本文轉自：http://hi.baidu.com/yuxi981/item/7c617fc41b03ad60f6c95d30
Response.AddHeader實現下載 /// <summary>
///
Response.AddHeader實現下載
/// </summary>
/// <param
name="filePath">完整的文件路徑</param>
/// <param
name="fileName">文件名</param>
private void DownFile(string
filePath, string fileName)
{
FileInfo fileInfo = new
FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" +
fileName);
Response.AddHeader("Content-Length",
fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding =
System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
Response.End();
}下面才是我實際用的下載代碼，好象對中文名的支持還可以，呵呵，我對網絡上的各種編碼不熟悉，可能只是走運吧，希望能幫大家解決一些問題，我的這些都是看了尚俊傑先生的ASP
無組件上傳原理簡明教程 后學會的，大家可以到網上查查看<%
if request("id") ="" then
response.End()
Set conn=Server.CreateObject("ADODB.Connection")
conn.Open
mallDSN
strSql="Select * From files where id = " & Request("id")
Set
rs=conn.Execute(strSql)
if conn.errors.count >0 then
response.write("數據庫錯誤！不能下載！")
end if
Response.Buffer = true
Response.Clear
Select Case lcase(rs("contentType"))
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 ".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.Charset = "UTF-8"
'下面將文件輸出到客戶端，首先指明
ContentType,其實這里用下面兩行哪個都可以
Response.ContentType =
ContentType
'Response.ContentType = rs("contentType")
'告訴瀏覽器文件名稱
Response.AddHeader "Content-Disposition","attachment;filename=" &
rs("filename")
'告訴瀏覽器文件大小
Response.AddHeader "Content-Length",
CStr(rs("size"))
'輸出二進制文件
Response.BinaryWrite rs("fileimage")
Response.Flush
response.Clear()
%>