需要SharpZipLib引用，ASP.NET 在线压缩与在线解压缩源码:using System;
002 using System.IO;
003 using ICSharpCode.SharpZipLib.Checksums;
004 using ICSharpCode.SharpZipLib.Zip;
005 using ICSharpCode.SharpZipLib.Zip.Compression;
006 using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
007
008 /// <summary>
009 /// 2005-7-9
010 /// 垃圾猪
011 /// ewebapp.net
012 /// </summary>
013 namespace eWebapp.Upload
014 {
015 /// <summary>
016 /// 压缩解压处理。
017 /// </summary>
018 public class eZip
019 {
020 #region 私有域
021 private string zipname = string.Empty;
022 private string password = string.Empty;
023 private int level = 9;
024 private string unzipdir = string.Empty;
025 private Crc32 crc;
026 ZipOutputStream s;
027 #endregion
028
029 #region 属性
030
031 /// <summary>
032 /// 压缩文件名称
033 /// </summary>
034 public string Zipname
035 {
036 set{ zipname = value;}
037 }
038
039 /// <summary>
040 /// 解压文件夹
041 /// </summary>
042 public string Unzipdir
043 {
044 set { unzipdir = value;}
045 }
046 /// <summary>
047 /// 压缩文件密码
048 /// </summary>
049 public string Password
050 {
051 set {password = value;}
052 }
053 /// <summary>
054 /// 压缩级别
055 /// </summary>
056 public int Level
057 {
058 set {level = value;}
059 }
060
061 public eZip()
062 {
063 //
064 // TODO: 在此处添加构造函数逻辑
065 //
066 }
067
068 #endregion
069
070 /// <summary>
071 /// 创建压缩文件
072 /// </summary>
073 public void CreateZip()
074 {
075 crc = new Crc32();
076 s = new ZipOutputStream(File.Create(this.zipname));
077 s.SetLevel(level);
078 s.Password = password;
079 }
080 /// <summary>
081 /// 结束操作
082 /// </summary>
083 public void FinishZip()
084 {
085 s.Finish();
086 s.Close();
087 }
088
089 /// <summary>
090 /// 增加一个文件
091 /// </summary>
092 /// <param name="_crc"></param>
093 /// <param name="_s"></param>
094 /// <param name="_filename"></param>
095 /// <param name="_filesize"></param>
096 /// <param name="_buffer"></param>
097 private void addFile(Crc32 _crc,ZipOutputStream _s,string _filename,long _filesize,byte[] _buffer)
098 {
099 // 添加一个文件到压缩文件中
100 ZipEntry entry = new ZipEntry(_filename);
101
102 entry.DateTime = DateTime.Now;
103
104 entry.Size = _filesize;
105
106
107 _crc.Reset();
108 _crc.Update(_buffer);
109
110 entry.Crc = _crc.Value;
111
112 _s.PutNextEntry(entry);
113
114 _s.Write(_buffer, 0, _buffer.Length);
115
116 }
117
118 /// <summary>
119 /// 添加一个文件到压缩文件中
120 /// </summary>
121 /// <param name="_filename"></param>
122 public void AddFile(string _filename)
123 {
124
125 FileStream fs = File.OpenRead(_filename);
126 byte[] buffer = new byte[fs.Length];
127 fs.Read(buffer, 0, buffer.Length);
128 string filename = System.IO.Path.GetFileName(_filename);
129 long m_fLength = fs.Length;
130 fs.Close();
131 addFile(this.crc,this.s,filename,m_fLength,buffer);
132 }
133
134 /// <summary>
135 /// 新建文本文件
136 /// </summary>
137 /// <param name="_crc"></param>
138 /// <param name="_s"></param>
139 /// <param name="_filename"></param>
140 /// <param name="_text"></param>
141 private void addText(Crc32 _crc,ZipOutputStream _s,string _filename,string _text)
142 {
143 byte[] text = System.Text.Encoding.Default.GetBytes(_text);
144 addFile(_crc,_s,_filename,text.Length,text);
145 }
146
147 /// <summary>
148 /// 添加一个指定内容的文本文件到压缩文件中
149 /// </summary>
150 /// <param name="_filename"></param>
151 /// <param name="_text"></param>
152 public void AddText(string _filename,string _text)
153 {
154 addText(this.crc,this.s,_filename,_text);
155 }
156
157
158 /// <summary>
159 /// 解压处理
160 /// </summary>
161 public void Unzip()
162 {
163
164 string unzipdirectoryroot = this.unzipdir;
165
166
167 // 调用组件中读取压缩文件的对象
168 ZipInputStream s = new ZipInputStream(File.OpenRead(this.zipname));
169 s.Password = this.password;
170
171 ZipEntry theEntry;
172
173
174 while ((theEntry = s.GetNextEntry()) != null)
175 {
176 // 当前解压到的目录，Path.GetDirectoryName(theEntry.Name)为提取压缩文件目录
177 string directoryName = Path.Combine(unzipdirectoryroot,Path.GetDirectoryName(theEntry.Name));
178 // 当前正在解压的文件
179 string fileName = Path.Combine(directoryName,Path.GetFileName(theEntry.Name));
180 // 创建目录
181 Directory.CreateDirectory(directoryName);
182
183 if (fileName != String.Empty)
184 {
185 try
186 {
187 // 创建解压文件
188 FileStream streamWriter = File.Create(fileName);
189 // 将数据写入文件
190 int size = 2048;
191 byte[] data = new byte[2048];
192 while (true)
193 {
194 size = s.Read(data, 0, data.Length);
195 if (size > 0)
196 {
197 streamWriter.Write(data, 0, size);
198 }
199 else
200 {
201 break;
202 }
203 }
204
205 streamWriter.Close();
206 }
207 catch
208 {
209 }
210
211 }
212 }
213 s.Close();
214 }
215
216 }
217 }
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