用HTML / JavaScript检测本地文件拖动 [英] Detecting local file drag'n'drop with HTML/JavaScript
问题描述
有一个HTML文本区域。当本地文件被拖放到文本区域时,我可以捕获该事件。但是如何获取删除文件的名称?(要修改并最终插入到textarea中。)
There is a HTML textarea. I'm able to catch that event when a local file is dragged and dropped onto the textarea. But how to obtain the name of the dropped file? (To be modified and inserted into the textarea finally.)
以下表达式返回无在这种情况下:
The following expressions returns None in that case:
event.dataTransfer.files
event.dataTransfer.getData('text/plain')
我作为我目标平台的 Firefox 3 的一个简短例子。
I made a short example for Firefox 3 that is my target platform currently.
<script>
function init() {
document.getElementById('x').addEventListener('drop', onDrop, true)
}
function onDrop(event) {
var data = event.dataTransfer.getData('text/plain')
event.preventDefault()
alert('files: ' + event.dataTransfer.files + ' && data: ' + data + '.')
}
</script>
<body onload='init()'>
<textarea cols=70 rows=20 id='x'></textarea>
推荐答案
这有点晚 - 但我想你正在寻找的是:
This is a bit late - but I think what you are looking for is this:
event.dataTransfer.files[0].name
您还可以获得以下属性:
You can also get the following properties:
event.dataTransfer.files[0].size
event.dataTransfer.files[0].type
你可以通过以下这些文件循环:
And you can loop thru these files with the following:
var listOfNames='';
for(var i=0,tot=event.dataTransfer.files.length; i<tot; i++){
listOfNames+=event.dataTransfer.files[i].name + '\r\n';
}
Btw - 如果您使用的是jQuery,那么可以在这里找到dataTransfer对象:
Btw - if you are using jQuery then the dataTransfer object can be found here:
event.originalEvent.dataTransfer.files[0].name
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