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Dynamic Dropdown

Member
  
Join Date: Aug 2008
Posts: 40
#1: Aug 26 '08
Using javascript i have created dynamic fields in a form with an "add" button.If i press "add" button the fields get repeated.

Now my problem is that,after entering the values in the form,the values in the dropdown box field gets refreshed if i press the "add" button.

my requirement is that the "add" button should be pressed each time after entering the data before repeating the form.

After entering all the required values for the required number of times the "Submit" button should be pressed which takes all the values to the database at once.

The number of times the "add" button should be pressed will vary time to time.

RamananKalirajan's Avatar
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Join Date: Mar 2008
Location: Chennai - India
Posts: 350
#2: Aug 26 '08

re: Dynamic Dropdown

Hi Divya, I was not able to follow ur requirement. can you please post ur code what u have tried so far. I cant clearly catch ur requirement. In a form you are dynamically populating some text field. when u fill up the text field ur drop down gets changed. i cant get this point clearly.

Regards
Ramanan Kalirajan
Member
  
Join Date: Aug 2008
Posts: 40
#3: Aug 26 '08

re: Dynamic Dropdown

[HTML]<html>
<head>
<script language="javascript">
function createTable(id,ctr)
{
var tbody = document.getElementById(id).getElementsByTagName(" TBODY")[0];
var i;
for(i=1;i<=ctr;i++)
{

var row1td1=document.createElement('TD');
var row1td1sel=document.createElement('select' );
row1td1sel.setAttribute('id','PA'+i,'NAME','prefer ence_access');
row1td1.appendChild(row1td1sel);

var subrow1_y=document.createElement('option');
subrow1_y.innerHTML='Y';
subrow1_y.value=1;

var subrow1_n=document.createElement('option');
subrow1_n.innerHTML='N';
subrow1_n.value=2;

row1td1sel.appendChild(subrow1_y);
row1td1sel.appendChild(subrow1_n);




var row1td2=document.createElement('TD');
var row1td2sel=document.createElement('select' );
row1td2sel.setAttribute('id','RA'+i,'NAME','reques t_access');
row1td2.appendChild(row1td2sel);

var subrow2_y=document.createElement('option');
subrow2_y.innerHTML='Y';
subrow2_y.value=1;

var subrow2_n=document.createElement('option');
subrow2_n.innerHTML='N';
subrow2_n.value=2;
row1td2sel.appendChild(subrow2_y);
row1td2sel.appendChild(subrow2_n);




var row1=document.createElement('TR');

var row1td3=document.createElement('TD');
var row1td3_n=document.createElement('INPUT');
row1td3.appendChild(row1td3_n);
row1td3_n.setAttribute('TYPE','text');
row1td3_n.setAttribute('NAME','UID'+i);
row1td3_n.setAttribute('ID','UID'+i);



var row1td4=document.createElement('TD');
var row1td4_n=document.createElement('INPUT');
row1td4.appendChild(row1td4_n);
row1td4_n.setAttribute('TYPE','text');
row1td4_n.setAttribute('NAME','CID'+i);
row1td4_n.setAttribute('ID','CID'+i);

row1.appendChild(row1td1);
row1.appendChild(row1td2);
row1.appendChild(row1td3);
row1.appendChild(row1td4);


tbody.appendChild(row1);
}
}

function addRowToTable()
{
var tbl = document.getElementById('t1head');
var lastRow = tbl.rows.length;
// if there's no header row in the table, then iteration = lastRow + 1
var iteration = lastRow;
var row = tbl.insertRow(lastRow);

// select cell
var cell1 = row.insertCell(0);
var sel1 = document.createElement('select');
sel1.name = 'Categories';
sel1.id='RA'+iteration;
sel1.options[0] = new Option('Y', '0');
sel1.options[1] = new Option('N', '1');
cell1.appendChild(sel1);

// select cell
var cell2 = row.insertCell(1);
var sel2 = document.createElement('select');
sel2.name = 'preferences_access';
sel2.id='PA'+iteration;
sel2.options[0] = new Option('Y', '0');
sel2.options[1] = new Option('N', '1');
cell2.appendChild(sel2);

