html5 的文件 api 示例与 jquery? [英] html5's file api example with jquery?

问题描述

我想使用 html5 的文件 api，结合外部拖放功能(将外部文件拖到指定位置并捕获其内容)和 jquery.我找到了一个非 jquery 示例:(html5 demo: file api)

I would like to use html5's file api, in combination with the external drag n drop functionality (drag an external file onto a designated spot and capture its contents) and jquery. I found a working non-jquery example: (html5 demo: file api)

 var drop = document.getElementById('drop');  
 drop.ondragover = function () {this.className = 'focus'; return false;};  
 drop.ondragend = function () { this.className = ''; return false; };  
 drop.ondrop=function(e) {  
          this.className = '';  
          e.preventDefault();  
          var file = e.dataTransfer.files[0];  
          var reader = new FileReader();  
          reader.onload = function (evt) {  
                console.log(evt.target.result);  
          }  
          reader.readAsText(file);  
      }; 

这很好用.现在我想让它更像 jquery-ish，我试过:

This works fine. Now I would like to make this more a jquery-ish and I tried:

 $("#drop").bind('ondragover',function() {this.addClass('focus'); return false;})
.bind("ondragend",function () { this.removeClass('focus'); return false;})  
.bind("ondrop",function(e) {  
         this.removeClass("focus");  
         e.preventDefault();  
         var file = e.dataTransfer.files[0];  
         var reader = new FileReader();  
         reader.onload = function (evt) {  
               console.log(evt.target.result);  
         }  
         reader.readAsText(file);  
     });   

但这不起作用，似乎没有任何绑定事件被触发.我还尝试松开事件名称的on"部分，但这也不起作用.希望这里有人能发光?

But that doesn't work, none of the binded events seems to get triggered. I also tried to loose the "on" part for the eventnames but that also doesn't work. Hopefully somebody here can shine a light?

问候，杰伦.

推荐答案

解决方案很简单.

1. 去掉 on 前缀(这就是没有抛出事件的原因)
2. this. => $(this).(这就是为什么在抛出事件时什么也没有发生，它给出了错误).

1. Lose the on prefix (that's why no events were thrown)
2. this. => $(this). (that's why when events were thrown nothing happened, it gave an error).

对我来说它奏效了.

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