C # Implementation of rar compression and decompression of Files

C # Implementation of rar compression and decompression of Files

This document describes how to compress and decompress files in C. Share it with you for your reference. The specific analysis is as follows:

This program uses the WinRAR program to compress the file. For command line syntax, see WinRAR help.

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/// Use WinRAR for compression /// </Summary> /// <Param name = "path"> folder to be compressed (absolute path) </param> /// <Param name = "rarPath"> compressed. rar directory (absolute path) </param> /// <Param name = "rarName"> name (including suffix) of the compressed file </param> /// <Returns> true or false. True is returned if compression is successful. Otherwise, false is returned. </Returns> Public bool RAR (string path, string rarPath, string rarName) { Bool flag = false; String rarexe; // The complete path of WinRAR.exe RegistryKey regkey; // registry key Object regvalue; // key value String cmd; // WinRAR Command Parameters ProcessStartInfo startinfo; Process process; Try { Regkey = Registry. ClassesRoot. OpenSubKey (@ "Applications \ WinRAR.exe \ shell \ open \ command "); Regvalue = regkey. GetValue (""); // the key value is "d: \ Program Files \ WinRAR \ WinRAR.exe" "% 1" Rarexe = regvalue. ToString (); Regkey. Close (); Rarexe = rarexe. Substring (1, rarexe. Length-7); // d: \ Program Files \ WinRAR \ WinRAR.exe Directory. CreateDirectory (path ); // The compression command, which is equivalent to right-clicking on the folder (path) to be compressed-> WinRAR-> adding to the compressed file-> entering the compressed file name (rarName) Cmd = string. Format ("a {0} {1}-r", rarName, path ); Startinfo = new ProcessStartInfo (); Startinfo. FileName = rarexe; Startinfo. Arguments = cmd; // set Command Parameters Startinfo. WindowStyle = ProcessWindowStyle. Hidden; // hide the WinRAR window Startinfo. WorkingDirectory = rarPath; Process = new Process (); Process. StartInfo = startinfo; Process. Start (); Process. WaitForExit (); // wait for the winrar.exe process to exit indefinitely If (process. HasExited) { Flag = true; } Process. Close (); } Catch (Exception e) { Throw e; } Return flag; } /// <Summary> /// Decompress the package using WinRAR /// </Summary> /// <Param name = "path"> extract the file path (absolute) </param> /// <Param name = "rarPath"> storage directory of the. rar file to be decompressed (absolute path) </param> /// <Param name = "rarName"> name Of The. rar file to be decompressed (including the suffix) </param> /// <Returns> true or false. True is returned for successful decompression. Otherwise, false is returned. </Returns> Public bool UnRAR (string path, string rarPath, string rarName) { Bool flag = false; String rarexe; RegistryKey regkey; Object regvalue; String cmd; ProcessStartInfo startinfo; Process process; Try { Regkey = Registry. ClassesRoot. OpenSubKey (@ "Applications \ WinRAR.exe \ shell \ open \ command "); Regvalue = regkey. GetValue (""); Rarexe = regvalue. ToString (); Regkey. Close (); Rarexe = rarexe. Substring (1, rarexe. Length-7 ); Directory. CreateDirectory (path ); // Decompress the command, which is equivalent to right-clicking on the file to be compressed (rarName)-> WinRAR-> decompressing to the current folder Cmd = string. Format ("x {0} {1}-y", rarName, path ); Startinfo = new ProcessStartInfo (); Startinfo. FileName = rarexe; Startinfo. Arguments = cmd; Startinfo. WindowStyle = ProcessWindowStyle. Hidden; Startinfo. WorkingDirectory = rarPath; Process = new Process (); Process. StartInfo = startinfo; Process. Start (); Process. WaitForExit (); If (process. HasExited) { Flag = true; } Process. Close (); } Catch (Exception e) { Throw e; } Return flag; } /// <Summary> /// Use WinRAR for compression /// </Summary> /// <Param name = "path"> folder to be compressed (absolute path) </param> /// <Param name = "rarPath"> compressed. rar directory (absolute path) </param> /// <Param name = "rarName"> name (including suffix) of the compressed file </param> /// <Returns> true or false. True is returned if compression is successful. Otherwise, false is returned. </Returns> Public bool RAR (string path, string rarPath, string rarName) { Bool flag = false; String rarexe; // The complete path of WinRAR.exe RegistryKey regkey; // registry key Object regvalue; // key value String cmd; // WinRAR Command Parameters ProcessStartInfo startinfo; Process process; Try { Regkey = Registry. ClassesRoot. OpenSubKey (@ "Applications \ WinRAR.exe \ shell \ open \ command "); Regvalue = regkey. GetValue (""); // the key value is "d: \ Program Files \ WinRAR \ WinRAR.exe" "% 1" Rarexe = regvalue. ToString (); Regkey. Close (); Rarexe = rarexe. Substring (1, rarexe. Length-7); // d: \ Program Files \ WinRAR \ WinRAR.exe Directory. CreateDirectory (path ); // The compression command, which is equivalent to right-clicking on the folder (path) to be compressed-> WinRAR-> adding to the compressed file-> entering the compressed file name (rarName) Cmd = string. Format ("a {0} {1}-r", rarName, path ); Startinfo = new ProcessStartInfo (); Startinfo. FileName = rarexe; Startinfo. Arguments = cmd; // set Command Parameters Startinfo. WindowStyle = ProcessWindowStyle. Hidden; // hide the WinRAR window Startinfo. WorkingDirectory = rarPath; Process = new Process (); Process. StartInfo = startinfo; Process. Start (); Process. WaitForExit (); // wait for the winrar.exe process to exit indefinitely If (process. HasExited) { Flag = true; } Process. Close (); } Catch (Exception e) { Throw e; } Return flag; } /// <Summary> /// Decompress the package using WinRAR /// </Summary> /// <Param name = "path"> extract the file path (absolute) </param> /// <Param name = "rarPath"> storage directory of the. rar file to be decompressed (absolute path) </param> /// <Param name = "rarName"> name Of The. rar file to be decompressed (including the suffix) </param> /// <Returns> true or false. True is returned for successful decompression. Otherwise, false is returned. </Returns> Public bool UnRAR (string path, string rarPath, string rarName) { Bool flag = false; String rarexe; RegistryKey regkey; Object regvalue; String cmd; ProcessStartInfo startinfo; Process process; Try { Regkey = Registry. ClassesRoot. OpenSubKey (@ "Applications \ WinRAR.exe \ shell \ open \ command "); Regvalue = regkey. GetValue (""); Rarexe = regvalue. ToString (); Regkey. Close (); Rarexe = rarexe. Substring (1, rarexe. Length-7 ); Directory. CreateDirectory (path ); // Decompress the command, which is equivalent to right-clicking on the file to be compressed (rarName)-> WinRAR-> decompressing to the current folder Cmd = string. Format ("x {0} {1}-y", rarName, path ); Startinfo = new ProcessStartInfo (); Startinfo. FileName = rarexe; Startinfo. Arguments = cmd; Startinfo. WindowStyle = ProcessWindowStyle. Hidden; Startinfo. WorkingDirectory = rarPath; Process = new Process (); Process. StartInfo = startinfo; Process. Start (); Process. WaitForExit (); If (process. HasExited) { Flag = true; } Process. Close (); } Catch (Exception e) { Throw e; } Return flag; }