// left cell
var cell3 = row.insertCell(2);
var textNode = document.createElement('input');
textNode.setAttribute('type','text','name','text'+ iteration,'id','txt'+iteration);
cell3.appendChild(textNode);

// right cell
var cell4 = row.insertCell(3);
var el = document.createElement('input');
el.type = 'text';
el.name = 'text' + (iteration+1);
el.id = 'txt' + (iteration+1);
cell4.appendChild(el);
}
</script>
<body bgcolor="#fffcd0" onLoad=createTable('t1head',0)>
<form >
<table class="layout" border="4" align="center" width="100%" id=t1head>
<tr>
<td align="left"><b> Categories </b></td>
<td align="left"><b> Items </b></td>
<td align="left"><b> Quantity </b></td>
<td align="left"><b> Price </b></td>
</tr>
</table>
<table>
<tr><td></td></tr><tr><td></td></tr>
<tr><td></td></tr></tr><tr><td></td></tr>
</tr><tr><td></td></tr><tr><td></td></tr>
<tr><td></td></tr></tr><tr><td></td></tr>
</table>
<table class="layout" border="0" align="center" id=tabBtn>
<tr>
<td align="center" colspan="2">
<input type="button" value="ADD" name="add" onClick="addRowToTable()">
</td>

<td align="center" colspan="2">
<input type="submit" value="SAVE" name="save">
</td>


<td align="center" colspan="2">
<input type="button" value="CANCEL" name="cancel" onClick="history.go(0)">
</td>
</tr>
</table>
</form>
</body>
</html>
[/HTML]
The above code is taken from the same forum posted by u which is the required one for me..Now my problem is the two dropdown boxes in which i have used ajax..i cant incorporate it in ur above code...the code which i tried was:


Expand|Select|Wrap|Line Numbers
  1.     function generateRow() {
  2.     var d=document.getElementById("div");
  3.     d.innerHTML+="Category : ";
  4.  
  5.     d.innerHTML+="<select name='Categories' id='Categories" + numLinesAdded + "' onChange='itemCollect(this.value," + numLinesAdded + ")'><option value=''>------Select Category------</option><?php while($resultset=mysql_fetch_array($category)){?><option value='<?=$resultset['category_id'];?>'><?=$resultset['Categories']; ?></option><?php }?></select>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
  6.  
  7.     d.innerHTML+="Items : ";
  8.  
  9.     d.innerHTML+="<select id='itemList" + numLinesAdded + "'><option value=''>------Select an Item------</option></select>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
  10.  
  11.     d.innerHTML+="Quantity : ";
  12.  
  13.     d.innerHTML+="<input type='text' maxlength='5' name='Quantity" + numLinesAdded + "' onkeypress='focusNext(this)'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";
  14.  
  15.     d.innerHTML+="Price : ";
  16.  
  17.     d.innerHTML+="<input type='text' name='Price" + numLinesAdded + "'><br><br>" ;
  18.     numLinesAdded++; 
  19.     } 
  20.  
The values for the dropdown are taken directly from the database through ajax...Is it possible to fulfill my requirement????pls help me...



The problem with my code is that whenever i click "submit",the values in the dropdown gets refreshed and not saved which is rectified in ur code..
RamananKalirajan's Avatar
Needs Regular Fix
  
Join Date: Mar 2008
Location: Chennai - India
Posts: 350
#4: Aug 26 '08

re: Dynamic Dropdown

Why can't you go for DOM rather using innerHTML. This seems to be some what new for me. I will try to help you out. In your code

[HTML]d.innerHTML+="<select name='Categories' id='Categories" + numLinesAdded + "' onChange='itemCollect(this.value," + numLinesAdded + ")'><option value=''>------Select Category------</option><?php while($resultset=mysql_fetch_array($category)){?>< option value='<?=$resultset['category_id'];?>'><?=$resultset['Categories']; ?></option><?php }?></select>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";[/HTML]

instead of using this just give some static data in d.innerHTML. Like this

[HTML]d.innerHTML+= <select name="Categories" id="Categories" onChange="itemCollect(this)"><option value="1">Y</option> <option value="0">N</option></select>[/HTML]

and try running your code. Instead of retrieving the values from the DB just hard code it and test it out. if it works, you have to use DOM rather using innerHTML. just try it and post back the result i will try to help u out

