffer); 
 }
 catch(Exception e){
     System.out.println(e);
 }

 %>

For the above code, we have created two database tables:

CREATE TABLE `country` (                                 
           `countryid` bigint(255) NOT NULL auto_increment,       
           `countryname` varchar(255) default NULL,               
           PRIMARY KEY  (`countryid`));





CREATE TABLE `state` (                                   
          `stateid` bigint(255) NOT NULL auto_increment,         
          `countryid` int(255) default NULL,                     
          `state` varchar(255) default NULL,                     
          PRIMARY KEY  (`stateid`));

Advertisements

Retrieving Data from Database to fill Combo Box
Retrieving Data from Database to fill Combo Box Sir, I have a JSP Page with a combo box and a label. I have a database that has two fields id and an image. Now I want to fill the combo box with image and on selecting

populate Combo Box dynamically
populate Combo Box dynamically Hi, How to populate the Combo Box dynamically using Flex with Jsp's

how i conditional access the data from database using combo box. - JSP-Servlet
how i conditional access the data from database using combo box. i have combox box named class when i select its value 11 or 12, another combo box... access the data from database when i select class 11 0r 12. Here is JSP file

Retrieving data from data base using jsp combo box
Retrieving data from data base using jsp combo box Hi guys please... combo box is there and another filed is version of the server(like 1.0,2.0) like... of the server it has to display the process name from database into the process name

retrieve the data to text fields from database on clicking the value of combo box
retrieve the data to text fields from database on clicking the value of combo box retrieve the data to text fields from database on clicking... getting data into textarea from database table by clicking on the button

How to retrieve data from database by using combo box value in jsp? - JSP-Servlet
How to retrieve data from database by using combo box value in jsp? Hello friend i want use only one jsp page.. but u give 2 pages... I want to work in one page... Pl response.. I do not need getParameter... Pl respose me

retrieving from oracle database using jsp combo box
retrieving from oracle database using jsp combo box hi this is my... name of the server has to display in the process name field from the oracle database please help on this i need code using servlets please help me . <

How to retrieve data by using combo box value in jsp? - JSP-Servlet
How to retrieve data by using combo box value in jsp? For example, In Employee.jsp form, When i click employee id value in combo box...... i already stored combo box values from database. pl

Populate dropdown menu from database using jsp and servlet
Populate dropdown menu from database using jsp and servlet please i need code to populate dropdown menu from mysql database using jsp and servlet. thanks

How to retrieve data by using combo box value in jsp? - JSP-Servlet
How to retrieve data by using combo box value in jsp? I am using a single jsp form.. i did not get from another form.. i do not use 2 jsp form.. all... stored Combobox values from

How to retreive data by using combo box value - JSP-Servlet
How to retreive data by using combo box value I am using a single... there... /// Here stored Combobox values from database. Note: I am using only this jsp form.. i do not use to get values from

How to retreive data by using combo box value - JSP-Servlet
How to retreive data by using combo box value Hello friend... the values from html. So u r using if(request.getParameter("cid")!=null... I can print combo box values

How to retrieve data using combo box value in jsp? - JSP-Servlet
How to retrieve data using combo box value in jsp? Hi freind, I already post this question. I need urgent help from u. pl response me.... All actions in the same page....... Hi Friend, Please visit

How to retrieve data by using combo box value in jsp? - JSP-Servlet
in combo box from database.. by using select*from studentinformation; But when i...How to retrieve data by using combo box value in jsp? Hi Friends... related value.... I am using only this page.. not get value from another page

Loading combo box from oracle
Loading combo box from oracle how can i load values into a combobox from oracle database when a value is selected in another combo box

How to show autocomplete textbox values on combo box option selection using database?
How to show autocomplete textbox values on combo box option selection using database? When I select option(i.e First Year) then it will show list of student names in auto-complete text box

retrive the data from access database to drop down list box in jsp
retrive the data from access database to drop down list box in jsp hai, im new to jsp now im using the jsp along with access database.in table i load all the data's i need to retrive the data from database to dropdown list box

how to retrieve data into combo from database in java applet?
how to retrieve data into combo from database in java applet? hi,. i have written applet codes for linking two frames and database connectivity but the problem is, the database is not retrieving data into the combo..please

How to get data from DB in to Text box by using Jsp & Ajax
How to get data from DB in to Text box by using Jsp & Ajax I want to get the data from database in to text box in a jsp page by using Ajax. If I... with a and from that i need to select the required value and i should store

retrieve data from database using jsf
retrieve data from database using jsf Hello I want an example of source code to retrieve data from database i have a database (oracle) name as db1 it's contain table 'author' composed of three columns idauthor(primary key

