Browse and select files from user hard drive gives

问题:

when I use my input button to browse for the file on the user computer it works on FF, IE9 and Chrome. But when I am passing the files to the JS function in IE9 I get undefined, while it works perfectly in FF and Chrome.

 <form id="uploadForm" style='display:none;padding:1px;' method="post" enctype="multipart/form-data">
 <input type="file" name="data" id="inFile" size="15" style="display:none" onchange="handleFiles(this.files)"/>


function handleFiles(files){
//doing something with the files
}



 //In IE files is undefined

I have also tried to use

    dojo.connect(dojo.byId("uploadForm").data, "onchange", function(evt){
        handleFiles(this.files);
    });

<form id="uploadForm" method="post" enctype="multipart/form-data">
<input type="file" name="data" id="inFile" size="15" style="display:none"/>

This.files comes undefined again

thanks

回答1:

IE9 does not support multiple files upload and it does not have files property. You will have to rely on value property and parse a filename from the path it provides.

My solution:

1. Pass this instead of this.files into handleFiles() function:

   <input type="file" onchange="handleFiles(this)">
   

2. Start your handleFiles() function like this:

   function handleFiles(input){
       var files = input.files;
       if (!files) {
           // workaround for IE9
           files = [];            
           files.push({
               name: input.value.substring(input.value.lastIndexOf("\\")+1),
               size: 0,  // it's not possible to get file size w/o flash or so
               type: input.value.substring(input.value.lastIndexOf(".")+1)
           });
       }
   
       // do whatever you need to with the `files` variable
       console.log(files);
   }
   

See working example at jsFiddle: http://jsfiddle.net/phusick/fkY4k/

回答2:

Well obviously files is not defined in IE. See here for how to do it with IE.