C # Operations on files (Basic read-write and compression and decompression)

Mainly for a single file for read and write operations and compression operations: The main C # classes used are FileStream, FileInfo, Streamwrite, Streamread, GZipStream.

Conversion of character arrays and byte arrays:

 1 byte[] bytedata = new byte[200]; 2 char[] Chardata = new char[200];                 3 Try 4 {5 FileStream fs = new FileStream ("app. config", FileMode.Open); 6 Fs. Seek (0, Seekorigin.begin); 7 fs. Read (bytedata, 0, 200); 8} 9 catch (IOException io) ten {Console.WriteLine (IO). ToString ()); Console.readkey (); return;14}15 Decoder dc = Enc Oding. UTF8. Getdecoder ();//Create a decoder used to decode a binary array into a character array of DC. GetChars (bytedata, 0, Bytedata. Length, Chardata, 0); Console.WriteLine (Chardata); Console.readkey (); byte[] Byt Edata;20 char[] chardata;21 try22 {FileStream fs = new FileStream (" Log.txt ", filemode.create); chardata =" This is the user first log the software ". ToCharArray (); Encoder E = Encoding.UTF8.GetEncoder (); bytedata = new byte[chardata.length];27 e.getbytes (char Data, 0, Chardata.length, bytedata, 0, True), FS. Seek (0, Seekorigin.end); fs.                 Write (bytedata, 0, Bytedata.length),}31 catch (IOException io) 32 {33 Console.WriteLine (IO. ToString ()); Console.readkey (); return;36}37 Console.readkey ( );

Compress and decompress files (an example of a single file):

 1 string fileName = "CompressedFile.txt"; 2 Console.WriteLine ("Please input a word and it'll repeate"); 3 String inputstring = Console.ReadLine (); 4 StringBuilder sourcestring = new StringBuilder (inputstring.length * 100);             5 for (int i = 0; i < i++) 6 {7 sourcestring.appendline (inputstring); 8 } 9 String sourcecompresses = Sourcestring.tostring (); Console.WriteLine ("Source Dat  A ' s length is {0} ", sourcecompresses.length); try12 {compressedfile (FileName, sourcecompresses); Console.WriteLine ("Compressed successfully"); FileInfo FileInfo =                 New FileInfo (FileName); Console.WriteLine ("Compressed file ' s length is{0}", fileinfo.length); 17  String loadcompressed = Loadcompressedfile (FileName); Console.WriteLine (loadcompressed); 19           }20 catch (IOException io) {Console.WriteLine (IO). ToString ()); Console.readkey (); return;25}26 Console.readkey (             );}28 private static void Compressedfile (String fileName, string sourcecompress) 30 {31 FileStream fs = new FileStream (FileName, FileMode.Create, FileAccess.Write); GZipStream gzcompressed File = new GZipStream (FS, compressionmode.compress), StreamWriter sw = new StreamWriter (gzcompressedfile,enc Oding. UTF8); SW. Write (sourcecompress); Close ();}37 loadcompressedfile-Private static string (string FileName) eSTREAM fs = new FileStream (FileName, FileMode.Open, FileAccess.Read); GZipStream gzloadcompressed = new GZi PStream (FS, compressionmode.decompress), StreamReader sr = new StreamReader (GzLOADCOMPRESSED,ENCODING.UTF8); StringBuilder strbuild = new StringBuilder (); = Sr. ReadLine (); (!string.  IsNullOrEmpty (Strreadline)) (Strreadline strbuild.append (strreadline); = Sr. ReadLine ();}50 return strbuild.tostring (); 51}

C # Operations on files (Basic read-write and compression and decompression)