壓縮流GZipStream

1>檔案壓縮過程：

     1.建立讀取流File.OpenRead()
     2.建立寫入流File.OpenWrite();
     3.建立壓縮流new GZipStream();將寫入流作為參數與。
     4.每次通過讀取流讀取一部分資料，通過壓縮流寫入。

2>檔案解壓過程

     1.建立讀取流：File.OpenRead()
     2.建立壓縮流：new GZipStream();將讀取流作為參數
     3.建立寫入流File.OpenWrite();
     4.每次通過壓縮流讀取資料，通過寫入流寫入資料。

檔案壓縮舉例說明：

     //1.建立讀取文字檔的流
            using (FileStream fsRead = File.OpenRead("a.txt"))
            {
                //2.建立寫入文字檔的流
                using (FileStream fsWrite = File.OpenWrite("aa.txt"))
                {
                    //3.建立壓縮流
                    using (GZipStrZipStream zipStream = eam zipStream = new GZipStream(fsWrite, CompressionMode.Compress))
                    {
                        //4.每次讀取1024byte
                        byte[] byts = new byte[1024];
                        int len = 0;
                        while ((len = fsRead.Read(byts, 0, byts.Length)) > 0)
                        {
                            //通過壓縮流寫入檔案
                            zipStream.Write(byts, 0, len);
                        }
                    }
                }
            }
            Console.WriteLine("ok");
            Console.ReadKey();

檔案解舉例說明： 

  using (FileStream fsRead = File.OpenRead("yasuo.txt"))

 {

   using (GZipStream gzipStream = new GZipStream(fsRead, CompressionMode.Decompress))                

               {                    

                       using (FileStream fsWrite = File.OpenWrite("jieya.txt"))                    

                       {

                                byte[] byts = new byte[1024];                        

                                int len = 0;                        

                               while ((len = gzipStream.Read(byts, 0, byts.Length)) > 0)                                        

                                 {                            

                                             fsWrite.Write(byts, 0, len);                        

                                          }

                                   }                

                     }            

              }            

                  Console.WriteLine("ok");            

                 Console.ReadKey();