原理参见
http://www.cnblogs.com/xbf321/archive/2007/11/09/954317.html
<%@ Page Language="C#" %>
<!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>File Upload</title>
<script type="text/javascript" src="js/jquery-1.2.6.js"></script>
<script type="text/javascript">
$(document).ready(function(){
if(window.top == window)
{
var $div = $(document.createElement("div"));
$div.html("<iframe src='"+document.URL+"' name='uploadiframe' id='uploadiframe'></iframe>");
$div.css({display:"none"})
$("body").append($div);
$("form").attr("target","uploadiframe");
$("form").submit();
$(".myupload").empty();
var $a = $(document.createElement("a"));
$($a).html("upload");
$($a).click(function(){
$("#uploadiframe").contents().find(":file").click();
$("#uploadiframe").contents().find(":submit").click();
return false;
});
$(".myupload").append($a);
}
});
</script>
<script type="text/C#" runat="server">
protected void File_Upload(object sender, EventArgs e)
{
if (FileUploadControl.HasFile == true)
{
FileUploadControl.SaveAs(@"D:\upload\" + FileUploadControl.FileName);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div class="myupload">
<asp:FileUpload ID="FileUploadControl" runat="server" />
<asp:Button runat="server" OnClick="File_Upload" Text="Upload It" />
</div>
</form>
</body>
</html>
<!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>File Upload</title>
<script type="text/javascript" src="js/jquery-1.2.6.js"></script>
<script type="text/javascript">
$(document).ready(function(){
if(window.top == window)
{
var $div = $(document.createElement("div"));
$div.html("<iframe src='"+document.URL+"' name='uploadiframe' id='uploadiframe'></iframe>");
$div.css({display:"none"})
$("body").append($div);
$("form").attr("target","uploadiframe");
$("form").submit();
$(".myupload").empty();
var $a = $(document.createElement("a"));
$($a).html("upload");
$($a).click(function(){
$("#uploadiframe").contents().find(":file").click();
$("#uploadiframe").contents().find(":submit").click();
return false;
});
$(".myupload").append($a);
}
});
</script>
<script type="text/C#" runat="server">
protected void File_Upload(object sender, EventArgs e)
{
if (FileUploadControl.HasFile == true)
{
FileUploadControl.SaveAs(@"D:\upload\" + FileUploadControl.FileName);
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div class="myupload">
<asp:FileUpload ID="FileUploadControl" runat="server" />
<asp:Button runat="server" OnClick="File_Upload" Text="Upload It" />
</div>
</form>
</body>
</html>