Use of Select Box to show the data from database
Use of Select Box to show the data from database �... page to show the data fetched from the database. We are using Servlet to get data from the database using MySQL and we are forwarding this servlet data

retrieving data in to the dropdown box from postgresql database in core java
retrieving data in to the dropdown box from postgresql database in core...=st.executeQuery("SELECT role_name from role WHERE dept_id=1234"); if(rs... database: import java.sql.*; import java.awt.*; import javax.swing.*; import

retrive data from database using jsp in struts?
retrive data from database using jsp in struts? *search.jsp* <%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <... searchProduct(SearchDTO sdto) { String query="select * from product

how to get selected name from combo box
how to get selected name from combo box i have fetched all records of worker i.e worker name. on a test.jsp and dispayed it into combo box ...my... of worker name within d combo box and display that id into a text box. plz

populate dropdown box
populate dropdown box hi, Is there any ways in which i can populate my dropdown menu with values from 1 to n (n = the value stored in database)using java script or jsp, either is fine? Ex: If value corresponding to selected

Data needs to be gathered in XML file from the database (MySql) using JSP
Data needs to be gathered in XML file from the database (MySql) using JSP�... data regarding particular id from the database table. Data needs to be gathered in XML file from the database (MySql) using appropriate JSP/Java Bean functions

I want to Populate ComBobox value from database that combox is Itemrenderer of DataGrid.
I want to Populate ComBobox value from database that combox is Itemrenderer of DataGrid. I want to Populate ComBobox value from database that combox is Itemrenderer of DataGrid

insert data using drop down box in java into database postgresql
insert data using drop down box in java into database postgresql can... data into database using an drop down box .....as i m using eclipse as jdbc and postgresql as data base syntax which i m using is like:- java class

sending data to google chart api from mysql database using java
sending data to google chart api from mysql database using java how to send data from mysql database to google chart api using java

how to display data from mysql table in text box using jsp??
how to display data from mysql table in text box using jsp?? <p>hi, i have a written a code to display data from a mysql table into txtboxes... QueryString = "SELECT * FROM code<em>ot WHERE code</em>codeot=12

Read data from excel file and update database using jsp
Read data from excel file and update database using jsp read data from excel file and update database using jsp Hi, I am using a MySQL database... upload excel file and update database using JSP ? Thanks in Advance

view data from database using drop down list
view data from database using drop down list hi i want to view the data from database by selecting a value in a drop down list. for an example drop down list have picture element.when click it select pictures from the database

combo box - JSP-Servlet
combo box I am using a JSP form in which a combobox is given and I want to populate data in it from database and on the basis of yhe selected item I want to display related data in a textbox Hi Friend, Create

place data in text fields from database using jdbc
place data in text fields from database using jdbc i want get the data from database and place the records in the respective textfields using jdbc and swing like eno,ename,loc from emp table

How to Retrieve Data from the database and write into excel file using Java
How to Retrieve Data from the database and write into excel file using Java Hi, I am trying to develop an small application where i trying to retrieve Data from the database and store the details in excel file. Please can

loading value into combo box by selecting value from other combo box - JSP-Servlet
loading value into combo box by selecting value from other combo box �... is that as i select state from state_combo_box,then the next combo box is dynamically... box with constituency corresponding to district..... all three combo box

retrieve related data from database using jsp and mysql
retrieve related data from database using jsp and mysql Hi sir, please give some example of jsp code for retrieving mysql database values in multiple dropdown list. if we change a value in a dropdown its related value must

How to get the data from the database using Servlet or JSP program
How to get the data from the database using Servlet or JSP program �... the problem Get data from database using servlet Retrieve data from database using JSP Get data from database using JSP

How to insert data from textfields into database using hibernate?
How to insert data from textfields into database using hibernate? try{ Session session = HibernateUtil.getSessionFactory().openSession...); System.out.println("Successfully data insert in database"); tx.commit

combo box
combo box Hi, [_|] dropdown box... a screen like this using jsp-servlet(or DAO,DTO),in that drop down box i should get usernames from the database & upon selection of particular user i should get

How retreive data from database without using post method in jsp - JSP-Servlet
How retreive data from database without using post method in jsp Tell me how? Hi Friend, If you don't want to use post method then use... the selected value from the combo box and get textbox value from another page

Ads