C# 解压缩文件

c# 解压缩文件

需要通过引用icsharpcode.sharpziplib.zip（程序包里面下载安装），来实现文件的压缩与解压

/// <summary>
        /// 实例化fastzip
        /// </summary>
        public static fastzip fz = new fastzip();

/// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="zipfilepath">压缩文件的路径与名称</param>
        /// <param name="filepath">被压缩的文件路径</param>
        /// <param name="zippwd">解压密码（null代表无密码）</param>
        /// <returns></returns>
        public static string filetozip(string zipfilepath, string filepath, string zippwd)
        {
            string state = "fail...";
            try
            {
                fileinfo fi = new fileinfo(filepath);
                string filename = fi.name;
                string dirname = fi.directoryname;
                fz.password = zippwd;
                fz.createzip(zipfilepath, dirname, false, filename);

                state = "success !";
            }
            catch(exception ex)
            {
                state += "," + ex.message;
            }
            return state;
        }

/// <summary>
        /// 压缩文件夹
        /// </summary>
        /// <param name="dirpath">被压缩的文件夹路径</param>
        /// <param name="zippath">压缩文件夹的路径与名称</param>
        /// <param name="zippwd">解压密码（null代表无密码）</param>
        /// <returns></returns>
        public static string dirtozip(string dirpath, string zippath, string zippwd)
        {
            string state = "fail...";
            try
            {
                fz.password = zippwd;
                fz.createzip(zippath, dirpath, false, null);

                state = "success !";
            }
            catch (exception ex)
            {
                state += "," + ex.message;
            }
            return state;
        }

/// <summary>
        /// 解压zip
        /// </summary>
        /// <param name="dirpath">解压后存放路径</param>
        /// <param name="zippath">zip的存放路径</param>
        /// <param name="zippwd">解压密码（null代表无密码）</param>
        /// <returns></returns>
        public static string compress(string dirpath, string zippath, string zippwd)
        {
            string state = "fail...";
            try
            {
                fz.password = zippwd;
                fz.extractzip(zippath, dirpath, null);

                state = "success !";
            }
            catch (exception ex)
            {
                state += "," + ex.message;
            }
            return state;
        }