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我無法將數據發送到數據庫。值正在發送,但他們都進入第一個拖放區域。我需要每個dropzone值進入數據庫中的正確字段。Javascript事件 - 將值發送到數據庫
我試着把不同的聽衆& if語句中的JavaScript,但它不會爲我工作。
的HTML:
<ul id="images">
<li><a id="img1" draggable="true"><img src="images/1.jpg"></a></li>
<li><a id="img2" draggable="true"><img src="images/2.jpg"></a></li>
<li><a id="img3" draggable="true"><img src="images/3.jpg"></a></li>
</ul>
//dropzones
<div class="drop_zones">
<div class="drop_zone" id="drop_zone1" droppable="true">
</div>
<div class="drop_zone" id="drop_zone2" droppable="true">
</div>
<div class="drop_zone" id="drop_zone3" droppable="true">
</div>
</div>
<button id = "post" onClick="postdb();">Post info</button>
的JavaScript:
var addEvent = (function() {
if (document.addEventListener) {
return function (el, type, fn) {
if (el && el.nodeName || el === window) {
el.addEventListener(type, fn, false);
} else if (el && el.length) {
for (var i = 0; i < el.length; i++) {
addEvent(el[i], type, fn);
}
}
};
} else {
return function (el, type, fn) {
if (el && el.nodeName || el === window) {
el.attachEvent('on' + type, function() {
return fn.call(el, window.event);
});
} else if (el && el.length) {
for (var i = 0; i < el.length; i++) {
addEvent(el[i], type, fn);
}
}
};
}
})();
var dragItems;
updateDataTransfer();
var dropAreas = document.querySelectorAll('[droppable=true]');
function cancel(e) {
if (e.preventDefault) {
e.preventDefault();
}
return false;
}
function updateDataTransfer() {
dragItems = document.querySelectorAll('[draggable=true]');
for (var i = 0; i < dragItems.length; i++) {
addEvent(dragItems[i], 'dragstart', function (event) {
event.dataTransfer.setData('obj_id', this.id);
return false;
});
}
}
addEvent(dropAreas, 'dragover', function (event) {
if (event.preventDefault)
event.preventDefault();
this.style.borderColor = "#000";
return false;
});
addEvent(dropAreas, 'dragleave', function (event) {
if (event.preventDefault)
event.preventDefault();
this.style.borderColor = "#ccc";
return false;
});
addEvent(dropAreas, 'dragenter', cancel);
// drop event handler
addEvent(dropAreas, 'drop', function (event) {
if (event.preventDefault)
event.preventDefault();
// get dropped object
var iObj = event.dataTransfer.getData('obj_id');
var oldObj = document.getElementById(iObj);
// get its image src
var oldSrc = oldObj.childNodes[0].src;
oldObj.className += 'hidden';
var oldThis = this;
setTimeout(function() {
oldObj.parentNode.removeChild(oldObj); // remove object from DOM
// add similar object in another place
oldThis.innerHTML += '<a id="' + iObj + '" draggable="true"><img src="' + oldSrc + '" /> </a>';
// and update event handlers
updateDataTransfer();
function postdb(){
if (document.querySelectorAll('[droppable=true]')){
var dropDetails = oldThis.id + '=' + iObj;
$.post("a-2.php", dropDetails);
}
oldThis.style.borderColor = "#ccc";
}, 500);
return false;
});
和我的PHP:
$sql="INSERT INTO table_answers (drop_zone1, drop_zone2, drop_zone3) VALUES ('$_POST[drop_zone1]','$_POST[drop_zone2]','$_POST[drop_zone3]')";
任何想法嗎?
@lana:可能我建議[jQuery UI Droppable](http://jqueryui.com/demos/droppable/)而不是實現手動拖/放? – DCoder
@lana:在我看來,你只是在測試圖像被放入哪個區域?表單提交函數中的變量'oldThis'指向dropzone,因此你可以檢查它的'id'屬性來查看這個事件發生在哪個dropzone。 – DCoder
@lana:應該和'oldThis.id'一樣簡單。 ..我編輯帖子,顯示如何在上下文中工作。 – DCoder