/// <summary>
        /// 压缩ZIP文件
        /// 支持多文件和多目录，或是多文件和多目录一起压缩
        /// </summary>
        /// <param name="list">待压缩的文件或目录集合</param>
        /// <param name="strZipName">压缩后的文件名</param>
        /// <param name="IsDirStruct">是否按目录结构压缩</param>
        /// <returns>成功：true/失败：false</returns>
        public static bool CompressMulti(List<string> list, string strZipName, bool IsDirStruct)
        {
            try
            {
                using (ZipFile zip = new ZipFile(Encoding.Default))//设置编码，解决压缩文件时中文乱码
                {
                    foreach (string path in list)
                    {
                        string fileName = Path.GetFileName(path);//取目录名称
                        //如果是目录
                        if (Directory.Exists(path))
                        {
                            if (IsDirStruct)//按目录结构压缩
                            {
                                zip.AddDirectory(path, fileName);
                            }
                            else//目录下的文件都压缩到Zip的根目录
                            {
                                zip.AddDirectory(path);
                            }
                        }
                        if (File.Exists(path))//如果是文件
                        {
                            zip.AddFile(path);
                        }
                    }
                    zip.Save(strZipName);//压缩
                    return true;
                }
            }
            catch (Exception)
            {
                return false;
            }
        }

　　　　　/// <summary>
        /// 解压ZIP文件
        /// </summary>
        /// <param name="strZipPath">待解压的ZIP文件</param>
        /// <param name="strUnZipPath">解压的目录</param>
        /// <param name="overWrite">是否覆盖</param>
        /// <returns>成功：true/失败：false</returns>
        public static bool Decompression(string strZipPath, string strUnZipPath, bool overWrite)
        {
            try
            {
                ReadOptions options = new ReadOptions();
                options.Encoding = Encoding.Default;//设置编码，解决解压文件时中文乱码
                using (ZipFile zip = ZipFile.Read(strZipPath, options))
                {
                    foreach (ZipEntry entry in zip)
                    {
                        if (string.IsNullOrEmpty(strUnZipPath))
                        {
                            strUnZipPath = strZipPath.Split('.').First();
                        }
                        if (overWrite)
                        {
                            entry.Extract(strUnZipPath, ExtractExistingFileAction.OverwriteSilently);//解压文件，如果已存在就覆盖
                        }
                        else
                        {
                            entry.Extract(strUnZipPath, ExtractExistingFileAction.DoNotOverwrite);//解压文件，如果已存在不覆盖
                        }
                    }
                    return true;
                }
            }
            catch (Exception)
            {
                return false;
            }
        }