Asp. NET bulk Download files

First, the implementation of steps

In the user interface, the user selects the files that need to be downloaded, the system creates a temporary folder on the server to store the selected files based on the selected files, and copies the selected files to a temporary folder. Then the RAR program is called, the Temp folder is compressed, and then output to the client. Finally, delete the Temp folder.

Second, the Code implementation

1, ASP. NET bulk Download core codeC # codeCopy

//Traverse all files under the specified folder of the server StringPath= "uploads/image/";StringServerpath=Server.MapPath (path);//Create a temporary folder StringTempname=DateTime.Now.ToString ("Yyyymmddhhmmss");StringTempFolder=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 ("Picture copy succeeded!"); // generate RAR file, and file output   rarsave (TempFolder, tempname); Downloadrar (tempfolder  +   " \\\\ "   +  tempname  +   " . rar  ");                

2, Rarsave (string tempfolder, String tempname) method

C # codeCopy

/// <summary> ///Generate RAR File/// </summary> /// <param name= "Path" >directory where the copied files are stored</param> /// <param name= "Rarpatch" >RAR File storage Directory</param> /// <param name= "Rarname" >RAR file name</param> Private voidRarsave (StringRarpatch,StringRarname){StringThe_rar; RegistryKey The_reg; Object The_obj;StringThe_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 (1, The_rar. Length- 7); 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; // Packaging Files directory   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 ;} }                 /span>                

3. Downloadrar (string file) method

C # codeCopy

/// <summary> ///Download the generated RAR file/// </summary> Private voidDownloadrar (StringFile{FileInfo FileInfo= NewFileInfo (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 ( 0 , file. LastIndexOf ( " \\\\ " )); // Delete all files under the temp directory   deletefiles (TempPath); // Delete empty directory   directory.delete (TempPath); Response.End (); }                  

4, Deletefiles (string temppath) method

C # codeCopy

/// <summary> ///Delete all files in temp directory/// </summary> /// <param name= "TempPath" >Temp directory path</param> Private voidDeletefiles (StringTempPath)  {DirectoryInfo directory  =   new  DirectoryInfo (TempPath);  try    { foreach  (FileInfo file  in  Directory. GetFiles ())   { if  (file. Attributes.tostring (). IndexOf ( " ReadOnly " ) ! =  - 1 )   {file. Attributes  =  fileattributes.normal;}  File.delete (File. FullName); } }   catch  (Exception)   { throw ;} }                 /span>                

ASP. NET bulk Download file