Asp.net uses the zip method to batch export txt files and asp. netzip to export txt files

Asp.net uses the zip method to batch export txt files and asp. netzip to export txt files

First:

Reference ICSharpCode. SharpZipLib. dll, Baidu download

Then reference the namespace:

Using ICSharpCode. SharpZipLib. Zip;
Using ICSharpCode. SharpZipLib. Checksums;

My own code:

// Fetch data dt

                      string path = Server.MapPath("~\\tempzt\\");

If (dt. rows. count> 0) {System. text. stringBuilder sb = new System. text. stringBuilder (); string wjmc = "xxxxxxxxxxxx ". txt "; for (int n = 0; n <dt. rows. count; n ++) {for (int m = 0; m <dt. columns. count; m ++) {sb. append (dt. rows [n] [m]. toString (); sb. append ("\ t");} sb. append ("\ r \ n") ;}txt_export (sb, wjmc, path) ;}// zip download string [] files = Directory. getFiles (path); if (files. length> 0) {stri Ng name = "xxxxxxxxxxxx.zip"; ZipFileMain (files, path + name, 9); DownLoadZip (path + name, name);} else {Response. write ("<script> alert ('no target file! Write ') </script> ");}
Public void txt_export (StringBuilder sb, string wjmc, string path) {// zip download string txtPath = path + wjmc; if (! Directory. exists (path) {Directory. createDirectory (path);} if (File. exists (txtPath) {File. delete (txtPath);} StreamWriter sw = new StreamWriter (txtPath, false, System. text. encoding. default); sw. write (sb. toString (); sw. close (); // zip download} // zip download // <summary> // compressed file // </summary> // <param name = "fileName"> to be compressed all files (full path) </param> /// <param name = "name"> compressed file path </param> /// <param name = "Level"> Compression Level </param> public void ZipFileMain (string [] filenames, string name, int Level) {if (File. exists (name) {File. delete (name);} ZipOutputStream s = new ZipOutputStream (File. create (name); Crc32 crc = new Crc32 (); // compression level s. setLevel (Level); // 0-store only to 9-means best compression try {foreach (string file in filenames) {if (! Path. getExtension (file ). equals (". txt ") {continue;} // open the compressed File FileStream fs = File. openRead (file); // file address byte [] buffer = new byte [fs. length]; fs. read (buffer, 0, buffer. length); // create a compressed object ZipEntry entry = new ZipEntry (Path. getFileName (file); // original file name // time entry. dateTime = DateTime. now; // space size entry. size = fs. length; fs. close (); crc. reset (); crc. update (buffer); entry. crc = crc. value; s. putNextEntry (entry); s. write (buffer, 0, buffer. length); File. delete (file) ;}} catch {throw;} finally {s. finish (); s. close () ;}} public void DownLoadZip (string fileName, string name) {Response. contentType = "application/x-zip-compressed"; Response. addHeader ("Content-Disposition", "attachment; filename =" + name + ""); Response. transmitFile (fileName );}