Populating drop down menu's from database dynamically

Hi
I m facing a problem of populating the drop down menu from a MS Access database using JSP. But i m not able to do it. Can you please help me out?
this works perfectly for textarea
<textarea cols="20" rows="20">
<% for(int i =1; i <=rsmd.getColumnCount();++i)
out.println(rsmd.getColumnName(i)); %>
</textarea>
but for drop down box it gives problems
Heres the code!
<select name="aa" ID = "aa">
<option value="<% for(int i =1; i <= rsmd.getColumnCount();++i)
out.println(rsmd.getColumnName(i)); %>" > </option>
</select>
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 61 in the jsp file: /gv/event.jsp
Generated servlet error:
i cannot be resolved
wat can be the alternative? Please hlp
Regards
Sami

Hi i m facing a problem in jsp while filling the dropdown box<select name="combosubject" width="10%" maxlength="20"/>
                              <option ></option>
                              <%
                                            System.out.println("1st time");
                                            rs=stmt.executeQuery("select subject.name from subject order by name");
                                            while(rs.next())
                                              subject = rs.getString(1);
                                         %>
                                         <option ><%=subject%></option>
                                         <%
                         rs.close();
                         stmt.close();
                   %>the problem is that when i execute this code for the first time it works fine and after that it keeps on throwing exception like "No data found", "Column not found"
on <form> action i have recalled this function that is when i click the search button this page is executed again and at this moment i got the exception

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Hello Everyone,
I am user Adobe Designer 7 to create a fillable PDF, and I would like to get the options for a drop down menu from my MS Access database. Basically I would like to populate the drop down menu with the names in the Access database. There i Have a table called PhoneNumbers and it contains the names of all the people I want to appear in the drop down menu that I just created.
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I am trying to dynamically populate a drop down list on a form based on a selection in another drop down list. I have read the help file "To dynamically populate a second field after populating the first" which goes through an example, however I cannot get this example to work for me.
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<?xml version="1.0" encoding="UTF-8"?>
<MyData>
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Hi Paul,
I have another question,
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      <item>4</item>
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      <item>1</item>
   </BG>
   <BK>
      <item>9</item>
   </BK>
</MyData>
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Dynamic Drop-Down Menu Solution

