Use a plug-in to compress and download files.

Use a plug-in to compress and download files.

The method used to directly access the Internet:

/// <Summary> /// function: compress the file (only files in the directory at the lower level of the folder are temporarily compressed, and the folder and its sub-level are ignored) /// </summary> /// <param name = "dirPath"> compressed folder path </param> /// <param name = "zipFilePath"> generated path of the compressed file, if it is null, the first-level directory is the same as the compressed folder by default. The name is: folder name. Zip </param> /// <param name = "err"> error message </param> /// <returns> whether compression is successful </returns> public static bool ZipFile (string dirPath, string zipFilePath, out string err) {// if a File with the same name exists on the server, delete if (File. exists (zipFilePath) {try {Fil E. Delete (zipFilePath) ;}catch {}} err = ""; if (dirPath = string. Empty) {err = "the folder to be compressed cannot be blank! "; Return false;} if (! Directory. Exists (dirPath) {err = "the folder to be compressed does not exist! "; Return false;} // when the compressed file name is empty, use the folder name pai.zip if (zipFilePath = string. empty) {if (dirPath. endsWith ("\") {dirPath = dirPath. substring (0, dirPath. length-1);} zipFilePath = dirPath + ". zip ";} try {string [] filenames = Directory. getFiles (dirPath); using (ZipOutputStream s = new ZipOutputStream (File. create (zipFilePath) {s. setLevel (9); byte [] buffer = new byte [4096]; foreach (string file in filenames) {ZipEntry entry = new ZipEntry (Path. getFileName (file); entry. dateTime = DateTime. now; s. putNextEntry (entry); using (FileStream fs = File. openRead (file) {int sourceBytes; do {sourceBytes = fs. read (buffer, 0, buffer. length); s. write (buffer, 0, sourceBytes);} while (sourceBytes> 0);} s. finish (); s. close () ;}} catch (Exception ex) {err = ex. message; return false;} return true ;}

Package and download code directly

String temp_path = HttpContext. current. request. mapPath (". \ query \ "); String path = temp_path + DateTime. now. toString ("yyyyMMddHHmmss"); string newPath = path + "\"; Directory. createDirectory (path); for (int I = 0; I <ds. tables. count; I ++) {DataToCSV. saveCSV (ds. tables [I], newPath);} String result = String. empty; Boolean flag = DataToCSV. zipFile (newPath, temp_path + "MesData.zip", out result); if (flag) {// Delete the generated folder Directory. delete (path, true); // download FileInfo fileInfo = new FileInfo (temp_path + "MesData.zip"); Response. clear (); Response. clearContent (); Response. clearHeaders (); Response. addHeader ("Content-Disposition", "attachment?filename=mesdata.zip"); Response. addHeader ("Content-Length", fileInfo. length. toString (); Response. addHeader ("Content-Transfer-Encoding", "binary"); Response. contentType = "application/octet-stream"; Response. contentEncoding = System. text. encoding. getEncoding ("UTF-8"); Response. writeFile (fileInfo. fullName); Response. flush (); HttpContext. current. applicationInstance. completeRequest (); // delete a copy // File. delete (filePath); Response. close ();} else {// prompt message}