我有一个包含4列的HTML表:SKU Group,Group_ID,Edit按钮和Delete按钮。我现在正在处理删除功能并且想要它,这样每当我按下删除按钮时,弹出一个确认框然后如果" OK"按下它,它将删除该行并发送删除查询,从数据库中删除它。
我知道我将使用Ajax和一个单独的PHP脚本来进行删除查询,但似乎无法弄明白。任何帮助表示赞赏!
删除按钮的HTML:
<td><input type="button" class="delete" name="delete" value="Delete" onclick="deleteRow(this)"></td>
JavaScript ......我知道这需要一些工作但是为了我的问题发布它:
function deleteRow(r) {
if (confirm('Are you sure you want to delete this entry?')) {
var i = r.parentNode.parentNode.rowIndex;
document.getElementById("skuTable").deleteRow(i);
}
request = $.ajax({
type: "POST",
url: "delete.php",
data: i
});
request.done(function (response, textStatus, jqXHR){
if(JSON.parse(response) == true){
console.log("row deleted");
} else {
console.log("row failed to delete");
}
});
// Callback handler that will be called on failure
request.fail(function (jqXHR, textStatus, errorThrown){
// Log the error to the console
console.error(
"The following error occurred: "+
textStatus, errorThrown
);
});
// Callback handler that will be called regardless
// if the request failed or succeeded
request.always(function () {
});
}
delete.php:
<?php
$SKU_Group = $_POST['SKU Group'];
$Group_ID = $_POST['Group_ID'];
$host="xxxxxx";
$dbName="xxxxxx";
$dbUser="xxxxxxxxxxxxxx";
$dbPass="xxxxxxxxxxx";
$pdo = new PDO("sqlsrv:server=".$host.";Database=".$dbName, $dbUser, $dbPass);
$delete = "DELETE FROM SKU_Group_Dim WHERE Group_ID = '$Group_ID'";
$stmt = $pdo->prepare($delete);
$result = $stmt->execute();
echo json_encode($result);
if(!$result) {
echo json_encode(sqlsrv_errors());
}
?>
答案 0 :(得分:1)
<强>的JavaScript 强>
首先,我注意到你正在使用jQuery,为什么不尝试充分利用它呢?
首先为onclick
按钮创建.delete
事件处理程序。
$('.delete').click(function () {
// do something when delete button is clicked
});
您只想在用户确认已从数据库中成功删除 AND 后删除该行。
if (confirm('Are you sure you want to delete this entry?')) {
// shorter call for doing simple POST request
$.post('delete.php', data, function (response) {
// do something with response
}, 'json');
// ^ to indicate that the response will be of JSON format
}
但是应该将data
传递到$.post()
以便我们知道要删除哪条记录?好吧,可能是我们要删除的记录的ID。
<强> HTML 强>
由于您尚未发布大量HTML,因此我们假设您构建了如下表格:
<table class="skuTable">
<tr>
<td>123</td><!-- sku group -->
<td>456</td><!-- group id -->
<td><input type="button" class="edit" name="edit" value="Edit" ... ></td>
<td><input type="button" class="delete" name="delete" value="Delete" onclick="deleteRow(this)"></td>
</tr>
<!-- more similar records -->
</table>
更改它,以便您可以轻松查找和访问组的ID,例如向您的单元格添加一个类。 (由于我们已经创建了onclick
处理程序,因此您不再需要为onclick
按钮使用.delete
属性。)
<table class="skuTable">
<tr>
<td class="skuGroup">123</td>
<td class="groupId">456</td>
<td><input type="button" class="edit" name="edit" value="Edit" ... ></td>
<td><input type="button" class="delete" value="Delete"></td>
</tr>
<!-- more similar records -->
</table>
JavaScript(再次)
您可以通过遍历使用jQuery轻松找到关联的ID。现在把所有东西放在一起:
$('.delete').click(function () {
var button = $(this),
tr = button.closest('tr');
// find the ID stored in the .groupId cell
var id = tr.find('td.groupId').text();
console.log('clicked button with id', id);
// your PHP script expects GROUP_ID so we need to pass it one
var data = { GROUP_ID: id };
// ask confirmation
if (confirm('Are you sure you want to delete this entry?')) {
console.log('sending request');
// delete record only once user has confirmed
$.post('delete.php', data, function (res) {
console.log('received response', res);
// we want to delete the table row only we received a response back saying that it worked
if (res.status) {
console.log('deleting TR');
tr.remove();
}
}, 'json');
}
});
<强> PHP 强>
人们使用预备语句的原因之一是防止攻击。你尝试使用它很好,但是你没有正确使用它(阅读周杰伦的评论)。 您希望将变量绑定到SQL中的参数。您可以通过在PDOStatement::execute()函数中传递变量数组来完成此操作。
删除记录时,通过使用PDOStatement::rowCount()检查受影响的记录数来检查记录是否有效。
我从来没有理由检查execute()
是否有效。
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);
//$SKU_Group = $_POST['SKU Group'];
$Group_ID = $_POST['Group_ID'];
$host="xxxxxx";
$dbName="xxxxxx";
$dbUser="xxxxxxxxxxxxxx";
$dbPass="xxxxxxxxxxx";
$pdo = new PDO("sqlsrv:server=".$host.";Database=".$dbName, $dbUser, $dbPass);
$stmt = $pdo->prepare("DELETE FROM SKU_Group_Dim WHERE Group_ID = ?");
$stmt->execute(array($Group_ID));
// send back the number of records it affected
$status = $stmt->rowCount() > 0;
// send back a JSON
echo json_encode(array('status' => $status));
// nothing else can be outputted after this
?>
当然,这还没有经过测试,因此可能存在很少的错误。如果您打开浏览器的控制台日志,则可以按照日志查看发生的情况。