C#文件下载

       #region
        public static void ToDownload()
        {
            string downloadPath = "f:/temp/eclipse-SDK-3.6.1-win32.zip";
            string savename = "eclipse-3.6.1.zip";
            ToDownloadOrOpen(downloadPath, savename, "attachment");
            //ToDownloadOrOpen(downloadPath, savename, "inline");
        }

        public static void ToDownloadOrOpen(string serverfilpath, string filename, string handle)
        {
            FileStream fileStream = new FileStream(serverfilpath, FileMode.Open);
            long fileSize = fileStream.Length;
            HttpContext.Current.Response.ContentType = "application/octet-stream";
            HttpContext.Current.Response.AddHeader("Content-Disposition", handle +"; filename=\"" + UTF_FileName(filename) + "\";");
            ////attachment --- 作为附件下载
            ////inline --- 在线打开
            HttpContext.Current.Response.AddHeader("Content-Length", fileSize.ToString());
            byte[] fileBuffer = new byte[fileSize];
            fileStream.Read(fileBuffer, 0, (int)fileSize);
            HttpContext.Current.Response.BinaryWrite(fileBuffer);
            fileStream.Close();
            HttpContext.Current.Response.End();
        }

        private static string UTF_FileName(string filename)
        {
            return HttpUtility.UrlEncode(filename, System.Text.Encoding.UTF8);
        }
        #endregion