Regards
Ramanan Kalirajan
Member
  
Join Date: Aug 2008
Posts: 40
#5: Aug 26 '08

re: Dynamic Dropdown

Quote:

Originally Posted by RamananKalirajan

Why can't you go for DOM rather using innerHTML. This seems to be some what new for me. I will try to help you out. In your code

[HTML]d.innerHTML+="<select name='Categories' id='Categories" + numLinesAdded + "' onChange='itemCollect(this.value," + numLinesAdded + ")'><option value=''>------Select Category------</option><?php while($resultset=mysql_fetch_array($category)){?>< option value='<?=$resultset['category_id'];?>'><?=$resultset['Categories']; ?></option><?php }?></select>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;";[/HTML]

instead of using this just give some static data in d.innerHTML. Like this

[HTML]d.innerHTML+= <select name="Categories" id="Categories" onChange="itemCollect(this)"><option value="1">Y</option> <option value="0">N</option></select>[/HTML]

and try running your code. Instead of retrieving the values from the DB just hard code it and test it out. if it works, you have to use DOM rather using innerHTML. just try it and post back the result i will try to help u out

Regards
Ramanan Kalirajan



No Ramanan,
Each and every change in the project deals with the database.The contents in the dropdown are not static.It will increase or decrease day by day...so the values have to be retrieved from the database...i have to replace that "Y" and "N" with my data from the database...so i have used that technique..No other go....Thanks for your help.dont put much effort...i ll try it out myself.......
RamananKalirajan's Avatar
Needs Regular Fix
  
Join Date: Mar 2008
Location: Chennai - India
Posts: 350
#6: Aug 26 '08

re: Dynamic Dropdown

Wether you are getting the DB values getting loaded in the Select. Your problem is when you submit the data you are not getting the selected value. Instead the select gets refreshed itself. You want the Selected value also to be saved/submitted when the form is submitted

Regards
Ramanan Kalirajan
Member
  
Join Date: Aug 2008
Posts: 40
#7: Aug 26 '08

re: Dynamic Dropdown

Yes exactly but now i ve come out with a new one..I am getting what i am expecting but i could not submit the values into the database...the javasript function is:


Expand|Select|Wrap|Line Numbers
  1.   <script>
  2.   var numLinesAdded = 0;
  3.   var i=0;
  4.  
  5.  
  6.     function generateRow() {
  7.  
  8.     var placeHolder=document.getElementById('appendElem');
  9.     var placeHolderDiv=document.createElement('div');
  10.     var Category=document.createElement('select');
  11.     var Item=document.createElement('select');
  12.     var itemQuantity=document.createElement('input');
  13.     var itemPrice=document.createElement('input');
  14.     var itemControl='itemList' + i;
  15.  
  16.             Category.setAttribute('id','catList','NAME','catList[]');
  17.                 Category.onchange=function(){itemCollect(this.value, itemControl);}
  18.  
  19.             Item.setAttribute('id',itemControl,'NAME','itemList[]');
  20.                 Item.innerHTML="<option value=''>------Select an Item------</option>";
  21.  
  22.             itemQuantity.setAttribute('id','itemQty','NAME','itemQty[]');
  23.  
  24.             itemPrice.setAttribute('id','itemPrice','NAME','itemPrice[]');
  25.  
  26.                     placeHolderDiv.appendChild(Category);
  27.                     placeHolderDiv.appendChild(Item);
  28.                     placeHolderDiv.appendChild(itemQuantity);
  29.                     placeHolderDiv.appendChild(itemPrice);
  30.  
  31.                 placeHolder.appendChild(placeHolderDiv);
  32.  
  33.         i++;
  34.     } 
  35. </script>  
  36.  


and the ajax function is:



Expand|Select|Wrap|Line Numbers
  1. var xmlHTTP
  2. var itemXMLHTTP
  3. var categoryXMLHTTP
  4. var refId
  5. //function to select Items
  6. function itemCollect(str,ref)
  7. //function itemCollect(str)
  8. {
  9.     refId=ref
  10.     itemXMLHTTP = GetXmlHttpObject()
  11.     if(itemXMLHTTP == null)
  12.     {
  13.         alert("XML-HTTP object was not Created")
  14.         return;
  15.     }
  16.         var URL="items.php?c=" + str +"&randID=" + Math.random()
  17.         itemXMLHTTP.onreadystatechange = categoryChanged
  18.         itemXMLHTTP.open("GET",URL,"true")
  19.         itemXMLHTTP.send(null)
  20.  
  21. }
  22. //category list
  23. function categoryCollect()
  24. {
  25.  
  26.     categoryXMLHTTP = GetXmlHttpObject()
  27.     if(categoryXMLHTTP == null)
  28.     {
  29.         alert("XML-HTTP object was not Created")
  30.         return;
  31.     }
  32.         var URL="categoryListCollection.php?randID=" + Math.random()
  33.         categoryXMLHTTP.onreadystatechange = listCategory
  34.         categoryXMLHTTP.open("GET",URL,"true")
  35.         categoryXMLHTTP.send(null)
  36.  
  37. }
  38.  
  39. //lists the category
  40. function listCategory(){
  41.  
  42.     if(categoryXMLHTTP.readyState == 4){
  43.         var categoryListing    = document.getElementById('catList')
  44.         categoryListing.innerHTML=categoryXMLHTTP.responseText
  45.     }
  46.  
  47. }
  48.  
  49.  
  50. //calls this function on selectCategory onreadystatechange
  51. function categoryChanged()
  52. {
  53.  
  54.     if(itemXMLHTTP.readyState == 4)
  55.     {
  56.  
  57.         document.getElementById(refId).innerHTML = itemXMLHTTP.responseText
  58.     }
  59.  
  60. }
  61.  
  62.  
  63.  
  64. //function to create XMLHTTP object
  65. function GetXmlHttpObject()
  66. {
  67.     var xmlHttp = null
  68.   try
  69.     {
  70.     // Firefox, Opera 8.0+, Safari
  71.     xmlHttp = new XMLHttpRequest()
  72.     }
  73.   catch (e)
  74.     {
  75.     // Internet Explorer
  76.     try
  77.       {
  78.       xmlHttp = new ActiveXObject("Msxml2.XMLHTTP")
  79.       }
  80.     catch (e)
  81.       {
  82.       try
  83.         {
  84.         xmlHttp = new ActiveXObject("Microsoft.XMLHTTP")
  85.         }
  86.       catch (e)
  87.         {
  88.         alert("Your browser does not support AJAX!")
  89.         }
  90.       }
  91.     }
  92.    return xmlHttp
  93. }
Here,items.php and categoryListCollection.php are the files from where the values are taken from the database for the dropdown boxes...
can u get me....can u understand what i am expecting...
RamananKalirajan's Avatar
Needs Regular Fix
  
Join Date: Mar 2008
Location: Chennai - India
Posts: 350
#8: Aug 26 '08

re: Dynamic Dropdown

Hi, I am really happy that you over come ur previous problem. Now you are not able to save/submit the values in the DB. If yes means, can u post me the code how u are doing it


Regards
Ramanan Kalirajan
Member
  
Join Date: Aug 2008
Posts: 40
#9: Aug 29 '08

re: Dynamic Dropdown

Quote:

Originally Posted by RamananKalirajan

Hi, I am really happy that you over come ur previous problem. Now you are not able to save/submit the values in the DB. If yes means, can u post me the code how u are doing it


Regards
Ramanan Kalirajan

sorry for the delay in reply ramanan.i was on leave for the past 2 days....i ll send u my total code...today i am getting problem with foreach statement...and the appended values are not getting submitted...pls help me...