Run the cd command in dos or cmd to enter the winrar installation directory. Enter unrar and the following prompt is displayed:

Usage: unrar <command>-<switch 1>-<switch N> <compressed file> <file...>

<@ List file...> <decompress path \>

<Command>

E. decompress the compressed file to the current directory.

L [t, B] list compressed files [technical information, concise]

P print the file to the standard output device

T test compressed files

V [t, B] detailed list of compressed files [technical information, concise]

X decompress the file using the absolute path

<Switch>

-Stop Scanning

After the ac is compressed or unzipped, the archive attributes are cleared.

Ad: Add compressed file names to the target path

Ap <format> Add path to compressed file

Av-Disable User identity verification

C-Disable annotation display

Cfg-Disable read Configuration

Cl name to lowercase

Convert cu name to uppercase

Dh open shared files

Ep exclusion path from name

The ep3 extension path is the full path containing the drive letter.

F. Refresh the file

Id [c, d, p, q] disable messages

Ierr sends all messages to standard error Devices

Inul disables all messages

After ioff completes an operation, turn off the PC power supply.

Kb retains damaged decompressed files

N <File> only contains the specified file

N @ read the file name from the standard input device to include

N @ <list> include files in the specified file list

O + overwrite existing files

O-Do Not Overwrite existing files

Set NTFS compression attribute for oc

Or automatically rename the file

Ow save or restore the file owner and group

P [Password] Set Password

P-No Password inquiry

R recursive subdirectory

Ri

[:] Set the priority (0-default, 1-minimum... 15-maximum) and sleep time in milliseconds

Sl <size> process files smaller than the specified size

Sm <size> processes files larger than the specified size

File Modified after ta <date> Add date <date>, in the format of YYYYMMDDHHMMSS

File Modified before tb <date> Add date <date>, in the format of YYYYMMDDHHMMSS

Files after tn <time> Add <time>

To <time> add files earlier than <time>

Ts [N] file retention or recovery time (modify, create, access)

U Update file

V. list all volumes

Ver [n] file version control

Vp is paused before each volume

X <File> exclude specified files

X @ read the file name to be excluded from the standard input device

X @ <list> exclude objects in a specified list file

Y. If yes

Example of how to use WinRAR to decompress a file in DOS (cmd:

Suppose there is a winrar.rar in drive d. to decompress it to the hello folder in drive F, enter the following command under dos:

Unrar x d: \ winrar.rar F: \ hello \

I hope this article will help you with C # programming.