Use icsharpcode. sharpziplib. dll in C # To Compress and decompress files/folders.

Icsharpcode. sharpziplib. dll

1. compress the logs in a specified directory, compress the logs to the compressiondirectory folder, and clear the uncompressed logs.

# Region: compresslogdic () {try {string logfilepath = appdomain. currentdomain. basedirectory + "logs"; directoryinfo logsdic = new directoryinfo (logfilepath); fileinfo [] biplog = logsdic. getfiles (); datetime dt = datetime. now; List <fileinfo> logsinoneday = new list <fileinfo> (); For (INT I = 0; I <biplog. length; I ++) {If (biplog [I]. name. substring (biplog [I]. name. length -3 )! = "Zip") {logsinoneday. Add (biplog [I]) ;}} if (logsinoneday. Count> 0) {try {If (! Directory. exists (logsdic. fullname + "\ compressiondirectory") {directory. createdirectory (logsdic. fullname + "\ compressiondirectory");} string compressfilename = DT. tostring ("yyyy-mm-dd"); If (file. exists (logsdic. fullname + "\ compressiondirectory \" + dt. tostring ("yyyy-mm-dd") + ". zip ") {guid = guid. newguid (); compressfilename = compressfilename + "-" + guid. tostring ();} compressfilename + = ". zip "; compress (logsinoneday, logsdic. fullname + "\ compressiondirectory \" + compressfilename, 9,100); foreach (fileinfo in logsinoneday) {try {fileinfo. delete ();} catch (exception e) {// handle error information} catch (exception e) {// handle error message records} catch (exception E) {// error message record processing} # endregion

2. compressiondirectory: compressiondirectory.

# Region compresslogsdic () {try {string logfilepath = appdomain. currentdomain. basedirectory + "logs"; directoryinfo logsdic = new directoryinfo (logfilepath); fileinfo [] biplog = logsdic. getfiles (); datetime dt = datetime. now; directoryinfo [] sublosgdic = logsdic. getdirectories (); foreach (directoryinfo bankdic in sublosgdic) {dt = datetime. now; biplog = bankdic. get Files (); List <fileinfo> logsinoneday = new list <fileinfo> (); For (INT I = 0; I <biplog. length; I ++) {If (biplog [I]. name. substring (biplog [I]. name. length-3 )! = "Zip") {logsinoneday. Add (biplog [I]) ;}} if (logsinoneday. Count> 0) {try {If (! Directory. exists (bankdic. fullname + "\ compressiondirectory") {directory. createdirectory (bankdic. fullname + "\ compressiondirectory");} string compressfilename = DT. tostring ("yyyy-mm-dd"); If (file. exists (bankdic. fullname + "\ compressiondirectory \" + dt. tostring ("yyyy-mm-dd") + ". zip ") {guid = guid. newguid (); compressfilename = compressfilename + "-" + guid. tostring ();} compressfilename + = ". zip "; compress (logsinoneday, bankdic. fullname + "\ compressiondirectory \" + compressfilename, 9,100); foreach (fileinfo in logsinoneday) {try {fileinfo. delete ();} catch (exception e) {// handle error messages }}} catch (exception E) {// error message record processing }}} catch (exception e) {// error message record processing }}# endregion

3. compressed files

# Region compressed file /// <summary> // compressed file /// </Summary> /// <Param name = "filenames"> list of files to be packaged </ param> /// <Param name = "gzipfilename"> target file name </param> /// <Param name = "compressionlevel"> compression quality level (0 ~ 9) </param> // <Param name = "sleeptimer"> sleep time (unit: milliseconds) </param> Public static void compress (list <fileinfo> filenames, string gzipfilename, int compressionlevel, int sleeptimer) {zipoutputstream S = new zipoutputstream (file. create (gzipfilename); try {S. setlevel (compressionlevel); // 0-store only to 9-means best compression foreach (fileinfo file in filenames) {filestream FS = NULL; try {FS = File. Open (filemode. open, fileaccess. readwrite);} catch {continue;} // read files in batches into the buffer byte [] DATA = new byte [2048]; int size = 2048; zipentry entry = new zipentry (path. getfilename (file. name); entry. datetime = (file. creationtime> file. lastwritetime? File. lastwritetime: file. creationtime); S. putnextentry (entry); While (true) {size = FS. read (data, 0, size); If (size <= 0) break; S. write (data, 0, size);} FS. close (); thread. sleep (sleeptimer) ;}} finally {S. finish (); S. close () ;}# endregion

