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基于ICSharpCode.SharpZipLib组件的打包压缩目录的方法

一、NuGet下载ICSharpCode.SharpZipLib组件
打开NuGet管理器，搜索关键字:ICSharpCode.SharpZipLib,
然后选中安装ICSharpCode.SharpZipLib,这里选择版本为：1.3.3.11

压缩后文件样式：

二、打包压缩下载功能

//下载离线文件功能[WebMethod][ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = true)]public ResultData downloadBW(){ResultData r = new ResultData();r.Result = false;//     try{string ywxh = WebEnv.Instance.GetContextValue("ywxh");//string sql = "select xzdybm from sjsb_sbdata where ywxh='" + ywxh + "'";string xzdydm = this.getValueBySQL(sql);//string dir_ath_file = WebEnv.Instance.dir_ath_file_abs_path();string xzqdmDirPath = dir_ath_file + "\\" + xzdydm;string ywDirPath = dir_ath_file + "\\" + xzdydm + "\\" + ywxh;//生成zip压缩文件ywxh.zipstring rarPathFile = xzqdmDirPath + "\\" + ywxh + ".zip";//压缩this.createRAR(ywDirPath, rarPathFile);//r.Result = true;r.Data = xzdydm+ "/" + ywxh + ".zip";//输出下载文件/*FileInfo DownloadFile = new FileInfo(rarPathFile);HttpContext.Current.Response.Clear();HttpContext.Current.Response.ClearHeaders();HttpContext.Current.Response.Buffer = false;HttpContext.Current.Response.ContentType = "application/octet-stream";HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8) + ";charset=GB2312");HttpContext.Current.Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());HttpContext.Current.Response.WriteFile(DownloadFile.FullName);HttpContext.Current.Response.Flush();*/}catch (Exception ex){LogUtil.Error(ex.Message, ex);r.Result = false;r.Message = ex.Message;throw ex;}return r;}private bool createRAR(string ywDirPath, string rarPathFile){if (System.IO.File.Exists(rarPathFile) == true){System.IO.File.Delete(rarPathFile);}//using (ZipOutputStream zs = new ZipOutputStream(File.Create(rarPathFile))){zs.SetLevel(9);  //压缩级别0-9createZipFile(ywDirPath, zs);zs.Finish();zs.Close();}return true;}private void createZipFile(string source,ZipOutputStream zs){Crc32 crc = new Crc32();string[] files = Directory.GetFileSystemEntries(source);foreach(var file in files){if(Directory.Exists(file)){  //如果是文件夹里有文件则递归this.createZipFile(file, zs);}else{   //如果不是则压缩using (FileStream fs = File.OpenRead(file)){byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);//获得当前文件路径的目录+文件名string tempFileName = file.Replace(source.Substring(0,source.LastIndexOf("\\")), "");// file.Substring(file.LastIndexOf("\\") + 1);//ZipEntry entry = new ZipEntry(tempFileName);entry.DateTime = DateTime.Now;entry.Size = fs.Length;fs.Close();crc.Reset();crc.Update(buffer);entry.Crc = crc.Value;zs.PutNextEntry(entry);zs.Write(buffer, 0, buffer.Length);}}}}