我整好了一个,单独访问可以获得文件大小,但是如果部署到web工程下访问此界面就获取不了文件大小。
我的代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here </title>
<script type="text/javascript">
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
var sizeLabel = ["B", "KB", "MB", "GB"];
function fileChange(target) {
var fileSize = 0;
if (isIE && !target.files) {
var filePath = target.value;
var fileSystem = new ActiveXObject("Scripting.FileSystemObject");
var file = fileSystem.GetFile (filePath);
fileSize = file.Size;
} else {
fileSize = target.files[0].size;
}
displayFileSize(fileSize);
}
function displayFileSize(size) {
var fileSize = document.getElementById("fileSize");
alert("文件大小为:"+calFileSize(size));
fileSize.innerHTML = calFileSize(size);
}
function calFileSize(size) {
for (var index = 0; index < sizeLabel.length; index++) {
if (size < 1024) {
return round(size, 2) + sizeLabel[index];
}
size = size / 1024;
}
return round(size, 2) + sizeLabel[index];
}
function round(number, count) {
return Math.round(number * Math.pow(10, count)) / Math.pow(10, count);
} </script>
</head>
<body>
<div>
<input type="file" onchange="fileChange(this);">
</div>
<div id="fileSize"></div>
</body>
</html>
我的代码如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here </title>
<script type="text/javascript">
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
var sizeLabel = ["B", "KB", "MB", "GB"];
function fileChange(target) {
var fileSize = 0;
if (isIE && !target.files) {
var filePath = target.value;
var fileSystem = new ActiveXObject("Scripting.FileSystemObject");
var file = fileSystem.GetFile (filePath);
fileSize = file.Size;
} else {
fileSize = target.files[0].size;
}
displayFileSize(fileSize);
}
function displayFileSize(size) {
var fileSize = document.getElementById("fileSize");
alert("文件大小为:"+calFileSize(size));
fileSize.innerHTML = calFileSize(size);
}
function calFileSize(size) {
for (var index = 0; index < sizeLabel.length; index++) {
if (size < 1024) {
return round(size, 2) + sizeLabel[index];
}
size = size / 1024;
}
return round(size, 2) + sizeLabel[index];
}
function round(number, count) {
return Math.round(number * Math.pow(10, count)) / Math.pow(10, count);
} </script>
</head>
<body>
<div>
<input type="file" onchange="fileChange(this);">
</div>
<div id="fileSize"></div>
</body>
</html>
这个问题以前项目中也遇到过,在ie6下的解决方案可参考http://www.cnblogs.com/poissonnotes/archive/2010/03/04/1678288.html,
不过当时项目中用到的是ie8,上面的方式会弹出允许组件,太不友好,最后没有办法只是在页面控件上方给出了友情提示:上传附件:xxxx不能超过xxM