4. Extract

# Region decompress the file /// <summary> /// decompress the file /// </Summary> /// <Param name = "gzipfile"> compressed package file name </param>/ // <Param name = "targetpath"> decompress the target path </param> Public static void decompress (string gzipfile, string targetpath) {// string directoryname = path. getdirectoryname (targetpath + "//") + "//"; string directoryname = targetpath; If (! Directory. exists (directoryname) directory. createdirectory (directoryname); // generate the extract directory string currentdirectory = directoryname; byte [] DATA = new byte [2048]; int size = 2048; zipentry theentry = NULL; using (zipinputstream S = new zipinputstream (file. openread (gzipfile) {While (theentry = S. getnextentry ())! = NULL) {If (theentry. isdirectory) {// This node is the directory if (! Directory. exists (currentdirectory + theentry. Name) directory. createdirectory (currentdirectory + theentry. Name);} else {If (theentry. Name! = String. empty) {// check whether the multi-level directory exists if (theentry. name. contains ("//") {string parentdirpath = theentry. name. remove (theentry. name. lastindexof ("//") + 1); If (! Directory. exists (parentdirpath) {directory. createdirectory (currentdirectory + parentdirpath) ;}// extract the file to the specified directory using (filestream streamwriter = file. create (currentdirectory + theentry. name) {While (true) {size = S. read (data, 0, Data. length); If (size <= 0) break; streamwriter. write (data, 0, size);} streamwriter. close () ;}}} S. close () ;}# endregion

5. compressing folders

# Region compressed folder /// <summary> // compressed folder /// </Summary> /// <Param name = "dirpath"> folder to be packaged </Param> /// <Param name = "gzipfilename"> target file name </param> /// <Param name = "compressionlevel"> compression quality level (0 ~ 9) </param> // <Param name = "deletedir"> whether to delete the original folder </param> Public static void compressdirectory (string dirpath, string gzipfilename, int compressionlevel, bool deletedir) {// when the compressed file is empty, if (gzipfilename = string. empty) {gzipfilename = dirpath. substring (dirpath. lastindexof ("//") + 1); gzipfilename = dirpath. substring (0, dirpath. lastindexof ("//") + "//" + gzipfilename + ". zip ";} // If (Path. Getextension (gzipfilename )! = ". Zip ") // {// gzipfilename = gzipfilename + ". zip "; //} using (zipoutputstream = new zipoutputstream (file. create (gzipfilename) {zipoutputstream. setlevel (compressionlevel); icsharpcode. sharpziplib. checksums. CRC32 CRC = new icsharpcode. sharpziplib. checksums. CRC32 (); dictionary <string, datetime> filelist = getallfies (dirpath); foreach (keyvaluepair <string, datetime> item in filelist) {filestream FS = file. openread (item. key. tostring (); byte [] buffer = new byte [FS. length]; FS. read (buffer, 0, buffer. length); zipentry entry = new zipentry (item. key. substring (dirpath. length); entry. datetime = item. value; entry. size = FS. length; FS. close (); CRC. reset (); CRC. update (buffer); entry. CRC = CRC. value; zipoutputstream. putnextentry (entry); zipoutputstream. write (buffer, 0, buffer. length) ;}} if (deletedir) {directory. delete (dirpath, true) ;}# endregion

6. Get all files

# Region get all files /// <summary> /// get all files /// </Summary> /// <returns> </returns> Private Static dictionary <string, datetime> getallfies (string DIR) {dictionary <string, datetime> fileslist = new dictionary <string, datetime> (); directoryinfo filedire = new directoryinfo (DIR); If (! Filedire. exists) {Throw new system. Io. filenotfoundexception ("Directory:" + filedire. fullname + "not found! ");} Getalldirfiles (filedire, fileslist); getalldirsfiles (filedire. getdirectories (), fileslist); Return fileslist;} # endregion

7. Get the files in all folders in a folder

# Region get the files in all folders in a folder /// <summary> /// get the files in all folders in a folder /// </Summary> // /<Param name = "dirs"> </param> // <Param name = "fileslist"> </param> Private Static void getalldirsfiles (directoryinfo [] dirs, dictionary <string, datetime> fileslist) {foreach (directoryinfo dir in dirs) {foreach (fileinfo file in Dir. getfiles ("*. * ") {fileslist. add (file. fullname, file. lastwritetime);} getalldirsfiles (dir. getdirectories (), fileslist) ;}# endregion

8. Get files in a folder

# Region get the file in a folder /// <summary> /// get the file in a folder /// </Summary> /// <Param name = "dir"> directory name </param> /// <Param name = "fileslist"> file list hasttable </param> Private Static void getalldirfiles (directoryinfo Dir, dictionary <string, datetime> fileslist) {foreach (fileinfo file in Dir. getfiles ("*. * ") {fileslist. add (file. fullname, file. lastwritetime) ;}# endregion

Use icsharpcode. sharpziplib. dll in C # To Compress and decompress files/folders.