How do I create a file AND any folders if the folders don t exist

Question

Imagine I wish to create  or overwrite  the following file  - C  Temp Bar Foo Test txt  Using the File Create     method  this can do it   BUT  if I don t have either one of the following folders  from that example path  above    Temp Bar Foo   then I get an DirectoryNotFoundException thrown   So    given a path  how can we recursively create all the folders necessary to create the file    for that path   If Temp or Bar folders exists  but Foo doesn t    then that is created also   For simplicity  lets assume there s no Security concerns -- all permissions are fine  etc

User · Answer

given a path  how can we recursively create all the folders necessary to create the file    for that path   Creates all directories and subdirectories as specified by path    Directory CreateDirectory path     then you may create a file

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DirectoryInfo di   Directory CreateDirectory path   Console WriteLine  The directory was created successfully at  0         Directory GetCreationTime path      See this MSDN page   Hope that helps out

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To summarize what has been commented in other answers     path     C  Temp Bar Foo Test txt   Directory CreateDirectory Path GetDirectoryName path      Directory CreateDirectory will create the directories recursively and if the directory already exist it will return without an error   If there happened to be a file Foo at C  Temp Bar Foo an exception will be thrown

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Assuming that your assembly exe has FileIO permission is itself  well is not right  Your application may not run with admin rights  Its important to consider Code Access Security and requesting permissions Sample code   FileIOPermission f2   new FileIOPermission FileIOPermissionAccess Read   C   test r    f2 AddPathList FileIOPermissionAccess Write   FileIOPermissionAccess Read   C   example  out txt    try       f2 Demand      catch  SecurityException s        Console WriteLine s Message       Understanding  NET Code Access Security  Is    Code Access Security    of any real world use

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You will need to check both parts of the path  directory and filename  and create each if it does not exist   Use File Exists and Directory Exists to find out whether they exist  Directory CreateDirectory will create the whole path for you  so you only ever need to call that once if the directory does not exist  then simply create the file

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You should use Directory CreateDirectory   http   msdn microsoft com en-us library 54a0at6s aspx

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Use Directory CreateDirectory before you create the file  It creates the folder recursively for you

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You want Directory CreateDirectory    Here is a class I use  converted to C   that if you pass it a source directory and a destination it will copy all of the files and sub-folders of that directory to your destination   using System IO   public class copyTemplateFiles     public static bool Copy string Source  string destination         try            string   Files   null           if  destination destination Length - 1     Path DirectorySeparatorChar                destination    Path DirectorySeparatorChar                     if   Directory Exists destination                 Directory CreateDirectory destination                      Files   Directory GetFileSystemEntries Source           foreach  string Element in Files                   Sub directories             if  Directory Exists Element                     copyDirectory Element  destination   Path GetFileName Element                  else                      Files in directory                 File Copy Element  destination   Path GetFileName Element   true                                  catch  Exception ex            return false             return true        private static void copyDirectory string Source  string destination        string   Files   null       if  destination destination Length - 1     Path DirectorySeparatorChar            destination    Path DirectorySeparatorChar             if   Directory Exists destination             Directory CreateDirectory destination              Files   Directory GetFileSystemEntries Source       foreach  string Element in Files               Sub directories         if  Directory Exists Element                 copyDirectory Element  destination   Path GetFileName Element              else                  Files in directory             File Copy Element  destination   Path GetFileName Element   true

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Following code will create directories  if not exists   amp  then copy files     using System IO      for ex  if you want to copy files from D  A  to D  B  foreach  var f in Directory GetFiles   quot D  A  quot    quot     quot   SearchOption AllDirectories         var fi    new FileInfo f       var di   new DirectoryInfo fi DirectoryName           you can filter files here     if  fi Name Contains  quot FILTER quot                 if   Directory Exists di FullName Replace  quot A quot    quot B quot                                                 Directory CreateDirectory di FullName Replace  quot A quot    quot B quot                            File Copy fi FullName  fi FullName Replace  quot A quot    quot B quot

[c#] How do I create a file AND any folders, if the folders don't exist?

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