ASP和C#隐藏文件下载路径的方法

核心提示：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，ASP和C#隐藏文件下载路径的方法，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 TabMailAttach

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")
sql="select * from dataview where xsf=true and id="&m_ID
rs.open sql,conn,1,1
if not rs.eof then
　  Dname=rs("path")
else
　  Response.Write("no found")
　  Response.end
end if
rs.close:set rs=nothing
'******************************************************************
If Dname<>"" Then
'******************************下载文件存放的服务端目录
url=Server.MapPath(Dname)
else
　  Response.Write("no found")
　  Response.end 
End If
Set fso=Server.CreateObject("Scripting.FileSystemObject")
Set fl=fso.getfile(url)
flsize=fl.size
flName=fl.name
Set fl=Nothing
Set fso=Nothing
Set objStream = Server.CreateObject("ADODB.Stream")
objStream.Open
objStream.Type = 1
objStream.LoadFromFile url
Select Case lcase(Right(flName, 4))
Case ".asf"
ContentType = "video/x-ms-asf"
Case ".avi"
ContentType = "video/avi"
Case ".doc"
ContentType = "application/msWord"
Case ".zip"
ContentType = "application/zip"
Case ".xls"
ContentType = "application/vnd.ms-Excel"
Case ".gif"
ContentType = "image/gif"
Case ".jpg", "jpeg"
ContentType = "image/jpeg"
Case ".bmp"
ContentType = "image/bmp"
Case ".ppt"
ContentType = "application/vnd.ms-Powerpoint"
Case ".mdb"
ContentType = "application/x-msaccess"
Case ".wav"
ContentType = "audio/wav"
Case ".mp3"
ContentType = "audio/mpeg3"
Case ".mpg", "mpeg"
ContentType = "video/mpeg"
Case ".rtf"
ContentType = "application/rtf"
Case ".htm", "html"
ContentType = "text/html"
Case ".txt"
ContentType = "text/plain"
Case Else
ContentType = "application/octet-stream"
End Select
Response.AddHeader "Content-Disposition", "attachment; filename=" & flName
Response.AddHeader "Content-Length", flsize
Response.Charset = "UTF-8"
Response.ContentType = ContentType
Response.BinaryWrite objStream.Read
Response.Flush
response.Clear()
objStream.Close
Set objStream = Nothing
%>

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