Why is access to the path denied

Question

I am having a problem where I am trying to delete my file but I get an exception   if  result     Success          if  FileUpload HasFile                  try                          File Delete Request PhysicalApplicationPath   app settings login images   txtUploadStatus Text                 string filename   Path GetFileName btnFileUpload FileName                 btnFileUpload SaveAs Request PhysicalApplicationPath   app settings login images   filename                       catch  Exception ex                            Message ex ToString                            Also I should note that the folder I am trying to delete from has full control to network services   The full exception message is      System UnauthorizedAccessException  Access to the path  C  Users gowdyn Documents Visual Studio 2008 Projects hybrid hybrid temp loginimages enviromental jpg  is denied  at System IO   Error WinIOError Int32 errorCode  String maybeFullPath  at System IO File Delete String path  at hybrid User Controls Imgloader Add Edit Tbl btnUpdate Click Object sender  EventArgs e  in C  Users gowdyn Documents Visual Studio 2008 Projects hybrid hybrid User Controls Imgloader Add Edit Tbl ascx cs line 242    Any ideas

User · Answer

The exception that is thrown when the operating system denies access because of an I/O error or a specific type of security error.

I hit the same thing. Check to ensure that the file is NOT HIDDEN.

User · Answer

According to File Delete Method     An UnauthorizedAccessException means one of 4 things    The caller does not have the required permission  The file is an executable file that is in use  Path is a directory  Path specified a read-only file

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I got the error because I didn t realize that the destination should be a file  I had a folder as the second parameter  which works in cmd   and I got Unhandled Exception  System UnauthorizedAccessException  Access to the path is denied  because C  File Move wants a file there  not just for the first parameter  but for the second too  and so if you put a directory as second parameter  it s trying to write a file like c  crp when you have a directory called c  crp   this would be incorrect  File Move args 0   c   crp     So  this would be correct    File Move args 0   c   crp  a a     The same goes for File Copy

User · Answer

An UnauthorizedAccessException exception is thrown when the operating system denies access because of an I O error or a security error   If you are attempting to access a file or registry key  make sure it is not read-only

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I had the exact error when deleting a file  It was a Windows Service running under a Service Account which was unable to delete a  pdf document from a Shared Folder even though it had Full Control of the folder   What worked for me was navigating to the Security tab of the Shared Folder   Advanced   Share   Add   I then added the service account to the administrators group  applied the changes and the service account was then able to perform all operations on all files within that folder

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I had the same problem on a newly moved website on a shared server  Solved through the web host panel  DotNetPanel  setting true the  allow write permissions   So if you are in a shared server before reviewing all code worth taking a look at the server configuration and could save you a lot of time

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When a user tries to connect to your Web site  IIS assigns the connection to the IUSER ComputerName account  where ComputerName is the name of the server on which IIS is running  By default  the IUSER ComputerName account is a member of the Guests group  This group has security restrictions  Try to grand access to IUSER ComputerName to that folder  Here is very good described answer about IIS security  Hope this helps

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I was facing this error because   Sometimes when I Combine the path with File Name and FileName       It become Path Directory not a file which is a problem as mentioned above  so you must check for FileName like this  if itemUri              File Delete Path Combine RemoteDirectoryPath  itemUri

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Be aware that if you are trying to reach a shared folder path from your code  you dont only need to give the proper permissions to the physicial folder thru the security tab  You also need to  share  the folder with the corresponding app pool user thru the Share Tab

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This is an old issue  but I ran into it while searching  Turns out that I was missing the actual filename component in the save path for SaveAs     string uploadPath   Server MapPath    uploads    file SaveAs uploadPath      BAD file SaveAs Path Combine uploadPath  file FileName       GOOD

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I got this error and solved it in just a moment  Don t know why all of my folders are read-only I cancelled the read-only and apply it  However  it is still read-only  So I moved the file into the root folder  it works - so weird

User · Answer

You need to modify the privileges of the folder you re trying to delete from save to  Right-click on the containing folder and use the Security tab to permit modify rights for the user your application runs under

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First just check the path if the colon    character is missing or not after the drive letter  If colon is not missing then you can check if access write permission is granted for that path  I had the same issue and i was only missing the colon  permission and everything else was fine   C  folderpath   will work fine but   C folderpath           missing colon    will give you access denial error

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I had this error thrown when I tried to rename a folder very rapidly after it had been either moved or created    A simple System Threading Thread Sleep 500   solved it   void RenameFile string from  string to       try               System IO File Move from  to                   catch                System Threading Thread Sleep 500                RenameFile from  to

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same issue for me too   I was pointing the folder instead of file    so make sure in path  give path filename  System IO File WriteAllBytes  path   bytearray

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I also had the problem  hence me stumbling on this post  I added the following line of code before and after a Copy   Delete   Delete  File SetAttributes file  FileAttributes Normal   File Delete file     Copy  File Copy file  dest  true   File SetAttributes dest  FileAttributes Normal

