System.IO.FileInfo info = new System.IO.FileInfo(Server.Mappath("Data\") + "FileName.exe");
protected void Button3_Click(object sender, EventArgs e)
{ Response.Clear(); Response.ClearHeaders(); Response.Buffer = true;// 指定返回的是一个不能被客户端读取的流，必须被下载
Response.ContentType = "application/octet-stream";// 添加头信息，为"文件下载/另存为"对话框指定默认文件名
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(info.Name, System.Text.Encoding.UTF8));// 添加头信息，指定文件大小，让浏览器能够显示下载进度
Response.AddHeader("Content-Length", info.Length.ToString()); //Response.AddHeader("Content-Transfer-Encoding", "binary");// 指定返回的是一个不能被客户端读取的流，必须被下载
//Response.AddHeader("content-type", "application/x-msdownload");// 指定返回的是一个不能被客户端读取的流，必须被下载
// Response.ContentType = "application/ms-excel";// 把文件流发送到客户端
Response.WriteFile(info.FullName); Response.Flush(); Response.End(); }文件下载，指定默认名
Response.AddHeader("content-type","application/x-msdownload");Response.AddHeader("Content-Disposition","attachment;filename=要下载的文件名.rar");刷新页面
Response.AddHeader “REFRESH”, ”60;URL=newpath/newpage.asp” 这等同于客户机端<META>元素： <META HTTP-EQUIV=”REFRESH”, “60;URL=newpath/newpage.asp”页面转向
Response.Status = “302 Object Moved” Response.Addheader “Location”, “newpath/newpage.asp” 这等同于使用Response.Redirect方法： Response.Redirect “newpath/newpage.asp”强制浏览器显示一个用户名/口令对话框
Response.Status= “401 Unauthorized” Response.Addheader “WWW-Authenticate”, “BASIC” 强制浏览器显示一个用户名/口令对话框，然后使用BASIC验证把它们发送回服务器（将在本书后续部分看到验证方法）。如何让网页不缓冲
Response.Expires = 0 Response.ExpiresAbsolute = Now() - 1 Response.Addheader "pragma","no-cache" Response.Addheader "cache-control","private" Response.CacheControl = "no-cache"