美好的一天,我正在根据一些下拉菜单通过 ajax 显示表单。用户可以在一个下拉列表中选择类,在另一个下拉列表中选择主题,然后返回该类中的学生列表。
这是以类似的方式形成的,允许用户输入学生已经获得的分数。这是用户选择其首选项后表单的外观:
我想在点击保存按钮时,在用户输入分数后,应将其发送到数据库。 我遇到的问题很少:
create_score.php
)时,就像没有通过表单发送任何值一样。我知道这是因为我var_dump($_POST)
并且它返回array(0) { }
这是我用来返回文件的脚本:
$(document).ready(function() {
$('#subject_id').on('change', function(){
var subject_id = $('#subject_id').val();
var class_id = $('#class_id').val();
var term = $('#term').val();
if (subject_id != '' || class_id != '') {
$.ajax({
url:"includes/ajax/read_student_score_form.php",
method:"post",
data:{"subject":subject_id, "class":class_id, "term":term},
dataType:"text",
success:function(data){
$("#result").html(data);
}
});
} else {
$("#result").html('');
}
});
$('#class_id').on('change', function(){
var subject_id = $('#subject_id').val();
var class_id = $('#class_id').val();
var term = $('#term').val();
if (subject_id != '' || class_id != '') {
$.ajax({
url:"includes/ajax/read_student_score_form.php",
method:"post",
data:{"subject":subject_id, "class":class_id, "term":term},
dataType:"text",
success:function(data){
$("#result").html(data);
}
});
} else {
$("#result").html('');
}
});
$('#term').on('change', function() {
/* Act on the event */
var subject_id = $('#subject_id').val();
var class_id = $('#class_id').val();
var term = $('#term').val();
if (subject_id != '' || class_id != '') {
$.ajax({
url:"includes/ajax/read_student_score_form.php",
method:"post",
data:{"subject":subject_id, "class":class_id, "term":term},
dataType:"text",
success:function(data){
$("#result").html(data);
}
});
} else {
$("#result").html('');
}
});
当单击提交时,我是如何构建我的代码以将值发布到负责插入记录的文件(create_score.php
)
$(document).on('click', '#savebtn', function(event) {
event.preventDefault();
// this is where I'm testing if the button is working
alert("Button click");
console.log("Button click for console");
var form = $('#st_score_form');
var formdata = form.serialize();
$.post("includes/ajax/create_score.php", formdata)
.done(function(data){
$("#success").fadeIn('slow', function(){
$("#success").html('<div class="alert alert-info alert-dismissible"><button type="button" class="close" data-dismiss="alert" aria-hidden="true"><i class="glyphicon glyphicon-remove-circle"></i></button><b><i class="fa fa-check"></i>Alert! </b>'+data+'</div>');
});
})
.fail(function(data){
$("#success").fadeIn('slow', function(){
$("#success").html('<div class="alert alert-warning alert-dismissible"><button type="button" class="close" data-dismiss="alert" aria-hidden="true"><i class="glyphicon glyphicon-remove-circle"></i></button><b><i class="fa fa-warning"></i>Alert! </b>'+data+'</div>');
});
});
});
$('body').append('<button id="#savebtn"></button>');
这就是我返回表单(read_student_score_form.php
)的方式:
if (mysqli_num_rows($result) > 0) {
# code...
$output .= '<h4 align="center">Periodic Report</h4>';
$output .= '<div class="table-responsive">
<table class="table table-bordered">
<tr>
<th scope="row" colspan="1">Subject</th>
<td colspan="5">'.$subject["subject_name"].'</td>
<th scope="row">Class</th>
<td>'.$class['class_name'].'</td>
<th scope="row">Period</th>
<td>'.$period.'</td>
</tr>';
$output .= '</table>';
$output .= '<table class="table table-bordered table-condensed table-responsive table-striped">
<thead>
<tr>
<th>Student</th>
<th>Score</th>
<th>Operations</th>
</tr>
</thead>';
$output .= '<tbody>';
