使用jquery.uploadify 传递自己需要的参数 .

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="UploadFile.aspx.cs" Inherits="UploadFile" %>

<!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 ).uploadify({

'uploader': 'JS/jquery.uploadify-v2.1.0/uploadify.swf',

'script': 'JS/jquery.uploadify-v2.1.0/UploadHandler.ashx',

'cancelImg': 'JS/jquery.uploadify-v2.1.0/cancel.png',

'folder': 'UploadFile',

'queueID': 'fileQueue',

'auto': false,

'multi': false

});

});

</script>

</head>

<body>

<form >

取消上传</a>

</p>

<div>

</div>

</form>

</body>

</html>

在UploadHandler.ashx中,context.Request.Params["type"]即可