Hi All,
After spending a lot of time trying to find a good solution for a dynamic drop-down menu, I end up writing my own.
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The steps are:
1) JavaBean to return a ResultSet;
2) A custom tag to build a HTML SELECT;
3) A .tld file to declare the custom tag;
4) web.xml where the custom tag mapping resides;
4) A JSP to illustrate how to call the custom tag;
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Cheers
Trajano Roberto
1) Custom tag
package com.amstras.maintenance.customtags;
* Title: erp
* Description:
* Copyright: Copyright (c) 2001
* Company: amstras
* @author Trajano Roberto
* @version 1.0
import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;
import java.sql.*;
import com.amstras.maintenance.javabeans.*;
public class listitemmaster extends TagSupport {
private itemmaster itemmaster = new itemmaster();
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private String parametername = null;
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return EVAL_BODY_INCLUDE;
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try {
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itemmaster.disconnect();
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throw new JspTagException( e.getMessage() );
public void setParametername( String sPARAMETERNAME ) {
parametername = sPARAMETERNAME;
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public ResultSet listitemmaster() throws SQLException, Exception {
if( con != null ) {
try {
String sSQL = null;
sSQL = " SELECT ITEM, ITEMDESCRIPTION FROM ITEMMASTER ORDER BY ITEM ";
ps = con.prepareStatement( sSQL );
rs = ps.executeQuery();
catch( SQLException sqle ) {
error = "SQLException: list item master failed possible record does not exist. ";
error += sqle.toString();
throw new SQLException( error );
catch( Exception e ) {
error = "An exception occured while listing item master record. ";
error += e.toString();
throw new Exception( error );
finally {
return rs;
else {
error = "Exception: Connection to database was lost.";
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3) extract from the .tld file where the custom tag is declared
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN"
"http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd">
<taglib>
<tlib-version>1.0</tlib-version>
<jsp-version>1.2</jsp-version>
<short-name>itemmaster</short-name>
<description>item master</description>
<tag>
<name>viewitemmaster</name>
<tag-class>com.amstras.maintenance.customtags.viewitemmaster</tag-class>
<attribute>
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<required>true</required>
<rtexprvalue>true</rtexprvalue>
<description>item</description>
</attribute>
</tag>
<tag>
<name>listitemmaster</name>
<tag-class>com.amstras.maintenance.customtags.listitemmaster</tag-class>
<attribute>
<name>parametername</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<description>parameter name</description>
</attribute>
</tag>
</taglib>
4) web.xml mapping for the custom tag
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN" "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
<web-app>
<servlet>
<servlet-name>debugjsp</servlet-name>
<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
<init-param>
<param-name>jspCompilerPlugin</param-name>
<param-value>com.borland.jbuilder.webserverglue.tomcat.jsp.JasperSunJavaCompiler</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>debugjsp</servlet-name>
<url-pattern>*.jsp</url-pattern>
</servlet-mapping>
<taglib>
<taglib-uri>erp/maintenance/itemmaster</taglib-uri>
<taglib-location>/WEB-INF/itemmaster.tld</taglib-location>
</taglib>
</web-app>
5) JSP call to the custom tag
<%@ page errorPage="billofmaterialErrorPage.jsp" %>
<%@ taglib prefix = "im" uri = "erp/maintenance/itemmaster" %>
<html>
<head>
<title>CSI - ERP - add bill of material</title>
<link rel = "stylesheet" href = "/erp/erpstyle.css">
</head>
<body>
<h1>Add Bill of Material</h1>
<form action = "billofmaterialcontroller.jsp" method="post">
<table>
<tr>
<td align = "LEFT"><font color = blue>Parent Item:</font></td>
<td><im:listitemmaster parametername = "parameter1" /></td>
</tr>
<tr>
<td align = "LEFT"><font color = blue>Child Item:</font></td>
<td><im:listitemmaster parametername = "parameter2" /></td>
</tr>
<tr>
<td align = "LEFT"><font color = green>Qty Per:</font></td>
<td><input type = "text" name = "parameter3" size = "5" maxlength = "5" /></td>
</tr>
</table>
<p>
<input type="submit" name="submit" value="Add">
<input type="reset" value="Reset">
</p>
<input type = "hidden" name = "Action" value = "Add">
</form>
Click <a href = "billofmaterial.jsp">here</a> to go back.
</body>
</html>

This is a very helpful execellent sample code.
However, If I'm using Model-View-Control approach, then what's the way of applying these codes
to each indivisual file? Say, I have 20 files and only 4 of the 20 need to be treated as they like
to have drop down menu in particular column(s)??? How could the custom tag be applied as the
controller tells the view to present these special treat? or it is not possible (I have to treat each
file, filtered by controller -- one by one as it encounters the special need)?
Thx, Tzae

Populating a Drop down menu JSP form

How to go about populating a drop-down form from Oracle Database using JSP?
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Start the dropdown box with the regular select tags "<select name=this>"
Then open a JSP block and get a resutlset, loop through the resultset and and put the values from the resutlset into the <option> tags for the HTML.
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out.println("<option value=\"" + rs.getString(1) + "\">" + rs.getString(1) + ">");
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I am building an application (i.e. an exe file) from a simple program which use VISA to read and write to a RS-232 com port. When I run it before building the application everything works fine and the VISA resource control, which is a drop down menu, is automatically populated with available com ports. When I run the application on a computer without LabVIEW installed nothing appears in this window. I have made an installer which includes NI LabVIEW Rutime Engine 8.5, NI Measurement & Automation Explorer 4.3 and NI-DAQmx 8.6.1. Is there anything else I need to include? Any specific settings I need to do when I build the exe-file?
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Thank you.
Solved!
Go to Solution.

DAQmx is only for NI DAQ cards so I'm not sure why you installed that. The driver for VISA applications is NI-VISA (surprise!)
Add the NI-VISA run-time to your installer.

Populating drop down menu's from database dynamically

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