我们如何制作相关的组合框 [英] how we can make related combo box
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问题描述
DEAR SIR I AM USING FOLLOWING CODE
DATABASE /////////////////// company//////
Database: `Work`
Table structure for table `category`
CREATE TABLE `category` (
`id` bigint(11) NOT NULL auto_increment,
`category_name` varchar(255) NOT NULL,<big></big>
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=20 ;
Dumping data for table "category":
INSERT INTO `category` (`id`, `category_name`) VALUES
(9, 'Electronics'),
(2, 'Mobiles'),
(3, 'Camera'),
(10, 'Home & Kitchen'),
(11, 'Apparel'),
(12, 'Gifts'),
(13, 'Appliances'),
(19, 'Medicine');
Table structure for table "company":
CREATE TABLE `company`
(
`id` bigint(11) NOT NULL auto_increment,
`cat_id` int(11) NOT NULL,
`company_name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=34 ;
Dumping data for table "company":
INSERT INTO `company` (`id`, `cat_id`, `company_name`) VALUES
(1, 2, 'Samsung'),
(2, 2, 'Nokia'),
(3, 2, 'LG'),
(6, 11, 'Rebook'),
(7, 11, 'Denim'),
(8, 11, 'Nike'),
(9, 13, 'Philips'),
(10, 13, 'Prestige'),
(11, 3, 'Nikon'),
(12, 3, 'Cannon'),
(13, 3, 'Sony'),
(14, 9, 'Tohsiba'),
(15, 9, 'Panasonic'),
(16, 12, 'Dinner Set'),
(31, 19, 'Generic'),
(18, 10, 'Samsung'),
(19, 10, 'LG'),
(30, 19, 'Branded'),
(32, 19, 'Ayurvedic '),
(29, 19, 'OTC'),
(33, 19, 'homeopethic');
Code Part
config.php
<?php
$host="localhost";
$username="root";
$password="root";
$dbname="company";
$con=mysql_connect("$host","$username","$password");
mysql_select_db("$dbname",$con);
?>
<?php
include('config.php');
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<script language="javascript" type="text/javascript">
function showCompany(catid) {
document.frm.submit();
}
</script>
</head>
<body>
<form action="" method="post" name="frm" id="frm">
<table width="500" border="0">
<tr>
<td width="119">Category</td>
<td width="371">
<select name="cat_id" id="cat_id" value="cat_id" onChange="showCompany(this.value);">
<option value="">--Select--</option>
<?php
$sql1="select * from category";
$sql_row1=mysql_query($sql1);
while($sql_res1=mysql_fetch_assoc($sql_row1))
{
?>
<option value="<?php echo $sql_res1["id"]; ?>" <?php if($sql_res1["id"]==$_REQUEST["cat_id"]) { echo "Selected";}?>>
<?php echo $sql_res1["category_name"]; ?></option>
<?php
}
?>
</select>
</td>
</tr>
<tr>
<td>Company</td>
<td id="td_company">
<select name="company_id" id="company_id">
<option value="">--Select--</option>
<?php
$sql="select * from company where cat_id='$_REQUEST[cat_id]'";
$sql_row=mysql_query($sql);
while($sql_res=mysql_fetch_assoc($sql_row))
{
?>
<option value="<?php echo $sql_res["id"]; ?>"><?php echo $sql_res["company_name"]; ?></option>
<?php
}
?>
</select>
</td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
</table>
</form>
</body>
</html>
but when i am run this code its gives following error
( ! ) Notice: Undefined index: cat_id in C:\wamp\www\Related combobox\combo.php on line 32
Call Stack
# Time Memory Function Location
1 0.0008 143712 {main}( ) ..\combo.php:0
我们如何解决它................
how we can resolve it................
推荐答案
host = localhost ;
host="localhost";
用户名 = root ;
username="root";
密码 = root ;
password="root";
这篇关于我们如何制作相关的组合框的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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