此 jQuery 脚本返回 null。我已经尝试对选定的选项使用其他语法,但下面是我得到的:
该脚本运行正常,允许我下载 Excel 文件。但是 ID 未正确设置(通过选择的选项),因此解析为“0”。
<script>
//When Page Loads....
$(document).ready(function(){
$('#dropdown').change(function(){
// Call the function to handle the AJAX.
// Pass the value of the text box to the function.
sendValue($(this).val());
});
});
// Function to handle ajax.
function sendValue(str){
// post(file, data, callback, type); (only "file" is required)
$.post(
"scripts/export_to_excel/index.php", //Ajax file
{ sendValue: str }, // create an object will all values
//function that is called when server returns a value.
function(data){
$('#linkDiv').html(data.returnValue);
},
//How you want the data formatted when it is returned from the server.
"json"
);
}
</script>
选择 HTML
<p>Select event for export to Excel:</p>
<p>
<select name="eventIDExport" id="dropdown">
<option value=0>
<?=$options?>
</select>
</p>
<?php var_dump($_POST['eventIDExport']); ?>
<div id="linkDiv"></div>
渲染标记
<p>Select event for export to Excel:</p>
<p>
<select name="eventIDExport" id="dropdown">
<option value=0>
<option value="1">BIG event</option>
<option value="54">2013 Network Conference</option>
</select>
</p>
NULL
<div id="linkDiv"></div>
index.php 中用于处理 Ajax 请求的一些代码 - 我认为这是触发 null 值?
if (isset($_POST['eventIDExport']))
{
$eventIDExport = $_POST['eventIDExport'];
}else{
$eventIDExport = "";
}