[英]Upload from desktop with HTML5 and Javascript (drag and drop)
I'm making a typical drag and drop for upload images from desktop to browser, i can drop content inside the box and with a console.log view the content in the browser console: 我正在进行典型的拖放操作,以将图像从桌面上传到浏览器,我可以将内容拖放到框内,并使用console.log在浏览器控制台中查看内容:
File { name: "deam230mthumb.jpg", lastModified: 1194641808000, lastModifiedDate: Date 2007-11-09T20:56:48.000Z, size: 60313, type: "image/jpeg" }
I want to view the image inside a box and then upload on submit. 我想在一个框内查看图像,然后在提交时上传。
Here my code is use Jade template engine: 这里我的代码是使用Jade模板引擎:
Jade (HTML) 玉(HTML)
form(action="" enctype="multipart/form-data")
div(class="all-100 miniatures")
div(class="all-100 drop ink-droppable align-center fallback" id="dropZone" ondrop="drop(event)" ondragover="allowDrop(event)")
Javascript Java脚本
script.
var dropZone = document.getElementById('dropZone');
function allowDrop(e){
e.preventDefault();
}
function drop(e){
var file = e.dataTransfer.files[0];
e.preventDefault();
console.log(file);
//e.target.appendChild(file);
}
Ok, my Javascript looks this now: 好的,我的Javascript现在看起来像这样:
At this point we can drag images from our desktop to browser and view them, now, we need to upload that files.
此时,我们可以将图像从桌面拖动到浏览器并查看它们,现在,我们需要上传该文件。
script.
var dropZone = document.getElementById('dropZone');
function allowDrop(e){
e.preventDefault();
}
function drop(e){
var file = e.dataTransfer.files[0];
e.preventDefault();
console.log(file);
var reader = new FileReader();
reader.onload = function(event){
var miniatures = document.getElementById('miniatures');
var miniature = new Image();
miniature.src = event.target.result;
miniature.width = 100;
miniatures.appendChild(miniature);
}
reader.readAsDataURL(file);
}
I added an array for content each file from the event, on the following code we need to add a controller for handle each file from the array with a register of each one on the database.
我为事件中每个文件的内容添加了一个数组,在下面的代码上,我们需要添加一个控制器来处理数组中的每个文件,并在数据库中添加每个寄存器。
script.
var dropZone = document.getElementById('dropZone');
function allowDrop(e){
e.preventDefault();
}
var files = [];
function drop(e){
var file = e.dataTransfer.files[0];
files.push(file);
console.log(file)
e.preventDefault();
var reader = new FileReader();
reader.onload = function(event){
var miniatures = document.getElementById("miniatures");
var img = new Image();
img.src = event.target.result;
var miniature = document.createElement("div");
miniature.className = "all-20";
miniature.appendChild(img);
miniatures.appendChild(miniature);
}
var readerContent = reader.readAsDataURL(file);
var input = document.getElementById("upload");
input.files = readerContent;
console.log(files);
}
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