AJAX表单刷新页面

Question

Have been searching around for a while and can't find a proper answer to this problem. I have a "finance" tracker that has several hidden divs which using jQuery appear when the button to show that div is clicked. I have a Asset Tracker which queries a database and upon being checked updates the database with new values in adjacent input rows where the checkbox is located. I am trying to get the checkbox to submit the data without causing the page to reload and the div to "toggle" off again.

On the form section I attempted to remove the method='post' but instead when checking the box it reloaded the page and added all the post variables to the URL string. I removed the action='FBook.php' in an attempt to prevent the reloading, but that did not resolve the problem.

Here is the related code from the PHP file:

if(isset($_POST['AssetSetUpdate'])) { $AssetLastUpdate = $dtNowDate->format('Y-m-d');
foreach($_POST['AssetID'] as $key => $id) { if(isset($_POST['AssetSetUpdate'][$key])) {
$stmt_ATrackUp -> bindParam(':UpDate', $AssetLastUpdate, PDO::PARAM_STR, 10);
$stmt_ATrackUp -> bindParam(':UpNotes', $_POST['AssetNotes'][$key], PDO::PARAM_STR, 50);
$stmt_ATrackUp -> bindParam(':UpThis', $_POST['AssetDescription'][$key], PDO::PARAM_STR, 50);
$stmt_ATrackUp -> bindParam(':UpVal', $_POST['AssetValue'][$key], PDO::PARAM_INT, 3);
$stmt_ATrackUp -> execute(); } else continue; }
echo "<div class='Notice'>" . $PageTitle . " / Assets updated!</div>"; }

(other code)

$(document).ready(function() {

$("#AssetUpdateForm").submit(function(e) {
e.preventDefault();
$.ajax({
    type: 'POST',
     url: 'FBook.php',
    data: $(this).serialize(),
     success: function() { alert('form submitted'); },
    });
return false;
});


$('#ShFBAsset').click(function() { $('#FBAsset').toggle('slow'); });

(other code)

});

(other code)

$AssetCounter = 1;

$stmt_ATrack -> execute(); while ($row_ATrack = $stmt_ATrack -> fetch(PDO::FETCH_ASSOC))

{   

$ChAge = $row_ATrack['Checked']; $cChAge = ''; switch(true)
{
case (strtotime($ChAge) >= strtotime('-7 days')): $cChAge = 'FBCAN'; break;
case (strtotime($ChAge) >= strtotime('-30 days')): $cChAge = 'FBCA1'; break;
case (strtotime($ChAge) >= strtotime('-90 days')): $cChAge = 'FBCA3'; break;
default: $cChAge = 'FBCA6'; break;
}

if(isset($row_ATrack['Serial'])) { $IfDSerial = "<strong>Serial: </strong>" . $row_ATrack['Serial'] . "<br/>"; } else { $IfDSerial = ''; }
if(isset($row_ATrack['UPC'])) { $IfDUPC = "<strong>UPC: </strong>" . $row_ATrack['UPC'] . "<br/>"; } else { $IfDUPC = ''; }
if(isset($row_ATrack['Related'])) { $IfDRelated = "<strong>Related: </strong>" . $row_ATrack['Related'] . "<br/>"; } else { $IfDRelated = ''; }
if(isset($row_ATrack['Location'])) { $IfDLocation = "<strong>Location: </strong>" . $row_ATrack['Location'] . "<br/>"; } else { $IfDLocation = ''; }
if(isset($row_ATrack['TagPhoto'])) { $IfDTagPhoto = "<strong>Tag photo: </strong><a href='Images/INV/" . $row_ATrack['TagPhoto'] . ".JPG'>" . $row_ATrack['TagPhoto'] . "</a><br/>"; } else { $IfDTagPhoto = ''; }

$IfDetails = "<div class='UPop'><img class='th_icon' src='Images/Icons/ic_lst.jpeg'><div class='UPopO'>" . ($IfDSerial) . ($IfDUPC) . ($IfDRelated) . ($IfDLocation) . ($IfDTagPhoto) . "</div></div>";
if($IfDetails == "<div class='UPop'><img class='th_icon' src='Images/Icons/ic_lst.jpeg'><div class='UPopO'></div></div>") { $IfDetails = ''; }

echo "<form id='AssetUpdateForm[" . $AssetCounter . "]' method='post'>";
echo "<tr><input type='hidden' name='AssetID[" . $AssetCounter . "]' value='" . $AssetCounter . "' />";
echo "<td><input type='hidden' name='AssetDescription[" . $AssetCounter . "]' value='" . $row_ATrack['Description'] . "' /><a href='https://www.google.com/#q=eBay+" . $row_ATrack['Description'] . "' target='_new_AssetSearch'>" . $row_ATrack['Description'] . "</a></td>";
echo "<td>" . $row_ATrack['Type'] . " - " . $row_ATrack['Category'] . "</td>";
echo "<td><input type='checkbox' name='AssetSetUpdate[" . $AssetCounter . "]' value='Now' onchange='this.form.submit();' /></td>";
echo "<td><input type='number' name='AssetValue[" . $AssetCounter . "]' value = '" . $row_ATrack['Value'] . "' style='width: 75px;' /></td>";
echo "<td class='" . $cChAge . "'>" . $ChAge . "</td>";
echo "<td><input type='text' name='AssetNotes[" . $AssetCounter . "]' value = '" . $row_ATrack['Notes'] . "' style='width: 140px;' /></td>";
echo "<td>" . $IfDetails . "</td>";
echo "</tr>";
echo "</form>";

$AssetCounter++;

}

Answer 1

Your JavaScript:

$("#AssetUpdateForm")

… is working on a form with id="AssetUpdateForm" .

Your PHP says:

id='AssetUpdateForm[" . $AssetCounter . "]'

which in HTML terms becomes:

id='AssetUpdateForm[something]'

Even if the variable is empty, you still have the square brackets, so the ID is not going to match and the JavaScript event handler will never be bound to that element.

You need to either use the real ID or, since it appears that it can change, add a class to the form and use a .class-selector in the JavaScript.

---

NB: Your HTML is invalid. The particular problem you have has the potential to cause the same symptoms are you describe so just fixing the problem above might not be enough. Use a validator and write valid HTML too.

Answer 2

Had nothing to do with the HTML or PHP. Turns out that jQuery AJAX was conflicting with the onclick='this.form.submit();' property. I removed that and changed the ajax request to the following - and while it still has bugs as it won't work on the 2nd ajax request, it validates everything else is fine.

$(".Check2Update").on('change', function(e) {
e.preventDefault();
$.ajax({
    type: 'post',
    url: 'FBook.php',
    data: $(this.form).serialize(),
    success: function(html) { 
        console.log('Successfully submitted AJAX!');
        $("#TableAssets").replaceWith($('#TableAssets', $(html)));
    }
    });

});