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asp和c#隐藏文件下载路径的方法
关于下载路径的隐藏都是通过传递一个数据库中的id，然后在另外一张页面通过传递的id在数据库中读出路径。
1、c#中实现的方法（只需要.aspx.cs的代码就可以了）
string sel_sql="select filevisualpath from tabmailattachfiles where fileid="+request.querystring["destfilename"].tostring();
// string destfilename = request.querystring["destfilename"]!=null?request.querystring["destfilename"]:"";
string destfilename=roa.components.fune_commerce.execad(sel_sql).tables[0].rows[0][0].tostring();
destfilename = server.mappath(".")+destfilename;
destfilename = server.urldecode(destfilename);
if(file.exists(destfilename))
{
fileinfo fi = new fileinfo(destfilename);
response.clear();
response.clearheaders();
response.buffer = false;
//response.appendheader("content-disposition","attachment;filename=" +httputility.urlencode(path.getfilename(destfilename),system.text.encoding.default));
response.appendheader("content-disposition","attachment;filename=" +httputility.urlencode(path.getfilename(destfilename),system.text.encoding.utf8));
response.appendheader("content-length",fi.length.tostring());
response.contenttype="application/octet-stream";
response.writefile(destfilename);
response.flush();
response.end();
}
else
{
response.write("<script langauge=javascript>alert('文件不存在!');history.go(-1);</script>");
response.end();
}
2、在asp中的实现方法
<!--#include file="conn.asp" -->
<%
response.buffer = true
response.clear
dim url
dim fso,fl,flsize
dim dname
dim objstream,contenttype,flname,isre,url1
'*********************************************调用时传入的下载文件名
m_id=trim(request.querystring("id"))
set rs=server.createobject("adodb.recordset")
