[英]Drag and Drop(event) not trigger ajax POST
我有三個頁面:test.php,script.js和main.php。
Main.php正在使用html5拖放以及來自script.js的簡單ajax腳本,以便發布並激活test.php。 (旁注,我希望main.php將<img id="s1" />
作為POST變量傳遞。經過幾個小時的研究和大約一百次測試和修改,我無法弄清楚為什么我無法得到ondrop觸發帖子。非常感謝任何建議。這是我的代碼:
test.php(包含一個簡單的php腳本,加載時將通用記錄插入我的DB)
的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
方法之外,還可以考慮以下內容。 使用FileReader
類讀取您的文件。
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);
$.ajax({
url: "test.php",
type: "POST",
data: {
id: id,
fileName: file.name, // Your file name.
file: event.target.result // Your file.
},
success: function () {
console.log('great success');
return true
}
});
};
}
}
在HTML中,您還需要傳遞id
的值。 例如,您可以執行以下操作將$row["sID"]
打印到method參數中。
<div id="1" ondrop="drop('<?php echo $row["sID"]; ?>', event)" ondragover="allowDrop(event)">
在PHP腳本上,您需要能夠接收POST
ed文件。 一個例子如下所示。
$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);
有關示例,請參閱此plunker 。 將文件拖放到div中,然后觀察控制台日志。
編輯
理解你想要拖放元素。
以下是更新的plunker 。
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