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这是场景：我管理员将添加所选学生将其放在候选人列表中。该过程是我将使用下拉列表。使用两个下拉列表（数据库中的数据）
我有两个表tbstudent（这是数据将来自）。另一个表格是tbposition（需要的表格可以在tbcandidates上获取并添加）和表格tbcandidates（其中将添加数据）。
所以这是页面，管理员会挑选候选人，并把位置
第一个下拉列表是采摘的学生。通过在下拉列表中选择她的姓名，该学生的所有其他行都需要输入，如（student_name，student_gender，student_section）。是的，它通过在下拉列表中选择她的名字来添加并获取所有行，但问题是：
是的，它添加了所选学生的所有行，但它只添加了相同的数据桌子的顶部。正如你所看到的表pf tbstudent上的数据是简Rechell谁是女性，另一个是男性，但是当我在下拉列表中添加tbstudent的数据时，所有选择的候选人都获得了第一行的数据即使他们是男性，他们全部都成为女性。
顺便说一句，另一个下拉列表是选择是从表中检索位置tbposition
<?php
session_start();
require('../connection.php');
//If your session isn't valid, it returns you to the login screen for protection
if(empty($_SESSION['admin_id'])){
header("location:access-denied.php");
}
//retrive candidates from the tbcandidates table
$result=mysql_query("SELECT * FROM tbCandidates")
or die("There are no records to display ... \n" . mysql_error());
if (mysql_num_rows($result)==0){
}
?>
<?php
// retrieving positions sql query
$positions_retrieved=mysql_query("SELECT * FROM tbPositions")
or die("There are no records to display ... \n" . mysql_error());
$name_retrieved=mysql_query("SELECT * FROM tbstudent")
or die("There are no records to display ... \n" . mysql_error());
$row = mysql_fetch_array($name_retrieved);
if($row)
{
//get data from db
$name = $row['student_name'];
$gender =$row['student_gender'];
$grade =$row['student_grade'];
$section =$row['candidate_section'];
}
?>
<?php
// inserting sql query
if (isset($_POST['Submit']))
{
$newCandidateName = $_POST['name']; //prevents types of SQL injection
$newCandidatePosition = $_POST['position'];
$sql = mysql_query("INSERT INTO tbCandidates(candidate_name,candidate_gender,candidate_grade,candidate_section,candidate_position) VALUES ('$newCandidateName','$gender','$grade','$section','$newCandidatePosition')")
or die("Could not insert candidate at the moment". mysql_error());
// redirect back to candidates
header("Location: candidates.php");
}
?>
<?php
// deleting sql query
// check if the 'id' variable is set in URL
if (isset($_GET['id']))
{
// get id value
$id = $_GET['id'];
// delete the entry
$result = mysql_query("DELETE FROM tbCandidates WHERE candidate_id='$id'")
or die("The candidate does not exist ... \n");
// redirect back to candidates
header("Location: candidates.php");
}
else
// do nothing
?>
<!DOCTYPE>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Administration Control Panel:Candidates</title>
<link href="css/admin_styles.css" rel="stylesheet" type="text/css" />
<script language="JavaScript" src="js/admin.js">
</script>
</head>
<body bgcolor="tan">
<div id="mySidenav" class="sidenav">
<a href="javascript:void(0)" class="closebtn" onclick="closeNav()">×</a>
<a href="admin.php">HOME</a>
<a href="positions.php">MANAGE POSITION</a>
<a href="candidates.php">MANAGE CANDIDATES</a>
<a href="refresh.php">POLL RESULTS</a>
<a href="logout.php">LOGOUT</a>
</div>
<div id="main">
<span style="font-size:30px;cursor:pointer" onclick="openNav()">☰ </span>
<div id="page">
<div id="header">
<h1>MANAGE CANDIDATES</h1>
</div>
<div id="container">
<table width="380" align="center">
<CAPTION><h3>ADD NEW CANDIDATE</h3></CAPTION>
<form name="fmCandidates" id="fmCandidates" action="candidates.php" method="post" onsubmit="return candidateValidate(this)">
<tr>
<td>Candidate Name</td>
<!--<td><input type="combobox" name="name" value="<?php echo $name; ?>"/></td>-->
<td><SELECT NAME="name" id="name">select
<OPTION VALUE="select">select
<?php
//loop through all table rows
while ($row=mysql_fetch_array($name_retrieved)){
echo "<OPTION VALUE=$row[student_name]>$row[student_name]>$row[student_grade]";
//mysql_free_result($positions_retrieved);
//mysql_close($link);
}
?>
</SELECT>
</td>
</tr>
<tr>
<td>Candidate Position</td>
<!--<td><input type="combobox" name="position" value="<?php echo $positions; ?>"/></td>-->
<td><SELECT NAME="position" id="position">select
<OPTION VALUE="select">select
<?php
//loop through all table rows
while ($row=mysql_fetch_array($positions_retrieved)){
echo "<OPTION VALUE=$row[position_name]>$row[position_name]";
//mysql_free_result($positions_retrieved);
//mysql_close($link);
}
?>
</SELECT>
</td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="Submit" value="Add" /></td>
</tr>
</table>
<hr>
<table border="0" width="620" align="center">
<CAPTION><h3>AVAILABLE CANDIDATES</h3></CAPTION>
<tr>
<th>Candidate Name</th>
<th>Gender</th>
<th>Grade</th>
<th>Section</th>
<th>Candidate Position</th>
<th>Image</th>
</tr>
<?php
mysql_connect("localhost", "root","") or die(mysql_error());
//Connect to server
mysql_select_db("poll") or die("Cannot connect to database"); //connect to database
$result = mysql_query("Select * from tbcandidates"); // SQL Query
while($row = mysql_fetch_array($result))
{
Print "<tr>";
Print '<td align="center">'. $row['candidate_name'] . "</td>";
Print '<td align="center">'. $row['candidate_gender'] . "</td>";
Print '<td align="center">'. $row['candidate_grade'] . "</td>";
Print '<td align="center">'. $row['candidate_section'] . "</td>";
Print '<td align="center">'. $row['candidate_position'] . "</td>";
Print '<td><img src="date:image/jpeg;base64,' .base64_encode($row['img']).'"height="60 width="75 /></td>';
Print '<td align="center"><a href="#" onclick="myFunction('.$row['candidate_id'].')">delete</a> </td>';
Print '<td align="center">'. $row['available']. "</td>";
Print "</tr>";
}
mysql_free_result($result);
mysql_close($link);
?>
</table>
<script>
function myFunction(candidate_id)
{
var r=confirm("Are you sure you want to delete this record?");
if (r==true)
{
window.location.assign("delete.php?id=" + candidate_id);
}
}
</script>
<hr>
</div>
<div id="footer">
<div class="bottom_addr">
</div>
</div>
</div>
<style>
</script>
</body>
</html>
请帮助我。 –