//遍历服务器指定文件夹下的所有文件

             string path = "uploads/Image/";

             string serverPath = Server.MapPath(path);

             //创建临时文件夹

             string tempName = DateTime.Now.ToString("yyyyMMddHHMMss");

             string tempFolder = Path.Combine(serverPath, tempName);

             Directory.CreateDirectory(tempFolder);

             DirectoryInfo folder = new DirectoryInfo(serverPath);

             foreach (FileInfo file in folder.GetFiles())

             {

                 string filename = file.Name;

                 File.Copy(serverPath + "/" + filename, tempFolder + "/" + filename);

             }

             //ZKHelper.JSHelper.Alert("图片拷贝成功!");

             //产生RAR文件，及文件输出

             RARSave(tempFolder, tempName);

             DownloadRAR(tempFolder + "\\" + tempName + ".rar");

         /// <summary>

         /// 生成RAR文件

         /// </summary>

         /// <param name="path">存放复制文件的目录</param>

         /// <param name="rarPatch">RAR文件存放目录</param>

         /// <param name="rarName">RAR文件名</param>

         private void RARSave(string rarPatch, string rarName)

         {

             string the_rar;

             RegistryKey the_Reg;

             Object the_Obj;

             string the_Info;

             ProcessStartInfo the_StartInfo;

             Process the_Process;

             try

             {

                 the_Reg = Registry.ClassesRoot.OpenSubKey(@"WinRAR");

                 the_Obj = the_Reg.GetValue("");

                 the_rar = the_Obj.ToString();

                 the_Reg.Close();

                 the_rar = the_rar.Substring(, the_rar.Length - );

                 the_Info = " a " + rarName + " -r";

                 the_StartInfo = new ProcessStartInfo();

                 the_StartInfo.FileName = "WinRar";//the_rar;

                 the_StartInfo.Arguments = the_Info;

                 the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

                 //打包文件存放目录

                 the_StartInfo.WorkingDirectory = rarPatch;

                 the_Process = new Process();

                 the_Process.StartInfo = the_StartInfo;

                 the_Process.Start();

                 the_Process.WaitForExit();

                 the_Process.Close();

             }

             catch (Exception)

             {

                 throw;

             }

         }    

         /// <summary>

         /// 下载生成的RAR文件

         /// </summary>

         private void DownloadRAR(string file)

         {

             FileInfo fileInfo = new FileInfo(file);

             Response.Clear();

             Response.ClearContent();

             Response.ClearHeaders();

             Response.AddHeader("Content-Disposition", "attachment;filename=" + fileInfo.Name);

             Response.AddHeader("Content-Length", fileInfo.Length.ToString());

             Response.AddHeader("Content-Transfer-Encoding", "binary");

             Response.ContentType = "application/octet-stream";

             Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");

             Response.WriteFile(fileInfo.FullName);

             Response.Flush();

             string tempPath = file.Substring(, file.LastIndexOf("\\"));

             //删除临时目录下的所有文件

             DeleteFiles(tempPath);

             //删除空目录

             Directory.Delete(tempPath);

             Response.End();

         }    

          /// <summary>

         /// 删除临时目录下的所有文件

         /// </summary>

         /// <param name="tempPath">临时目录路径</param>

         private void DeleteFiles(string tempPath)

         {

             DirectoryInfo directory = new DirectoryInfo(tempPath);

             try

             {

                 foreach (FileInfo file in directory.GetFiles())

                 {

                     if (file.Attributes.ToString().IndexOf("ReadOnly") != -)

                     {

                         file.Attributes = FileAttributes.Normal;

                     }

                     File.Delete(file.FullName);

                 }

             }

             catch (Exception)

             {

                 throw;

             }

         }