while ($row = mysqli_fetch_array($result)) {
# code...
$output .= '<form action="#" method="post" id="st_score_form">';
// unseen fields values that will be send
$output .= '<tr style="display: none;">';
$output .= '<td><input type="text" name="student_id" value="'.$row['student_id'].'"></td>';
$output .= '<td><input type="text" name="subject_id" value="'.$subject_id.'"></td>';
$output .= '<td><input type="text" name="class_id" value="'.$class_id.'"></td>';
$output .= '<td><input type="text" name="term" value="'.$term.'"></td>';
$output .= '</tr>';
// -- end of unseen fields
$output .= '<tr>';
$output .= '<td>'.$row["first_name"]." ".substr($row["middle_name"], 0, 1).". ".$row["surname"].'</td>';
$output .= '<div class="form-group">';
$output .= '<td><input type="number" min="59" max="100" name="score" class="form-control" required="required"></td>';
$output .= '<td><input type="submit" name="savebtn" id="savebtn" value="Save" class="btn btn-info form-control"></td>';
$output .= '</div>';
$output .= '</tr>';
$output .= '</form>';
}
$output .= '</tbody>';
$output .= '</table>';
$output .= '</div>';
echo $output;
} else {
echo "Data not found";
}
负责插入记录的文件内容(create_score.php
)
if (isset($_POST)){
// just testing to see values posted
echo var_dump($_POST);
}
我愿意提供有关如何使其发挥作用的反馈和建议。感谢!!!
更新这就是我现在显示表单的方式
$output .= '<form action="#" method="post" id="st_score_form">';
while ($row = mysqli_fetch_array($result)) {
# code...
// unseen fields values that will be send
$output .= '<tr style="display: none;">';
$output .= '<td><input type="text" id="student_id" name="student_id" value="'.$row['student_id'].'"></td>';
$output .= '<td><input type="text" name="subject_id" value="'.$subject_id.'"></td>';
$output .= '<td><input type="text" name="class_id" value="'.$class_id.'"></td>';
$output .= '<td><input type="text" name="term" value="'.$term.'"></td>';
$output .= '</tr>';
// -- end of unseen fields
$output .= '<tr>';
$output .= '<td>'.$row["first_name"]." ".substr($row["middle_name"], 0, 1).". ".$row["surname"].'</td>';
$output .= '<div class="form-group">';
$output .= '<td><input type="number" min="59" max="100" name="score" class="form-control" required="required"></td>';
$output .= '<td><input type="submit" name="savebtn" id="savebtn" value="Save" class="btn btn-info form-control"></td>';
$output .= '</div>';
$output .= '</tr>';
}
$output .= '</form>';
答案 0 :(得分:0)
您有多个具有相同ID的元素,具体为
id="savebtn"
第一个附加了jQuery,第二个来自电线,你也尝试添加那个......这可能是一个混乱,尝试隔离或更改按钮引用,或类,尝试切换到班级和沟渠ID一劳永逸,我很久以前就做过,我的生活变得更好了:)
另外,您的问题编号 1)尝试以与其他事件相同的方式添加检查
$(document).on('click', '#savebtn', function(event) {
event.preventDefault();
var form = $('#st_score_form');
var formdata = form.serialize();
// check for value if not empty
var subject_id = $('#subject_id').val();
var class_id = $('#class_id').val();
var term = $('#term').val();
if (subject_id != '' || class_id != '') {
$.post("includes/ajax/create_score.php", formdata)
.done(function(data){
$("#success").fadeIn('slow', function(){
$("#success").html('<div class="alert alert-info alert-dismissible"><button type="button" class="close" data-dismiss="alert" aria-hidden="true"><i class="glyphicon glyphicon-remove-circle"></i></button><b><i class="fa fa-check"></i>Alert! </b>'+data+'</div>');
});
})
.fail(function(data){
$("#success").fadeIn('slow', function(){
$("#success").html('<div class="alert alert-warning alert-dismissible"><button type="button" class="close" data-dismiss="alert" aria-hidden="true"><i class="glyphicon glyphicon-remove-circle"></i></button><b><i class="fa fa-warning"></i>Alert! </b>'+data+'</div>');
});
});
}
});
您的问题编号
2)当您从read_student_score_form.php
页面获得结果时,尝试在浏览器控制台中运行此操作以查看您是否有任何结果,,那是在您尝试将其发送到服务器之前,
var form = $('#st_score_form');
var formdata = form.serialize();
运行它,并在这里得到你的结果,所以也许我们可以继续这个问题,
更新:
你错误地循环...看看你在php中的时间,那会渲染多个<form action="#" method="post" id="st_score_form">
而这是错误的..之前移动它,而这样的事情:
<?php
$output .= '<form action="#" method="post" id="st_score_form">';
while ($row = mysqli_fetch_array($result)) {
} // end while
$output .= '</form>';