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本文實(shí)例講述了asp.net C#實(shí)現(xiàn)解壓縮文件的方法。一共給大家介紹了三段代碼，一個(gè)是簡(jiǎn)單的解壓縮單個(gè)zip文件，后一個(gè)可以解壓批量的大量的但需要調(diào)用ICSharpCode.SharpZipLib.dll類(lèi)了，最后一個(gè)比較實(shí)例可壓縮也可以解壓縮了分享給大家供大家參考。具體如下：
解壓縮單個(gè)文件：
代碼如下:
using System.IO;
using System.IO.Compression;
string sourceFile=@"D:2.zip";
string destinationFile=@"D:1.txt";
private const long BUFFER_SIZE = 20480;
// make sure the source file is there
if (File.Exists ( sourceFile ))
{
FileStream sourceStream = null;
FileStream destinationStream = null;
GZipStream decompressedStream = null;
byte[] quartetBuffer = null;
try
{
// Read in the compressed source stream
sourceStream = new FileStream ( sourceFile, FileMode.Open );
// Create a compression stream pointing to the destiantion stream
decompressedStream = new DeflateStream ( sourceStream, CompressionMode.Decompress, true );
// Read the footer to determine the length of the destiantion file
quartetBuffer = new byte[4];
int position = (int)sourceStream.Length - 4;
sourceStream.Position = position;
sourceStream.Read ( quartetBuffer, 0, 4 );
sourceStream.Position = 0;
int checkLength = BitConverter.ToInt32 ( quartetBuffer, 0 );
byte[] buffer = new byte[checkLength + 100];
int offset = 0;
int total = 0;
// Read the compressed data into the buffer
while ( true )
{
int bytesRead = decompressedStream.Read ( buffer, offset, 100 );
if ( bytesRead == 0 )
break;
offset += bytesRead;
total += bytesRead;
}
// Now write everything to the destination file
destinationStream = new FileStream ( destinationFile, FileMode.Create );
destinationStream.Write ( buffer, 0, total );
// and flush everyhting to clean out the buffer
destinationStream.Flush ( );
}
catch ( ApplicationException ex )
{
Console.WriteLine(ex.Message, "解壓文件時(shí)發(fā)生錯(cuò)誤：");
}
finally
{
// Make sure we allways close all streams
if ( sourceStream != null )
sourceStream.Close ( );
if ( decompressedStream != null )
decompressedStream.Close ( );
if ( destinationStream != null )
destinationStream.Close ( );
}
}
批量解壓縮(這需要調(diào)用一個(gè)解壓縮類(lèi)庫(kù)。。 ICSharpCode.SharpZipLib.dll)
代碼如下:
using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using ICSharpCode.SharpZipLib.Zip;
namespace ZipLib
{
/// <summary>
/// 解壓縮類(lèi)
/// </summary>
public static class ZIP
{
/// <summary>
/// 解壓ZIP文件包
/// </summary>
/// <param name="strZipFile">ZIP文件路徑</param>
/// <param name="strDir">解壓后的文件目錄路徑</param>
/// <returns>是否解壓成功</returns>
public static bool unzipFiles(string strZipFile, string strDir)
{
//判斷ZIP文件是否存在
if (File.Exists(strZipFile))
{
//判斷目錄是否存在
bool bUnzipDir = false;
//判斷是否需要?jiǎng)?chuàng)建目錄
if (!Directory.Exists(strDir))
bUnzipDir = (Directory.CreateDirectory(strDir) != null);
else
bUnzipDir = true;
//如果解壓目錄存在
if (bUnzipDir)
{
//獲得ZIP數(shù)據(jù)流
ZipInputStream zipStream = new ZipInputStream(File.OpenRead(strZipFile));
if (zipStream != null)
{
ZipEntry zipEntry = null;
while ((zipEntry = zipStream.GetNextEntry()) != null)
{
string strUnzipFile = strDir + "http://" + zipEntry.Name;
string strFileName = Path.GetFileName(strUnzipFile);
string strDirName = Path.GetDirectoryName(strUnzipFile);
//是否為解壓目錄
if (!string.IsNullOrEmpty(strDirName))
Directory.CreateDirectory(strDirName);
//是否為解壓文件
if (!string.IsNullOrEmpty(strFileName))
{
//解壓文件
FileStream unzipFileStream = new FileStream(strUnzipFile, FileMode.Create);
if (unzipFileStream != null)
{
byte[] buf = new byte[2048];
int size = 0;
while ((size = zipStream.Read(buf, 0, 2048)) > 0)
unzipFileStream.Write(buf, 0, size);
//關(guān)閉Stream
unzipFileStream.Flush();
unzipFileStream.Close();
}
}
}
//關(guān)閉ZIP流
zipStream.Close();
//返回值
return true;
}
}
}
return false;
}
}
}