用JavaScript填写输入文件表单 [英] Fill input file form with JavaScript

问题描述

我需要用JavaScript填充HTML表单来设置文件的上传路径。这个表单所属的网页已经有了一个可视化上传的实现，但是

 < form id =mobile_fileform> 
< input type =filestyle =height：20px; width：0px; opacity：0;id =mobile_fileselect1multiple =size = -  17> 
< input type =filestyle =height：20px; width：0px; opacity：0;id =mobile_fileselect2multiple =size = -  17> 
< input type =filestyle =height：20px; width：0px; opacity：0;id =mobile_fileselect3multiple =size = -  17> 
< / form> 
  

如何在此窗体中设置文件的路径，以及如何使用JavaScript上载文件？

感谢您的帮助 属性 input：file 为只读。如果你想设置它，你需要做服务器端。

因此，你要做的是不可能即可。考虑一下它的含义：只要知道路径，任何网页都可以上传任何文件。

I need to fill an HTML form with JavaScript to set the path of a file for upload it. The web that this form belongs to, already has a visual upload implemented, but

<form id="mobile_fileform">
    <input type="file" style="height: 20px; width: 0px; opacity: 0; " id="mobile_fileselect1" multiple="" size="-17">
    <input type="file" style="height: 20px; width: 0px; opacity: 0; " id="mobile_fileselect2" multiple="" size="-17">
    <input type="file" style="height: 20px; width: 0px; opacity: 0; " id="mobile_fileselect3" multiple="" size="-17">
</form>

How can I set the path of the file in this form and how can I upload it using JavaScript?

Thanks for your help

解决方案

The value property of input:file is read-only for security reasons. If you want to set it, you'll need to do it server-side.

As a result, what you're asking to do is not possible. Consider the implications: any webpage would be able to upload any file from someone's computer, so long as they knew the path.

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