假设我有这种形式:
<form action="Change-status.php" method="post">
<select class="changeStatus" name="changeStatus">
<option value="0">Starting</option>
<option value="1">Ongoing</option>
<option value="2">Over</option>
</select>
<input class="projectId" type="hidden" name="projectId" value="<?php echo $data['id'];?>"/>
</form>
我目前正在使用此脚本提交表单,但这意味着刷新:
$('select').change(function ()
{
$(this).closest('form').submit();
});
我想要做的是在选择更改上发送表单而不刷新页面。我知道我必须使用AJAX这样做,但我无法弄清楚如何实现它。
你能指导我如何做到这一点吗?
感谢您的帮助。
编辑:
在考虑了评论之后,我最终得到了以下代码:
Html:
<form action="" method="post">
<select class="changeStatus" name="changeStatus">
<option value="0">Starting</option>
<option value="1">Ongoing</option>
<option value="2">Over</option>
</select>
<input class="projectId" type="hidden" name="projectId" value="<?php echo $data['id'];?>"/>
</form>
JS:
$(document).ready(function() {
$('select.changeStatus').change(function(){
$.ajax({
type: 'POST',
url: 'Change-status.php',
data: {selectFieldValue: $('select.changeStatus').val(), projectId: $('input[name$="projectId"]').val()},
dataType: 'html'
});
});
});
PHP:
<?php
include('../Include/Connect.php');
$changeStatus=$_POST['selectFieldValue'];
$id=$_POST['projectId'];
$sql='UPDATE project SET progress="'.$changeStatus.'" WHERE id="'.$id.'"';
mysql_query($sql) or die("Erreur: ".mysql_error());
?>
答案 0 :(得分:7)
让跨浏览器onchange
事件和AJAX请求正常工作并非易事。我建议您使用某种类型的javascript框架,它会消除所有跨浏览器问题,因此您不必担心它们。
尝试使用js框架
Jquery只是一个这样的框架,其中包含.change()
等方法,它为执行GET请求的<select>
和.get()
等元素的更改事件附加处理程序
这里有一些代码可以帮助您入门: -
// The $ is the shorthand for a jquery function, you can then use jquery
// selectors which are essentially the same as css selectors, so here
// we select your select field and then bind a function to
// it's change event handler
$('select.changeStatus').change(function(){
// You can access the value of your select field using the .val() method
alert('Select field value has changed to' + $('select.changeStatus').val());
// You can perform an ajax request using the .ajax() method
$.ajax({
type: 'GET',
url: 'changeStatus.php', // This is the url that will be requested
// This is an object of values that will be passed as GET variables and
// available inside changeStatus.php as $_GET['selectFieldValue'] etc...
data: {selectFieldValue: $('select.changeStatus').val()},
// This is what to do once a successful request has been completed - if
// you want to do nothing then simply don't include it. But I suggest you
// add something so that your use knows the db has been updated
success: function(html){ Do something with the response },
dataType: 'html'
});
});
有些参考文献会比我的解释更好
请注意,要使此代码生效,您需要在页面上包含带有<script>
标记的jquery库。
请参阅here for a quick start guide on using jquery
And here for a beginners tutorial on how to use jquery's ajax()
method