我正在尝试填充所有文本框值取决于下拉值选择。而且我还通过sql查询填充下拉值。这是HTML代码：
<select name="name" ID="name" class="form-control">
<option value="Select">Select</option>
<?php
$qu="Select DISTINCT Cname from Client_table";
$res=mysqli_query($con,$qu);
while($r=mysqli_fetch_row($res))
{
echo "<option value='$r[0]'> $r[0] </option>";
}
?>
</select>
<label>Address</label><input type="text" name="add"/>
<label>Contact</label><input type="text" name="con"/>
数据库：
Client_table
C_no Cname Caddress Ccontact
1 Mohit xyz 0123645789
2 Ramesh abc 7485962110
我很困惑，如何根据下拉选择查找客户的地址和联系人，并使用此值填充文本框
答案 0 :(得分：2)
将查询更改为
Select DISTINCT Cname,Caddress,Ccontact from Client_table
并更改以下声明
echo "<option value='$r[0]'> $r[0] </option>";
要
echo '<option data-add="'.$r[1].'" data-con="'.$r[2].'" value='.$r[0].'> '.$r[0].' </option>';
将选择修改为
<select name="name" ID="name" class="form-control" onchange="myFunction()">
添加以下javascript
function myFunction(){
var index = document.getElementById("name").selectedIndex;
var add = document.getElementById("name").options[index].getAttribute("data-add");
var con = document.getElementById("con").options[index].getAttribute("data-con");
document.getElementsByName("add")[0].value = add;
document.getElementsByName("con")[0].value = con;
}
答案 1 :(得分：2)
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname="stack";
// Create connection
try {
$conn = new mysqli($servername, $username, $password, $dbname);
// set the PDO error mode to exception
echo "Connected successfully";
}
catch(PDOException $e)
{
echo "Connection failed: " . $e->getMessage();
}
?>
<select name="name" ID="name" onchange="myFunction()" class="form-control">
<option value="Select">Select</option>
<?php
$qu="Select DISTINCT Cname,Caddress,Ccontact from Client_table";
$res=$conn->query($qu);
while($r=mysqli_fetch_row($res))
{
echo "<option data-add='$r[1]' data-con='$r[2]' value='$r[0]'> $r[0] </option>";
}
?>
</select>
<label>Address</label><input type="text" name="add" id="add"/>
<label>Contact</label><input type="text" name="con" id="con"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
function myFunction(){
var address = $('#name').find(':selected').data('add');
var contact = $('#name').find(':selected').data('con');
$('#add').val(address);
$('#con').val(contact);
}
</script>
希望它能够解决.. 如果您发现任何问题，请通知我。祝您好运。
答案 2 :(得分：1)
一点说明：第一次访问页面（index.php）时，数据会加载到组合框中。每个option代码都会将客户编号作为值（C_no）和其他详细信息接收为文本。
另一方面，当您在组合框中选择一个值时，您需要从数据库中获取其他客户端数据。为此你需要jquery和ajax。有了它，当组合框的值发生变化时，您必须向服务器发出ajax请求（getClient.php）。作为响应，它会向您发送数据库表中的相应数据。然后，您可以将数据放在任何您喜欢的位置 - 在这种情况下输入。
一点建议：我建议你开始使用预准备语句 - 为了避免sql注入 - 并且不要混合php代码从db中使用html代码获取数据。把它们分开。首先，在页面顶部获取数据并将其保存到数组中。然后，在html代码中，仅使用数组迭代获取的数据。
祝你好运。<?php
require 'connection.php';
$sql = 'SELECT C_no, Cname, Caddress FROM Client_table ORDER BY Cname ASC';
// Prepare the statement.
$statement = mysqli_prepare($connection, $sql);
// Execute the statement.
mysqli_stmt_execute($statement);
// Get the result set from the prepared statement.
$result = mysqli_stmt_get_result($statement);
// Fetch the data and save it into an array for later use.
$clients = mysqli_fetch_all($result, MYSQLI_ASSOC);
// Free the memory associated with the result.
mysqli_free_result($result);
// Close the prepared statement. It also deallocates the statement handle.
mysqli_stmt_close($statement);
?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=yes" />
<meta charset="UTF-8" />
<!-- The above 3 meta tags must come first in the head -->
<title>Demo</title>
<script src="https://code.jquery.com/jquery-3.2.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$('#name').change(function (event) {
var cNo = $(this).val();
if (cNo === 'Select') {
$('#address').val('');
$('#contact').val('');
} else {
$.ajax({
method: 'post',
dataType: 'json',
url: 'getClient.php',
data: {
'cNo': cNo
},
success: function (response, textStatus, jqXHR) {
if (!response) {
alert('No client data found.');
} else {
$('#address').val(response.address);
$('#contact').val(response.contact);
}
},
error: function (jqXHR, textStatus, errorThrown) {
alert('An error occurred. Please try again.');
},
cmplete: function (jqXHR, textStatus) {
//...
