asp.net 压缩解压缩zip文件(2)

        { 
            try 
            { 
                if (!Directory.Exists(dir)) 
                { 
                    Directory.CreateDirectory(dir); 
                } 
                ZipInputStream s = new ZipInputStream(File.OpenRead(file)); 
                ZipEntry theEntry; 
                while ((theEntry = s.GetNextEntry()) != null) 
                { 
                    string directoryName = Path.GetDirectoryName(theEntry.Name); 
                    string fileName = Path.GetFileName(theEntry.Name); 
                    if (directoryName != String.Empty) 
                    { 
                        Directory.CreateDirectory(dir + directoryName); 
                    } 
                    if (fileName != String.Empty) 
                    { 
                        FileStream streamWriter = File.Create(dir + theEntry.Name); 
                        int size = 2048; 
                        byte[] data = new byte[2048];