[HTML]<?php
include "connection.php";
session_start();
$select= mysql_query("select * from master_items");
$category = mysql_query("select * from master_category");
$supplier=mysql_query("select * from master_suppliers");

if(isset($_GET['submit']))
{
$result=mysql_query("select * from master_expenses where Item_id='$_GET[Items]'");
$resultset=mysql_fetch_array($result);
$item =mysql_query("select * from master_items where Item_id='$_GET[Items]'");
$items=mysql_fetch_array($item);

$current_Stock=$items['stock'];
$avgPrice=$items['avgPrice'];

$catList = $_GET['Categories'];
$itemControl= $_GET['itemList'];
$itemQty = $_GET['Quantity'];
$itemPrice = $_GET['Price'];

foreach($catList as $newQty)
{
$closing_Stock= $current_Stock + $itemQty;
$averagePrice= (float) ((($avgPrice*$current_Stock) + ($itemQty * $itemPrice)) / $closing_Stock );
$quantity=$itemQty;
$amount=$quantity*$itemPrice;

$insert=mysql_query("INSERT INTO master_expenses(Date,
category_id,
Item_id,
transaction,
Quantity,
Price,
Total,
supplier_Name,
invoice_Number,
closing_Stock,
Average,
preStock)
VALUES(curdate(),
'$_GET[Categories]',
'$_GET[Items]',
'$_GET[transaction]',
'$quantity',
'$itemPrice',
'$amount',
'$_GET[supplier_Name]',
'$_GET[invoice_Number]',
'$closing_Stock',
'$averagePrice',
'$current_Stock')") or die(mysql_error());

$update=mysql_query("update master_items set stock='$closing_Stock', avgPrice= $averagePrice where Item_id='$_GET[Items]'");
header('location:inward.php');
}
}
?>

<html>
<head>
<script language="javascript" src="deajax.js"></script>

<script>
var numLinesAdded = 0;
var i=0;

function generateRow() {

var placeHolder=document.getElementById('appendElem');
var placeHolderDiv=document.createElement('div');
var Categories=document.createElement('select');
var itemList=document.createElement('select');
var Quantity=document.createElement('input');
var Price=document.createElement('input');
var itemControl='itemList' + i;

Categories.setAttribute('id','catList','NAME','Cat egories[]');

Categories.onchange=function(){itemCollect(this.va lue, itemControl);}

itemList.setAttribute('id',itemControl,'NAME','ite mList[]');
itemList.innerHTML="<option value=''>------Select an Item------</option>";

Quantity.setAttribute('id','itemQty','NAME','Quant ity[]');

Price.setAttribute('id','itemPrice','NAME','Price[]');

placeHolderDiv.appendChild(Categories);
placeHolderDiv.appendChild(itemList);
placeHolderDiv.appendChild(Quantity);
placeHolderDiv.appendChild(Price);

placeHolder.appendChild(placeHolderDiv);

i++;
}
</script>
</head>

<body >

<form method="get">
<h3>Inward Transactions</h3>
<div><b>Select a supplier:</b></div>
<div>
<select name="supplier_Name" id="supplier_Name">
<option value="">------Select a Supplier------</option>
<?php while($resultset=mysql_fetch_array($supplier)){?>
<option value="<? echo $resultset['supplier_id']; ?>"><? echo $resultset['supplier_Name']; ?>
</option>
<?php }?>
</select>
</div>
<br>
<div><b>Invoice Number:</b></div>
<div><input type="text" size="30" name="invoice_Number" id="invoice_Number"/></div>
<br>
<div id="div"></div>
<br>
<div id='appendElem'></div>
<input type="button" value="Add Product(s)" onClick="generateRow(), categoryCollect()"/>
<input type="submit" name="submit" id="submit">
</form>
</body>
</html>[/HTML]
RamananKalirajan's Avatar
Needs Regular Fix
  
Join Date: Mar 2008
Location: Chennai - India
Posts: 350
#10: Aug 29 '08

re: Dynamic Dropdown

After this line,
[HTML] placeHolder.appendChild(placeHolderDiv);[/HTML]
pls insert a line
[HTML]placeHolder.innerHTML=placeHolder.innerHTML;[/HTML]

This is a silly code but it refreshes ur container. Just try it out and post it back in the forum.

[Note: I am not very good at PHP. May be Acoder can help u out]

Regards
Ramanan Kalirajan.
acoder's Avatar
Site Moderator
  
Join Date: Nov 2006
Location: UK
Posts: 14,581
#11: Aug 30 '08

re: Dynamic Dropdown

Firstly, test that your PHP code works as expected. If you have problems with your PHP code, ask in the PHP forum.
Reply

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