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I have found that this error can occur in DESIGN MODE as opposed to   execution mode    If you are doing something such as creating a class member which requires access to an  INI or  HTM file  configuration file  help file  you might want to NOT initialize the item in the declaration   but initialize it later in FORM Load   etc    When you DO initialize    Use a guard IF statement            lt summary gt FORM  BasicApp - Load lt  summary gt      private void BasicApp Load object sender  EventArgs e                   Setup Main Form Caption with App Name and Config Control Info         if   DesignMode                        m Globals   new Globals                Text   TGG GetApplicationConfigInfo                      This will keep the MSVS Designer from trying to create an INI or HTM file when you are in design mode

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I also ran into this post as dealing with the same issue  Looks like the file is in use and hence not able to write to it   Though not able to figure it out  which process is using it  Signed out the other user who was logged in in that box  dont see any users who is holding it  Any quick tips regarding on how to find the same   Thanks  Lakshay  developer

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If you re using BitDefender there s a good chance its Safe Files feature blocked your operation  This is a form of Ransomware protection that comes with some of its more advanced versions   Make sure to grant your application access in BitDefender and try again   Some more details can be found in this BitDefender support page

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Check your files properties  If the read-only is checked  uncheck it  This was my personal issue with the UnauthorizedAccessException

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In my particular case I was repeatedly creating and deleting 10000 folders  It seems to me that the problem was in that although the method Directory Delete path  true  returns  the underling OS mechanism may still be deleting the files from the disk  And when I am starting to create new folders immediately after deletion of old ones  some of them are still locked because they are not completely deleted yet  And I am getting System UnauthorizedAccessException   Access to the path is denied      Using Thread Sleep 5000  after Directory Delete path  true  solves that problem  I absolutely agree that this is not safe  and I am not encouraging anyone to use it  I would love to here a better approach to solve this problem to improve my answer  Now I am just giving an idea why this exception may happen   class Program       private static int numFolders   10000      private static string rootDirectory    C   1        static void Main string   args                if  Directory Exists rootDirectory                         Directory Delete rootDirectory  true               Thread Sleep 5000                      Stopwatch sw   Stopwatch StartNew            CreateFolder            long time   sw ElapsedMilliseconds           Console WriteLine time           Console ReadLine               private static void CreateFolder                 var one   Directory CreateDirectory rootDirectory            for  int i   1  i  lt   numFolders  i                          one CreateSubdirectory i ToString

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I too faced the same problem when trying to do this after deployment at server   dirPath   Server MapPath           website      strUserName  if   Directory Exists dirPath         DirectoryInfo DI   Directory CreateDirectory dirPath     string filePath   Server MapPath           Website  default aspx   File Copy filePath  dirPath      default aspx   true   File SetAttributes dirPath      default aspx   FileAttributes Normal     I granted permission in IIS to other group including administrator and my problem got solved

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To solve this problem  I follow the Scot Hanselman approach at Debugging System UnauthorizedAccessException  often followed by  Access to the path is denied  article  the code with example is bellow   class Program       static void Main string   args                var path    c   temp  notfound txt           try                       File Delete path                     catch  UnauthorizedAccessException                        FileAttributes attributes   File GetAttributes path               if   attributes  amp  FileAttributes ReadOnly     FileAttributes ReadOnly                                attributes  amp    FileAttributes ReadOnly                  File SetAttributes path  attributes                   File Delete path                             else                               throw

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For those trying to make a UWP  Universal Windows  application  file permissions are much more restricted  and in general is deny by default  It also supersedes the system user permissions  You will basically only have access to files in either   Your install location Your AppData location Files selected through the File or Folder picker Locations requested in your App Manifest   You can read more here for details    https   docs microsoft com en-us windows uwp files file-access-permissions

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In my case the problem was Norton  My in-house program doesn t have the proper digital signature and when it tried to delete a file it gave the UnauthorizedAccessException      If it give you a notification  you can handle it from there  In my case it didn t give a notification that I noticed  So here s how to keep Norton from blocking the program    Open Norton  Click the down arrow  Click History  Find activity by program  Click More Options  Click Exclude Process

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I have also faced this issue when my window service started throwing the exception  System UnauthorizedAccessException  Access to the path  C   Order  Media 44aa4857-3bac-4a18-a307-820450361662 mp4  is denied    So as a solution  I checked the user account associated with my service  as shown in below screen capture    So in my case it was NETWORK SERVICE  And then went to the folder properties to check if the associated user account also exists under their permission tab  It was missing in my case and when I added it and it fixed my issue   For more information please check the below screen capture

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In my case it was my AVG anti-virus that triggered the exception  I added my VS Projects directory to the  quot Allowed quot  list  And I had to add the executable to the AVG exceptions list after I copied the  exe to my App directory

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I was trying to use System IO File OpenWrite path   and it did not work because I was only passing OpenWrite   a path to a directory  but it requires a path all the way to the file you want to write  So a full path including the filename extension at the end needs to be passed into OpenWrite to avoid UnauthorizedAccessException

User · Answer

Right click on Visual studio and click  Run as Administrator

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If this is an IIS website that is having the problem  check the Identity property of the advanced settings for the application pool that the site or application uses  You may find that it is set to ApplicationPoolIdentity  and in that case then this is the user that will have to have access to the path   Or you can go old style and simply set the Identity to Network Service  and give the Network Service user access to the path

[c#] Why is access to the path denied?

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