C#压缩解压zip 文件

  1 /// <summary>
  2 /// Zip 压缩文件
  3 /// </summary>
  4 public class Zip
  5 {
  6     public Zip()
  7     {
  8
  9     }
 10     #region 加压方法
 11     /// <summary>
 12     /// 功能：压缩文件（暂时只压缩文件夹下一级目录中的文件，文件夹及其子级被忽略）
 13     /// </summary>
 14     /// <param name="dirPath">被压缩的文件夹夹路径</param>
 15     /// <param name="zipFilePath">生成压缩文件的路径，为空则默认与被压缩文件夹同一级目录，名称为：文件夹名+.zip</param>
 16     /// <param name="err">出错信息</param>
 17     /// <returns>是否压缩成功</returns>
 18     public static bool ZipFile(string dirPath, string zipFilePath, out string err)
 19     {
 20         err = "";
 21         if (dirPath == string.Empty)
 22         {
 23             err = "要压缩的文件夹不能为空！";
 24             return false;
 25         }
 26         if (!Directory.Exists(dirPath))
 27         {
 28             err = "要压缩的文件夹不存在！";
 29             return false;
 30         }
 31         //压缩文件名为空时使用文件夹名＋.zip
 32         if (zipFilePath == string.Empty)
 33         {
 34             if (dirPath.EndsWith("//"))
 35             {
 36                 dirPath = dirPath.Substring(0, dirPath.Length - 1);
 37             }
 38             zipFilePath = dirPath + ".zip";
 39         }
 40
 41         try
 42         {
 43             string[] filenames = Directory.GetFiles(dirPath);
 44             using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath)))
 45             {
 46                 s.SetLevel(9);
 47                 byte[] buffer = new byte[4096];
 48                 foreach (string file in filenames)
 49                 {
 50                     ZipEntry entry = new ZipEntry(Path.GetFileName(file));
 51                     entry.DateTime = DateTime.Now;
 52                     s.PutNextEntry(entry);
 53                     using (FileStream fs = File.OpenRead(file))
 54                     {
 55                         int sourceBytes;
 56                         do
 57                         {
 58                             sourceBytes = fs.Read(buffer, 0, buffer.Length);
 59                             s.Write(buffer, 0, sourceBytes);
 60                         } while (sourceBytes > 0);
 61                     }
 62                 }
 63                 s.Finish();
 64                 s.Close();
 65             }
 66         }
 67         catch (Exception ex)
 68         {
 69             err = ex.Message;
 70             return false;
 71         }
 72         return true;
 73     }
 74     #endregion
 75
 76     #region 解压
 77     /// <summary>
 78     /// 功能：解压zip格式的文件。
 79     /// </summary>
 80     /// <param name="zipFilePath">压缩文件路径</param>
 81     /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>
 82     /// <param name="err">出错信息</param>
 83     /// <returns>解压是否成功</returns>
 84     public static bool UnZipFile(string zipFilePath, string unZipDir, out string err)
 85     {
 86         err = "";
 87         if (zipFilePath == string.Empty)
 88         {
 89             err = "压缩文件不能为空！";
 90             return false;
 91         }
 92         if (!File.Exists(zipFilePath))
 93         {
 94             err = "压缩文件不存在！";
 95             return false;
 96         }
 97         //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
 98         if (unZipDir == string.Empty)
 99             unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
100         if (!unZipDir.EndsWith("//"))
101             unZipDir += "//";
102         if (!Directory.Exists(unZipDir))
103             Directory.CreateDirectory(unZipDir);
104
105         try
106         {
107             using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
108             {
109
110                 ZipEntry theEntry;
111                 while ((theEntry = s.GetNextEntry()) != null)
112                 {
113                     string directoryName = Path.GetDirectoryName(theEntry.Name);
114                     string fileName = Path.GetFileName(theEntry.Name);
115                     if (directoryName.Length > 0)
116                     {
117                         Directory.CreateDirectory(unZipDir + directoryName);
118                     }
119                     if (!directoryName.EndsWith("//"))
120                         directoryName += "//";
121                     if (fileName != String.Empty)
122                     {
123                         using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
124                         {
125
126                             int size = 2048;
127                             byte[] data = new byte[2048];
128                             while (true)
129                             {
130                                 size = s.Read(data, 0, data.Length);
131                                 if (size > 0)
132                                 {
133                                     streamWriter.Write(data, 0, size);
134                                 }
135                                 else
136                                 {
137                                     break;
138                                 }
139                             }
140                         }
141                     }
142                 }//while
143             }
144         }
145         catch (Exception ex)
146         {
147             err = ex.Message;
148             return false;
149         }
150         return true;
151     }//解压结束
152     #endregion