我想根据选择的下拉值通过 ajax onchange 事件填充我的 div minimum_table。这<div class="minimal_table">
是我每次从下拉表单中选择值时要更新的页面区域。但是,在我的内容加载后,它不会从我的数据库中返回任何值。我已经使用警报检查了在我的 javascript 中传递的值,但它返回了正确的值。other_function.php
if(isset($val_id))
我还注意到,即使我已经在下拉列表中选择了一个值,它似乎也不会在该行中返回 true 。有人可以帮我指出我的代码有什么问题以及我缺少什么吗?非常感谢。这是我的代码:
my_courses.php(ajax 部分)
$(':input').change(function(event){
event.preventDefault();
$('.minimal_table').html('<img src="../images/loading_trans.gif" style="position:relative; margin:350px; margin-top:250px;" />');
alert($(this).val());
var val_id = $(this).val();
var postData = {'val_id':val_id};
$.ajax({
url: "../includes/other_functions.php",
async: false,
type: "POST",
data: postData,
dataType: "html",
success: function(data){
setTimeout(function(){
$('.minimal_table').html(data);
},2000);
console.log(data);
},
});
});
other_functions.php
<?php
function ajax_request_val(){
$val_id = $_POST['val_id'];
$field = "course_type";
if(isset($val_id)){
$plans = db::getTable('plan',$field,$val_id);
foreach ($plans as $plan) {
if (eventAccessLevel(null, $plan['plan_id']) != EVENT_ACCESS_NONE) {
$course_array[] = getCourseDetails(null, $plan['plan_id']);
$pid_shown[] = $plan['plan_id'];
}
}
$events = db::getTable('tbl_event',$field,$val_id);
foreach ($events as $event) {
if (!in_array($event['plan_id'], $pid_shown)) {
$event_id = $event['event_id'];
if (eventAccessLevel($event_id, null) != EVENT_ACCESS_NONE) {
$course_array[] = getCourseDetails($event_id, null);
}
}
}
return $course_array;
}
else{
$plans = db::getTable('plan');
foreach ($plans as $plan) {
if (eventAccessLevel(null, $plan['plan_id']) != EVENT_ACCESS_NONE) {
$course_array[] = getCourseDetails(null, $plan['plan_id']);
$pid_shown[] = $plan['plan_id'];
}
}
$events = db::getTable('tbl_event');
foreach ($events as $event) {
if (!in_array($event['plan_id'], $pid_shown)) {
$event_id = $event['event_id'];
if (eventAccessLevel($event_id, null) != EVENT_ACCESS_NONE) {
$course_array[] = getCourseDetails($event_id, null);
}
}
}
return $course_array;
}
}
?>
数据库连接.php
public static function getTable($tableName,$field='',$type_id='') {
if (!self::$db) self::connect();
if(!empty($type_id)){
$tableName = self::$db->escape_string($tableName);
return self::getObjects('SELECT * FROM `' . $tableName . '` WHERE `'. $field .'` = `'. $type_id .'`;');
}
else{
$tableName = self::$db->escape_string($tableName);
return self::getObjects('SELECT * FROM `' . $tableName . '`;');
}
}
输出:
初始负载
加载表单下拉菜单搜索
从下拉列表中选择值返回由警报指示的正确值
内容加载后(在 div mini_table 上不返回任何值)