Javascript to check filesize before upload in Internet Explorer

后端未结

关注

 4  1198

Is it possible to use Javascript to check for a file\'s size (at the client side) before it is actually uploaded to the server?

The application is built on EXTJS and

相关标签:

4条回答

盖世英雄少女心

2020-12-17 17:31

It is possible with ActiveX Objects.

<html>
<head>
<script>
function getSize()
{
    var myFSO = new ActiveXObject("Scripting.FileSystemObject");
    var filepath = document.upload.file.value;
    var thefile = myFSO.getFile(filepath);
    var size = thefile.size;
    alert(size + " bytes");
}
</script>
</head>
<body>
<form name="upload">
<input type="file" name="file">
<input type="button" value="Size?" onClick="getSize();">
</form>
</body>
</html>

0 讨论(0)

粉色の甜心

2020-12-17 17:36

There's currently no way to portably check the size of an uploaded file from the web browser. The HTML5 File API makes this possible, but that's not available in MSIE7 -- it's currently on track for MSIE10.

There is intentionally no way to determine the full path of an uploaded file, as that may include sensitive information, like the name of the end user.

0 讨论(0)
发布评论:

提交评论
- 加载中...

灰色年华

2020-12-17 17:49

Please try below code,

<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.7.1.js"></script>
<script type="text/javascript">
$(function() {
$("document").ready(function(){
        $("#myFile1").change(function() {

        var f1=document.getElementById("myFile1").value;
        if((f.size||f.fileSize)==09765625)
        {
        alert("file size is less than 1mb");
        }
        else
        {
        alert("file size should not exceed more than 1mb");
                $(this).val($.data(this, 'f'));
        return false;
        }

            });
});
})
</script>
</head>
<body>

<input type='file' name="file" id="myFile1" />

</body>
</html>

0 讨论(0)

一个人的身影

2020-12-17 17:51

The reason you can't is because it would be bad if browsers, and javascript, could access the clients filesystem.

This is actively denied and can be seen as an attack.

Using jQuery, Restricting File Size Before Uploading

0 讨论(0)
发布评论:

提交评论
- 加载中...