C#文件压缩成.Zip

使用的三方类库ICSharpCode.SharpZipLib.dll

方法如下：

 /// <summary>
        /// 压缩文件为zip格式
        /// </summary>
        /// <param name="filepath">文件地址</param>
        /// <param name="targetPath">目标路径</param>
        static bool CompressFiles(string filePath, string targetPath)
        {
            try
            {
                using (ZipOutputStream zipstream = new ZipOutputStream(File.Create(targetPath)))
                {
                    zipstream.SetLevel(9); // 压缩级别 0-9
                    byte[] buffer = new byte[4096]; //缓冲区大小
                    ZipEntry entry = new ZipEntry(Path.GetFileName(filePath));
                    entry.DateTime = DateTime.Now;
                    zipstream.PutNextEntry(entry);
                    using (FileStream fs = File.OpenRead(filePath))
                    {
                        int sourceBytes;
                        do
                        {
                            sourceBytes = fs.Read(buffer, 0, buffer.Length);
                            zipstream.Write(buffer, 0, sourceBytes);
                        }
                        while (sourceBytes > 0);
                    }
                    zipstream.Finish();
                    zipstream.Close();
                    return true;
                }
            }
            catch (Exception ex)
            {                
                return false;
            }
        }

 压缩文件夹

      /// <summary>
        /// 压缩文件夹
        /// </summary>
        /// <param name="strFile"></param>
        /// <param name="strZip"></param>
        /// <returns></returns>
        public static bool ZipFile(string strFile, string strZip)
        {
            try
            {
                if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
                {
                    strFile += Path.DirectorySeparatorChar;
                }
                ZipOutputStream outstream = new ZipOutputStream(File.Create(strZip));
                outstream.SetLevel(6);
                ZipCompress(strFile, outstream, strFile);
                outstream.Finish();
                outstream.Close();
                return true;
            }
            catch (Exception)
            {
                return false;
            }
        }

        public static void ZipCompress(string strFile, ZipOutputStream outstream, string staticFile)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
            {
                strFile += Path.DirectorySeparatorChar;
            }
            Crc32 crc = new Crc32();
            //获取指定目录下所有文件和子目录文件名称
            string[] filenames = Directory.GetFileSystemEntries(strFile);
            //遍历文件
            foreach (string file in filenames)
            {
                if (Directory.Exists(file))
                {
                    ZipCompress(file, outstream, staticFile);
                }
                //否则，直接压缩文件
                else
                {
                    //打开文件
                    FileStream fs = File.OpenRead(file);
                    //定义缓存区对象
                    byte[] buffer = new byte[fs.Length];
                    //通过字符流，读取文件
                    fs.Read(buffer, 0, buffer.Length);
                    //得到目录下的文件（比如:D:\Debug1\test）,test
                    string tempfile = file.Substring(staticFile.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempfile);
                    entry.DateTime = DateTime.Now;
                    entry.Size = fs.Length;
                    fs.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    outstream.PutNextEntry(entry);
                    //写文件
                    outstream.Write(buffer, 0, buffer.Length);
                }
            }
        }