我正在尝试在选择项目时从数据库输入值（Rating）。我还需要能够更新该评级，然后将该值放入另一个表中。 我的问题是，我正在试图弄清楚如何使文本框中的值与下拉列表中的选择相关。我发现编码可以制作另一个选项框，但无法弄清楚如何制作一个文本框。
回答：最初当我发布问题时，我认为可以在没有JQuery的情况下执行此操作并尝试复制for循环并运行while循环来填充文本框。我现在知道这是不可能的，并想知道如何运行脚本来填充下拉框的更改文本框。问题是该功能必须连接到数据库以及下拉列表。 1.拉下下拉数据（从JOURNAL表中）。 2.从该下拉列表中选择一个日记3.在JOURNAL表中，JournalRating已分配给每个日记帐，并将该值放入文本框中。我试图做的是
<?php
include 'dbc.php';
connect();
//insert form values into database
$sql = "SELECT JournalName, JournalID, Rating, JournalActive from JOURNAL where JournalActive = 1;";
//Can take out JournalActive if we do not want it
$result = mysqli_query($conn, $sql);
if (!$result) {
$message = 'Invalid query: ' . mysql_error() . "\n";
$message .= 'Whole query: ' . $query;
die($message);
echo "there was an issue";
}
$sql2 = "SELECT FName, LName, FacultyID from FACULTY where FacultyActive = 1;";
//Can take out JournalActive if we do not want it
$result2 = mysqli_query($conn, $sql2);
if (!$result2) {
$message = 'Invalid query: ' . mysql_error() . "\n";
$message .= 'Whole query: ' . $query;
die($message);
echo "there was an issue";
}
//array to hold all of the data
$journals = array();
//print out all of the first names in the database
$rownumber = 0;
while ($row = mysqli_fetch_assoc($result)) {
$journals[$rownumber][0] = $row['JournalName'];
$journals[$rownumber][1] = $row['JournalID'];
$journals[$rownumber][2] = $row['JournalRating'];
$journals[$rownumber][3] = $row['JournalActive'];
$rownumber++;
}
$faculty = array();
//print out all of the first names in the database
$rownum = 0;
while ($row = mysqli_fetch_assoc($result2)) {
$faculty[$rownum][0] = $row['FName'];
$faculty[$rownum][1] = $row['LName'];
$faculty[$rownum][2] = $row['FacultyID'];
$rownum++;
}
?>
<!DOCTYPE html>
<head>
<link href="styles.css" rel="stylesheet">
<h1> Miami University </h1>
<h4> Information Systems and Analytics Department </h4>
<script>
(function($){
$(function(){
$("#JournalID").on('change', function() {
$("#JournalRating").val($(this).find("option:selected").data('Rating'));
});
});
})(jQuery);
</script>
</head>
<body>
<div class="StyleDiv" >
<!-- coding for journal -->
<form id="form1" name="form1" method="post" action="RR2.php">
<label for="FacultyID">Faculty Name</label>
<select multiple="multiple" name="FacultyID[]" id="FacultyID">
<?php
for($i = 0; $i < sizeof($faculty); $i++) {
print "<option value=\"" . $faculty[$i][2] . "\">" . $faculty[$i][0] .' '. $faculty[$i][1] . "</option>\r\n";
}
?>
</select>
<br class="clear" />
<br class="clear" />
<label for="JournalID">Journal Name</label>
<select name="JournalID" id="JournalID">
<?php
for($i = 0; $i < sizeof($journals); $i++) {
print "<option value=\"" . $journals[$i][1] . "\" data-rating=\"" . $journals[$i][2] . "\">" . $journals[$i][0] . "</option>\r\n";
}
?>
</select>
<br class="clear"/>
<label for="JournalRating">Journal Rating</label><input type="text" name="JournalRating" id="JournalRating" />
<br class="clear" />
<!-- coding for publication -->
<label for="Title">Publication Title</label><input type="text" name="PubID" id="PubID" />
<br class="clear" />
<label for="Year">Year</label><input type="text" name="Year" id="Year" />
<br class="clear" />
<label for="Volume">Volume</label><input type="text" name="Volume" id="Volume" />
<br class="clear" />
<label for="Issue">Issue</label><input type="text" name="Issue" id="Issue" />
<br class="clear" />
<label for="Comments">Comments</label><textarea name="Comments" id="Comments" cols="45" rows="5"></textarea>
<br class="clear" />
<input type="submit" name="Submit" id="Submit" value="Submit" />
<br class="clear" />
</br>
</br>
</div>
</form>
<?php
//Post Parameters
$JournalID = $_POST['JournalID'];
//for($i = 0; $i < sizeof($journals); $i++) {
//if ($JournalID = $journals[$i][1]) {
//$JournalName = $journals[$i][0];
//}
//}
$Year = $_POST['Year'];
$Comments = $_POST['Comments'];
$Volume = $_POST['Volume'];
$Issue = $_POST['Issue'];
$Title = $_POST['Title'];
$JournalRating = $_POST['JournalRating'];
$FacultyMemID = $_POST['FacultyID'];
//Query
//INSERT
$stmt = $conn->prepare(" INSERT INTO PUBLICATION ( JournalID, Year, Comments, Volume, Issue, Title, JournalRating ) VALUES ( ?, ?, ?, ?, ?, ?, ? )");
$stmt->bind_param('sssssss', $JournalID, $Year, $Comments, $Volume, $Issue, $Title, $JournalRating);
$stmt->execute();
$pubID = $stmt->insert_id;
$facmemid = 0;
$stmt = $conn->prepare(" INSERT INTO FACULTYPUBLICATIONS ( FacultyID, PubID ) VALUES ( ?, ? )");
$stmt->bind_param('ii', $facmemid, $pubID);
//for ($_POST['FacultyID'] as $FacultyMemID) {
for($i = 0; $i < sizeof($FacultyMemID); $i++) {
$facmemid = $FacultyMemID[$i];
$stmt->execute();
}
mysqli_close($conn);
?>
</body>
</html>
答案 0 :(得分：-1)
使用数据属性将评分添加到HTML中：
<select name="JournalID" id="JournalID">
<?php
for($i = 0; $i < sizeof($journals); $i++) {
print "<option value=\"" . $journals[$i][1] . "\" data-rating=\"" . $journals[$i][2] . "\">" . $journals[$i][0] . "</option>\r\n";
}
?>
</select>
然后你可以使用jQuery .data()：
(function($) {
$(function() {
$("#JournalID").on('change', function() {
$("#JournalRating").val($(this).find("option:selected").data('rating'));
});
});
})(jQuery);<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select id="JournalID">
<option>Select a journal</option>
<option value="1" data-rating="3">Journal #1</option>
<option value="2" data-rating="2">Journal #2</option>
<option value="3" data-rating="5">Journal #3</option>
</select>
<br>
Rating: <input id="JournalRating">