<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs"
Inherits="Default2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head
runat="server">
<title></title>
<script
type="text/javascript">
//本地图片预览
function
setimagepreview(fieldupload, image, imagediv)
{
var
docobj =
document.getElementById(fieldupload);
var imgobjpriview =
document.getElementById(image);
if (docobj.files && docobj.files[0])
{
//
火狐下直接设img属性
imgobjpriview.style.display =
‘block‘;
imgobjpriview.style.width =
‘150px‘;
imgobjpriview.style.height =
‘150px‘;
//火狐7以上版本不能用上面的getAsDataURL()方式获取，需要一下方式
imgObjPreview.src =
window.URL.createObjectURL(docobj.files[0]);
}
else
{
//IE下，使用滤镜
docobj.select();
var imgSrc =
document.selection.createRange().text;
var localImagId =
document.getElementById(imagediv);
//必须设置初始大小
localImagId.style.width =
"150px";
localImagId.style.height =
"150px";
//图片异常的捕捉，防止用户修改后缀来伪造图片
try
{
localImagId.style.filter =
"progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)";
localImagId.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src =
imgSrc;
} catch (e)
{
alert("您上传的图片格式不正确，请重新选择!");
return
false;
}
imgobjpriview.style.display =
‘none‘;
document.selection.empty();
}
return
true;
}
</script>
</head>
<body>
<form
id="form1" runat="server">
<div>
<div
id="localimage">
<img id="preview" width="150px"
height="150px" src="" />
<input type="file"
onchange="javascript:setimagepreview(‘upload‘,‘preview‘,‘localimage‘);"id="upload"
/>
</div>
</div>
</form>
</body>
</html>
