Populate A Second DropDownList Based On A Selected Value From Other DropDownList

Jun 23, 2010

I'm trying to link two dropdownlist depending on the value you select from the first dropdownlist. What I want to do is select a value from the first dropdownlist and depending on its value show some options in the second dropdownlist. I try doing this:

1-when the OnChange event of the first dropdownlist occurs, I call a javascript that redirects to a method in a controller (for example: index/mainController/firstMethod/selectedValue).

2-the method in the controller using the url helper extracts the “selectedValue” to do a database search of the value of the second dropdownlist.

3-the same method loads the view (the one that have the ddl)

Doing this I lose the selected value of the first ddl. I think this is not the right way to do it.

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So how to change state input type (TEXTBOX OR DROPDOWNLIST) based on USA (country).That is If USA -DROPDOWNLIST Else Other Countries -TEXTBOX

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it really does work. the next thing i would like to do is to insert into the database everything that were chosen that were moved to List2[] using queries with PHP and Mysql..

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(Main FORM)
<form name="NewBar" method="post" onsubmit="return validateFormOnSubmit(this)" action="AssignContactDetailToBar_f.php">
<td width="150"><b>Bar:</b></td>
<select name = "bar" onChange="getContact('AssignContactDetailToBar_f_getContacts.php?bar='+this.value)" size = 1 style = "width:190px">

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List A: Car Manufactures (honda, nissan, etc)
List B: Models (accord, civic, etc)

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Just like the title says i'm having difficulties in achieving it. Here's my dropdownlist:

$query = "SELECT data, rel_id FROM $tbl_rel_balansas INNER JOIN $tbl_balansas ON $tbl_rel_balansas.rel_id = $tbl_balansas.id WHERE $tbl_rel_balansas.member_id = '$_SESSION[id]' group by data";
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Here's the buttonclick:


After I press it, it retrieves the data I want from the date I've chosen from the drop down list and also reset whole drop down list showing the first value of the dates from sql database, not the one I selected. If anyone knows how to keep the selected value in the list

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<select onchange='document.location.href=this.options[this.selectedIndex].value;'>
<option value="?lang=eng">US English</option>
<option value="?lang=esp">Español</option>
<option value="?lang=fra">Français</option>

How can I include the language files based on what the user selects, I just don't know what to put as the condition in the if statement.

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excname = dfgdg
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dummy code
if today
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In my dropdownlist I have two different values for each option. How can I retrieve both? Let me illustrate what I mean.

<select name="my_ddl">
<option value="<?php $value_Id ?>"><?php $value_text ?></option>
<option value="<?php $value_Id ?>"><?php $value_text ?></option>

When the form is posted, I want to be able to get both the $value_id and $value_text of the selected option. How can I do this?

$_POST['my_ddl'] only gets one value not both.

In asp.net I could do this simply by referring to my_ddl.Value and my_ddl.Text.

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<select id="animal" name="animal">
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I have a dropdown like this. What I want, I want to get selected value and text in button submit using PHP.I mean if it's selected 1st one. I want to get both 1 and Ca

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function getReportSingleMonth($month, $year, $id_user=NULL) {
$month = $db->real_escape_string($month);

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here is the code:

<form name="psform" action="pistonsingle.php" method="post">
$display = displaymaincat(1);
echo $result['maincategory'];


its working. it displays the data but the problem is when the user click the submit button even he/she select a certain manufacturer or model, what my code do is just display all the aircrafts and not a certain aircraft that belong to a certain manufacturer and model.

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the subname
the price
the stock in one shop
the stock of the other shop
the group name
the brandname

What i have now is that it shows 12 products on 1 page, with a next and previous link on top of the page. The pages are made with the group name, every group has it's own page, so you have a drums page, guitar page, speaker page. That all works great. What i programmed in there is a dropdownlist, it drops down a list of brandnames, which should narrow the search for a person who is looking at the products. Problem is right now, that the dropdown menu works, i see the brands, but they are NONE clickable, only the brands that are currently on the page are shown, so NOT all the brands from that group are shown, only the 12 that are currently showing, when you press next, it shows 12 more brands, but i want them to be shown right on the start.

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echo "<select name="$strNameField" size="1" multiple="multiple">";

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require "session_logincheck.php";
function selectProductAndPopulate()


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* Método encargado de consultar las ciudades
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