我有三个页面：test.php、script.js和main.php。
Main.php正在使用html5拖放以及script.js中的一个简单ajax脚本，为了发布到-并激活test.php。（附带说明，我希望main.php将<img id="s1" />作为post变量通过。经过几个小时的研究和大约一百次的测试和修订，我不知道为什么我不能让ondrop触发帖子。任何建议都将不胜感激。这是我的代码：
test.php（包含一个简单的php脚本，加载后将一个通用记录插入我的数据库）
script.js
function drop(id, event) {
$.ajax({
url: "test.php",
type: "POST",
data: {
id: id,
event: event
},
success: function () {
console.log('great success');
return true
}
});
return false;
}
和main.php
<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="/js/jquery.js"></script>
<script type="text/javascript" src="/js/script.js"></script>
<header class="main-header" role="banner"><center>
<img src="lampettalogo.jpg" height="90" width="400"alt="Banner Image"/></center>
</header>
<style>
#1 {width:auto;height:auto;padding:1px;border:1px solid #aaaaaa;}
#2 {width:auto;height:auto;padding:1px;border:1px solid #aaaaaa;}
#3 {width:auto;height:auto;padding:1px;border:1px solid #aaaaaa;}
#4 {width:auto;height:auto;padding:1px;border:1px solid #aaaaaa;overflow: auto;}
</style>
</head>
<body>
<div id="1" ondrop="drop(event)" ondragover="allowDrop(event)">
<?php
include "database_connection.php";
///////////////////////////////////////////////////////////////////////////////////////////////
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s'n", mysqli_connect_error());
exit();
}
else
{
}
$query = "SELECT * FROM ss where currentZone = 1";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<img id='{$row["sID"]}' src='{$row["photoLink"]}.jpg' draggable='true' ondragstart='drag(event)' width='75' height='75'>" ;
}
/* free result set */
mysqli_free_result($result);
}
mysqli_close($link);
/////////////////////////////////////////////////////////////////////////////////
?>
</div>
<div id="2" ondrop="drop(event)" ondragover="allowDrop(event)">
<?php
include "database_connection.php";
$query = "SELECT * FROM ss where currentZone = 2";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<img id='{$row["sID"]}' src='{$row["photoLink"]}.jpg' draggable='true' ondragstart='drag(event)' ondrop='drop(event)' width='75' height='75'>" ;
}
/* free result set */
mysqli_free_result($result);
}
mysqli_close($link);
?>
</div>
<div id="3" ondrop="drop(event)" ondragover="allowDrop(event)">
<?php
include "database_connection.php";
$query = "SELECT * FROM ss where currentZone = 3";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<img id='{$row["sID"]}' src='{$row["photoLink"]}.jpg' draggable='true' ondragstart='drag(event)' width='75' height='75'>" ;
}
/* free result set */
mysqli_free_result($result);
}
mysqli_close($link);
?>
</div>
<div id="4" ondrop="drop(event)" ondragover="allowDrop(event)">
<?php
include "database_connection.php";
$query = "SELECT * FROM ss where currentZone = 4";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<img id='{$row["sID"]}' src='{$row["photoLink"]}.jpg' draggable='true' ondragstart='drag(event)' width='75' height='75'>" ;
}
/* free result set */
mysqli_free_result($result);
}
mysqli_close($link);
?>
</div>
<div id="4" ondrop="drop(event)" ondragover="allowDrop(event)">
<?php
include "database_connection.php";
$query = "SELECT * FROM ss where currentZone = 0";
if ($result = mysqli_query($link, $query)) {
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<img id='{$row["sID"]}' src='{$row["photoLink"]}.jpg' draggable='true' ondragstart='drag(event)' width='75' height='75'>" ;
}
/* free result set */
mysqli_free_result($result);
}
mysqli_close($link);
?>
</div>
</body>
</html>
在drop(id, e)方法中，除了allowDrop方法外，还可以考虑以下内容。使用FileReader类读取文件。
function drop(id, e) {
if (e.dataTransfer && e.dataTransfer.files.length != 0) {
var file = e.dataTransfer.files[0], // Only the first file.
reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = function (event) {
console.log(file.name);
$.ajax({
url: "test.php",
type: "POST",
data: {
id: id,
fileName: file.name, // Your file name.
file: event.target.result // Your file.
},
success: function () {
console.log('great success');
return true
}
});
};
}
}
在HTML中，还需要在id中传递一个值。例如，可以执行以下操作将$row["sID"]打印到方法参数中。
<div id="1" ondrop="drop('<?php echo $row["sID"]; ?>', event)" ondragover="allowDrop(event)">
在您的PHP脚本上，您需要能够接收POSTed文件。下面显示了一个示例。
$data = $_POST['file'];
$fileName = $_POST['fileName'];
$id = $_POST['id'];
$serverFile = $fileName . "-" . time(); // Appends timestamp so that files of the same name wouldn't be overwritten.
$fp = fopen('/uploads/' . $serverFile, 'w');
fwrite($fp, $data);
fclose($fp);
$returnData = array( "serverFile" => $serverFile );
echo json_encode($returnData);
请参阅此plunker以获取示例。将一个文件放入div中，并查看控制台日志。
编辑
理解您想要拖放元素。
以下是更新后的plunker。