csharp: Zip and Unzip files using GZipStream

 

 

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using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO.Compression; using System.IO; using System.Net;     namespace ThreeJsDemo {       /// <summary>     ///     /// </summary>     public partial class GZipStreamdemo : System.Web.UI.Page     {             /// <summary>         /// geovindu,Geovin Du         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         protected void Page_Load(object sender, EventArgs e)         {           }               /// <summary>         /// Code for zip         /// 压缩         /// </summary>         /// <param name="fileToCompress"></param>         /// <param name="newfile"></param>         public static void zipFile(FileInfo fileToCompress,string newfile)         {               using (FileStream originalFileStream = fileToCompress.OpenRead())             {                   if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".gz")                 {                       using (FileStream compressedFileStream = File.Create(newfile)) //fileToCompress.FullName + ".gz"                     {                           using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress))                         {                               originalFileStream.CopyTo(compressionStream);                           }                     }                 }             }           }               /// <summary>         /// Code for unzip         /// 解压         /// </summary>         /// <param name="fileToDecompress"></param>         public static void unzipFile(FileInfo fileToDecompress)         {             using (FileStream originalFileStream = fileToDecompress.OpenRead())             {                   string currentFileName = fileToDecompress.FullName;                 string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);                 using (FileStream decompressedFileStream = File.Create(newFileName))                 {                       using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress))                     {                           decompressionStream.CopyTo(decompressedFileStream);                     }                 }             }         }           /// <summary>         ///         /// </summary>         /// <param name="newfileName"></param>         /// <param name="value"></param>         public static void CompressStringToFile(string newfileName, string value)         {             // A.             // Write string to temporary file.             string temp = Path.GetTempFileName();             File.WriteAllText(temp, value);               // B.             // Read file into byte array buffer.             byte[] b;             using (FileStream f = new FileStream(temp, FileMode.Open))             {                 b = new byte[f.Length];                 f.Read(b, 0, (int)f.Length);             }               // C.             // Use GZipStream to write compressed bytes to target file.             using (FileStream f2 = new FileStream(newfileName, FileMode.Create))             using (GZipStream gz = new GZipStream(f2, CompressionMode.Compress, false))             {                 gz.Write(b, 0, b.Length);             }         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         protected void btnZip_Click(object sender, EventArgs e)         {             string filePath = Server.MapPath("/geovindu/");//"";             string newfile = Server.MapPath("/geovindu/geovindu.gz");             DirectoryInfo directorySelected;             try             {                   directorySelected = new DirectoryInfo(filePath);                 foreach (FileInfo fileToCompress in directorySelected.GetFiles())                 {                     zipFile(fileToCompress,newfile);                 }                // MessageBox.Show("Zip Created Successfully...");                Response.Write("Zip Created Successfully...");               }             catch (Exception ex)             {                 Response.Write(ex.Message.ToString());                // MessageBox.Show(Ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);             }         }         /// <summary>         ///         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         protected void btnUnzip_Click(object sender, EventArgs e)         {               string filePath = Server.MapPath("/geovindu/");// "";             DirectoryInfo directorySelected;             try             {                 directorySelected = new DirectoryInfo(filePath);                 foreach (FileInfo fileToDecompress in directorySelected.GetFiles("*.gz"))                 {                       unzipFile(fileToDecompress);                 }                 // MessageBox.Show("Unzip Created Successfully...");                 Response.Write("Unzip Created Successfully...");             }             catch (Exception ex)             {                 //MessageBox.Show(Ex.Message, Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);                 Response.Write(ex.Message.ToString());             }         }     } }

　　

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