可以在html5中验证input = file的大小和类型 [英] It is possible to validate the size and type of input=file in html5
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问题描述
我正在阅读这个 http://dev.w3.org/html5/ markup / input.file.html ,但我只找到了接受属性。
我试过这个
< input type =filename =imagefilenameaccept =image / x-png,image / gif,image / jpeg/>
是否可以在客户端验证文件大小?
我发现这个技巧适用于IE
< 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>
<表格名称=上传>
< input type =filename =file>
< input type =buttonvalue =Size?的onClick = 的getSize(); >
< / form>
< / body>
< / html>
是否可以使用 html5文件系统api ?
更新
<!doctype HTML>
< head>
< script src =http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js>< / script>
< / head>
< body>
< form>
< input type = file id = f max-size = 32154>
< input type = submit>
< / form>
< script>
$(function(){
$('form')。submit(function(){
var isOk = true;
$('input [type = file] [ ()($ this(this.files [0]!=='undefined'){
var maxSize = parseInt($(this).attr() 'max-size'),10),
size = this.files [0] .fileSize;
isOk = maxSize> size;
return isOk;
}
});
return isOk;
});
});
< / script>
< / body>
它工作正常,但我认为这将是更好的本地html5 attr来验证 p>
解决方案
我可以这样做(演示):
<!doctype html>
< head>
< script src =http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js>< / script>
< / head>
< body>
< form>
< input type = file id = f max-size = 32154>
< input type = submit>
< / form>
< script>
$(function(){
$('form')。submit(function(){
var isOk = true;
$('input [type = file] [ ()($ this(this.files [0]!=='undefined'){
var maxSize = parseInt($(this).attr() 'max-size'),10),
size = this.files [0] .fileSize;
isOk = maxSize> size;
return isOk;
}
});
return isOk;
});
});
< / script>
< / body>
I was reading this http://dev.w3.org/html5/markup/input.file.html, but I only found the "accept" attribute.
I tried this
<input type="file" name="imagefilename" accept="image/x-png, image/gif, image/jpeg" />
Is it possible client-side validation of file size?
I found this technique for IE
<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>
Is it possible to do the same using html5 filesystem api ?
UPDATE
I could do this (demo):
<!doctype html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
</head>
<body>
<form >
<input type=file id=f max-size=32154 >
<input type=submit>
</form>
<script>
$(function(){
$('form').submit(function(){
var isOk = true;
$('input[type=file][max-size]').each(function(){
if(typeof this.files[0] !== 'undefined'){
var maxSize = parseInt($(this).attr('max-size'),10),
size = this.files[0].fileSize;
isOk = maxSize > size;
return isOk;
}
});
return isOk;
});
});
</script>
</body>
It is working fine, but I think It will be better to a native html5 attr to validate
解决方案
I could do this (demo):
<!doctype html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
</head>
<body>
<form >
<input type=file id=f max-size=32154 >
<input type=submit>
</form>
<script>
$(function(){
$('form').submit(function(){
var isOk = true;
$('input[type=file][max-size]').each(function(){
if(typeof this.files[0] !== 'undefined'){
var maxSize = parseInt($(this).attr('max-size'),10),
size = this.files[0].fileSize;
isOk = maxSize > size;
return isOk;
}
});
return isOk;
});
});
</script>
</body>
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