我有這個問題,爲了改變頁面內容我必須接收用戶輸入。我想通過彈出窗體來做到這一點。點擊彈出按鈕「提交」後,我想將表單輸入發送到一個php
文件,在該文件中,我連接到數據庫並通過JSON將檢索到的信息發送到js
文件,我使用$.post()
方法來實現所有這些。問題是頁面內容的內容被改變而沒有重新加載,我被重定向到頁面http://localhost/statistics.php?major=KN&year=2011
,但我想留在頁面http://localhost/statistics.php
。這就是爲什麼我首先使用AJAX。 major=KN
& year=2011
是我的POST參數。提交彈出窗體後是否可以更改頁面的內容?任何幫助將不勝感激。提交彈出窗體後用AJAX更改頁面內容
這裏是我認爲可能是相關的解決問題的代碼:
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="ch/Chart.js"></script>
<script src="js/statistics_js.js"></script>
</head>
<body>
<div id="content">
<div id="abc">
<div id="popupContact">
<form id="form1" name="form1">
<img class="close" src="images/3.png" onclick ="div_hide_group_popup()">
<h2>Fill the form</h2>
<hr>
<input name="major" placeholder="Major" type="text">
<input name="year" placeholder="Year" type="number">
<button id="submit1">Submit</button>
</form>
</div>
</div>
<div id="page">
<canvas id="myChart"></canvas>
</div>
<aside>
<h3>Compare</h3>
<ul>
<li id="group"><a href="#">groups</a></li>
</ul>
</aside>
</div>
</body>
</html>
的js/statistics_js.js
文件:
function error(){
alert('Error!');
}
$(document).ready(function(){
$('#group').on('click', function(e) {
e.preventDefault();
document.getElementById('abc').style.display = "block";
});
});
$(document).ready(function(){
$("#submit1").click(function() {
$.post("http://localhost/group_sort.php", $("#form1").serialize(), "JSON").done(function(data) {
//This should use the Chart.js library to draw a chart on the canvas with the data retrieved from the server.
var barChartData = {
labels : data.groups,
datasets : [
{
fillColor : "rgba(151,187,205,0.5)",
strokeColor : "rgba(151,187,205,0.8)",
highlightFill : "rgba(151,187,205,0.75)",
highlightStroke : "rgba(151,187,205,1)",
data : data.groups_total_points
}
]
}
var ctx = document.getElementById("myChart").getContext("2d");
window.myBar = new Chart(ctx).Bar(barChartData, {
responsive : true
});
}).error(error);
});
});
function div_hide_group_popup(){
document.getElementById('abc').style.display = "none";
}
我group_sort.php
:
<?php
require "config.php";
try {
$conn = new PDO("mysql:host=" . DB_SERVER . ";dbname=" . DB_NAME, DB_USERNAME, DB_PASSWORD);
}
catch(PDOException $e) {
die("Database connection could not be established.");
}
$conn->exec("SET NAMES UTF8");
$major = $_POST['major'];
$year = $_POST['year'];
$sql = "SELECT result.group, SUM(result.grade) AS group_total_points
FROM (
SELECT *
FROM students AS s
INNER JOIN points AS p
ON s.fn = p.student_fn
) result
WHERE result.major = '$major' AND result.year = '$year'
GROUP BY result.group
ORDER BY group_total_points DESC";
$query = $conn->query($sql);
if($query->rowCount() > 0) {
$data = array (
"groups" => [],
"groups_total_points" => [],
);
while ($row = $query->fetch(PDO::FETCH_ASSOC)) {
$data["groups"][] = $row["group"];
$data["groups_total_points"][] = $row["group_total_points"];
}
echo json_encode($data);
}
else {
echo mysql_error();
}
$conn = null;
?>
這是它應該這樣做 - 將輸入從表單發送到'php'文件。現在,我做了你所說的,雖然我從error()函數中得到了一個警告「錯誤」。任何想法如何看看它來自哪裏? – mariya 2015-02-05 17:56:13
不,你想通過Ajax獲得輸入,而不是提交表單。可能發生的情況是您的表單正在提交,頁面正在刷新,並且您的Ajax調用從未被執行。當您阻止默認設置時,您的Ajax代碼被使用並出現錯誤。什麼是錯誤信息? – bobdye 2015-02-05 18:00:43
這只是「錯誤!」因爲這就是我的'error()'方法的主體。任何想法如何改變它,讓我得到實際的錯誤? – mariya 2015-02-05 18:04:06