dynamic select box
hello friends i created a form and details of city & locations have to be come from database. if city hyderabad chosen then locations of hyderabad only appear in location selectbox.plz send code it is more helpful tome.
View Answers
April 19, 2012 at 1:33 PM
1)city.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="location.jsp";
url +="?city=" +str;
xmlHttp.onreadystatechange = stateChange;
xmlHttp.open("GET", url, true);
xmlHttp.send(null);
}
function stateChange(){
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete"){
document.getElementById("location").innerHTML=xmlHttp.responseText
}
}
</script>
</head>
<body>
<select name='city' 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 city");
while(rs.next()){
%>
<option value="<%=rs.getString(1)%>"><%=rs.getString(2)%></option>
<%
}
%>
</select>
<br>
<div id='location'>
<select name='location' >
<option value='-1'></option>
</select>
</div>
</body>
</html>
2)location.jsp:
<%@page import="java.sql.*"%>
<%
String city=request.getParameter("city");
String buffer="<select name='location' ><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 location where cityid='"+city+"' ");
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 `city` (
`cityid` bigint(255) NOT NULL auto_increment,
`cityname` varchar(255) default NULL,
PRIMARY KEY (`cityid`));
CREATE TABLE `location` (
`locationid` bigint(255) NOT NULL auto_increment,
`cityid` int(255) default NULL,
`location` varchar(255) default NULL,
PRIMARY KEY (`locationid`));
April 20, 2012 at 6:50 AM
thank u my dear friend.but i have a code like this will u plz edit and send to me in correct manner. i am waiting for it .if u send as much as possible it will helpful to me my dear friend thanks forever.
<html>
<head>
<title>demo</title>
<body>
<form method="POST" action="http://localhost/vtigercrm/modules/Webforms/
post.php">
<input type="hidden" value="Leads" name="moduleName" />
<table>
<tbody>
<tr>
<td><label>Last Name</label></td>
<td><input type="text" name="lastname" value="" /></td>
</tr>
<tr>
<td><label>First Name</label></td>
<td><input type="text" name="firstname" value="" /></td>
</tr>
<tr>
<td><label>Company</label></td>
<td><input type="text" name="company" value="" /></td>
</tr>
<tr>
<td><label>email</label></td>
<td><input type="text" name="email" value="" /></td>
</tr>
<tr><td><label>city</label></td><td colspan=1>
<select name="city">
<option>city</option>
<?php
$connect=mysql_connect("localhost","root","venkataz");
if(!$connect) die("access failed");
$select=mysql_select_db("vtigercrm530");
if(!$select) die("select failed");
echo "selected vtigercrm530";
$query="SELECT DISTINCT address_city FROM vtiger_users";
$result=mysql_query($query);
if(!$result) die("database access failed:" . mysql_error());
while($row = mysql_fetch_array($result))
{
echo "<option value>".$row['address_city']."</option>";
}
?>
</select>
</tr>
<tr><td><label>lane</label></td><td colspan=1>
<select id="lane" onselect="show();">
<option>location</option>
<script type="text/javascript">
function show()
{
var lane=document.getElementById["lane"].selectedIndex;
alert(lane);
}
</script>
<?php
$connect1=mysql_connect("localhost","root","venkataz");
if(!$connect1) die("access failed");
$select1=mysql_select_db("vtigercrm530");
if(!$select1) die("select failed");
echo "";
echo "<br/>";
$query1="SELECT address_city FROM vtiger_users";
$result1=mysql_query($query1);
if(!$result1) die("database access failed:" . mysql_error());
$lcity=$_REQUEST["city"];
$rows=mysql_num_rows($result1);
for($j=0;$j<$rows;$j++)
if(mysql_result($result1,$j,"address_city")==$lcity)
{
$query2="SELECT address_street FROM vtiger_users WHERE address_city='".mysql_result($result1,$j,'address_city')."'";
$result2=mysql_query($query2);
while($row= mysql_fetch_array($result2))
{
echo "<option value>".$row['address_street']."</option>";
}
}
?>
</select>
</td></tr>
</tbody>
<table>
<input type="submit" value="Submit" />
</form>
</body>
</head>
</html>
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