}
});
}
});
});
</script>
<style type="text/css">
body {
padding: 30px;
}
input, select {
display: block;
margin-bottom: 10px;
}
</style>
</head>
<body>
<div class="container">
<select name="name" id="name" class="form-control">
<option value="Select">- Select -</option>
<?php
foreach ($clients as $client) {
?>
<option value="<?php echo $client['C_no']; ?>">
<?php echo $client['Cname'] . ' (' . $client['Caddress'] . ')'; ?>
</option>
<?php
}
?>
</select>
<label>Address</label>
<input type="text" id="address" name="address"/>
<label>Contact</label>
<input type="text" id="contact" name="contact"/>
</div>
</body>
</html>
<?php
require 'connection.php';
// Validate posted value.
if (!isset($_POST['cNo']) || empty($_POST['cNo'])) {
echo json_encode(FALSE);
exit();
}
$cNo = $_POST['cNo'];
$sql = 'SELECT
Caddress AS address,
Ccontact AS contact
FROM Client_table
WHERE C_no = ?
LIMIT 1';
// Prepare the statement.
$statement = mysqli_prepare($connection, $sql);
/*
* Bind variables for the parameter markers (?) in the
* SQL statement that was passed to prepare(). The first
* argument of bind_param() is a string that contains one
* or more characters which specify the types for the
* corresponding bind variables.
*
* @link http://php.net/manual/en/mysqli-stmt.bind-param.php
*/
mysqli_stmt_bind_param($statement, 'i', $cNo);
// Execute the statement.
mysqli_stmt_execute($statement);
// Get the result set from the prepared statement.
$result = mysqli_stmt_get_result($statement);
// Fetch the data and save it into an array for later use.
$clientDetails = mysqli_fetch_array($result, MYSQLI_ASSOC);
// Free the memory associated with the result.
mysqli_free_result($result);
// Close the prepared statement. It also deallocates the statement handle.
mysqli_stmt_close($statement);
if (!isset($clientDetails) || !$clientDetails) {
echo json_encode(FALSE);
} else {
echo json_encode($clientDetails);
}
exit();
<?php
// Db configs.
define('HOST', 'localhost');
define('PORT', 3306);
define('DATABASE', 'your-db');
define('USERNAME', 'your-user');
define('PASSWORD', 'your-pass');
// Display eventual errors.
error_reporting(E_ALL);
ini_set('display_errors', 1); /* SET IT TO 0 ON A LIVE SERVER! */
// Enable internal report functions.
$mysqliDriver = new mysqli_driver();
$mysqliDriver->report_mode = (MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
// Create db connection.
$connection = mysqli_connect(HOST, USERNAME, PASSWORD, DATABASE, PORT);
DROP TABLE IF EXISTS `Client_table`;
CREATE TABLE `Client_table` (
`C_no` int(11) unsigned NOT NULL AUTO_INCREMENT,
`Cname` varchar(100) DEFAULT NULL,
`Caddress` varchar(100) DEFAULT NULL,
`Ccontact` varchar(100) DEFAULT NULL,
PRIMARY KEY (`C_no`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `Client_table` (`C_no`, `Cname`, `Caddress`, `Ccontact`)
VALUES
(1,'Mohit','xyz','0123645789'),
(2,'Ramesh','abc','7485962110'),
(5,'Tanja','def','1232347589'),
(6,'Paul','pqr','0797565454'),
(7,'Mohit','klm','0123645789');
答案 3 :(得分：1)
JavaScript文件：
function getdata(str) {
if (str == "")
{
document.getElementById("no_of_sms").value = "";
document.getElementById("no_of_days").value = "";
document.getElementById("descr").value = "";
document.getElementById("state-pkg").value = "";
document.getElementById("price-pkg").value = "";
return;
}
if (window.XMLHttpRequest)
{
xmlhttp = new XMLHttpRequest();
}
else
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function() {
if (this.readyState==4 && this.status==200) {
var data = xmlhttp.responseText.split("#");
var db_no_of_sms = decodeURIComponent(data[0]);
var db_no_of_days = decodeURIComponent(data[1]);
var db_f_state = decodeURIComponent(data[2]);
var db_f_price = decodeURIComponent(data[3]);
var db_f_desc = decodeURIComponent(data[4]);
document.getElementById("no_of_sms").value=db_no_of_sms;
document.getElementById("no_of_days").value = db_no_of_days;
document.getElementById("descr").value = db_f_desc;
document.getElementById("state-pkg").value = db_f_state;
document.getElementById("price-pkg").value = db_f_price;
}
}
xmlhttp.open("GET","functions/getdata.php?q="+str,true);
xmlhttp.send();
}
PHP文件：
<?php
$q = $_GET['q'];
$host="localhost";
$db_username="root";
$db_password="";
$con = mysqli_connect("$host", "$db_username", "$db_password");
if (!$con)
{
die('Could not connect: ' . mysqli_error($con));
}
mysqli_select_db($con,"business_details");
$sql="SELECT * FROM packages where p_name = '$q'";
$result = mysqli_query($con,$sql);
$row=mysqli_fetch_assoc($result);
$db_no_of_sms = $row['no_of_sms'];
$db_no_of_days = $row['days'];
$db_f_state = $row['state'];
$db_f_price = $row['price'];
$db_f_desc = $row['description'];
echo
$db_no_of_sms."#".$db_no_of_days."#".$db_f_state."#".$db_f_price."#".$db_f_desc;
?>
答案 4 :(得分：-1)
type: "GET",
dataType: "json",
success: function(data) {
console.log(data[0]['qty']);
$.each(data, function(key, value) {
$('#qty').val(data[0]['qty']);
});
}
});