我无法将数据发送到数据库。这些值正在发送,但它们都进入第一个放置区域字段。我需要每个dropzone值进入数据库中的正确字段。
我试过投入不同的听众和如果javascript中的语句,但它不适合我。
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>
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]')";
请问好吗?
答案 0 :(得分:3)
var u = $('drop_zone1');
if(u){
$.post("post.php", y);
};
(我假设这是jQuery。)
将#
添加到选择器的开头:$('#drop_zone1');
。
jQuery结果集始终计算为真值。我不清楚你在这里要验证的条件是什么......
在PHP代码中,您在第一个$sql2
中的if
中创建了查询,而在另外两个$sql
中创建了查询。
编辑 - 既然我们知道你在setTimeout中想要做什么,这个简化的函数应该可以工作:
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();
/*
this part has been removed, see edit below
var dropDetails = oldThis.id + '=' + iObj;
// now dropDetails should look something like "drop_zone1=img1"
$.post("post.php", dropDetails);
*/
oldThis.style.borderColor = "#ccc";
}, 500);
再一次编辑,一次提交所有删除的元素:
function postdb() {
var postDetails = {};
var dropZones = document.querySelectorAll('[droppable=true]');
var allZonesDropped = true;
for(var ix = 0; ix < dropZones.length; ++ix) {
var zone = dropZones[ix];
var dropped = zone.querySelector('[draggable=true]');
if(dropped) {
var dropTag = dropped.id;
postDetails[zone.id] = dropTag;
} else {
allZonesDropped = false;
}
}
if(allZonesDropped) {
$.post("a-2.php", dropDetails);
} else {
alert('Not all targets have elements in them');
}
return false;
});
请注意放置此功能的位置 - 您编辑过的问题会在setTimeout
调用的中间出现,而且肯定无法正常工作。
关于您的PHP代码:您应真正了解PDO或MySQLi并使用预准备语句,而不是盲目地将用户输入插入查询中。如果您想学习,here is a quite good PDO-related tutorial。