C getting the path of AppData

Question

C  2008 SP1  I am using the code below   dt ReadXml   AppData   DateLinks xml      However  I am getting an exception that points to the location of where my application is running from      Could not find a part of the path    D  Projects SubVersionProjects CatDialer bin Debug  AppData  DateLinks xml     I thought the  AppData  should find the relative path  When I go Start Run  AppData  windows explorer takes me to that directory   I can not put the full path in  as the user is different on each client machine

User · Answer

The BEST way to use the AppData directory  IS to use Environment ExpandEnvironmentVariable method  Reasons   it replaces parts of your string with valid directories or whatever it is case-insensitive it is easy and uncomplicated it is a standard good for dealing with user input  Examples  string path  path     quot  AppData  stuff quot   path     quot  aPpdAtA  HelloWorld quot   path     quot  progRAMfiLES  Adobe  appdata  FileZilla quot      collection of paths  path   Environment ExpandEnvironmentVariables path   Console WriteLine path    More info   ALLUSERSPROFILE    C  ProgramData  APPDATA    C  Users Username AppData Roaming  COMMONPROGRAMFILES     C  Program Files Common Files  COMMONPROGRAMFILES x86     C  Program Files  x86  Common Files  COMSPEC    C  Windows System32 cmd exe  HOMEDRIVE  C   HOMEPATH   C  Users Username  LOCALAPPDATA   C  Users Username AppData Local  PROGRAMDATA    C  ProgramData  PROGRAMFILES   C  Program Files  PROGRAMFILES X86   C  Program Files  x86   only in 64-bit version   PUBLIC     C  Users Public  SystemDrive    C   SystemRoot     C  Windows  TEMP  and  TMP     C  Users Username AppData Local Temp  USERPROFILE    C  Users Username  WINDIR     C  Windows

User · Answer

I don t think putting  AppData  in a string like that will work   try  Environment GetFolderPath Environment SpecialFolder ApplicationData  ToString

User · Answer

In  net2 0 you can use the variable Application UserAppDataPath

User · Answer

You can also use  Environment ExpandEnvironmentVariables   AppData   DateLinks xml      to expand the  AppData  variable

User · Answer

For ASP NET  the Load User Profile setting needs to be set on the app pool but that s not enough  There is a hidden setting named setProfileEnvironment in  Windows System32 inetsrv Config applicationHost config  which for some reason is turned off by default  instead of on as described in the documentation  You can either change the default or set it on your app pool  All the methods on the Environment class will then return proper values

User · Answer

To get the AppData directory  it s best to use the GetFolderPath method   Environment GetFolderPath Environment SpecialFolder ApplicationData     must add using System if not present     AppData  is an environment variable  and they are not automatically expanded anywhere in  NET  although you can explicitly use the Environment ExpandEnvironmentVariable method to do so  I would still strongly suggest that you use GetFolderPath however  because as Johannes R  ssel points out in the comment   AppData  may not be set in certain circumstances   Finally  to create the path as shown in your example   var fileName   Path Combine Environment GetFolderPath      Environment SpecialFolder ApplicationData    DateLinks xml

User · Answer

AppData   Local aka  C  Users  lt user gt  AppData Local   Environment GetFolderPath Environment SpecialFolder LocalApplicationData    AppData   Roaming aka  C  Users  lt user gt  AppData Roaming   Environment GetFolderPath Environment SpecialFolder ApplicationData    Additionally  it could be handy to know   Environment SpecialFolder ProgramFiles    - for Program files X64 folder Environment SpecialFolder ProgramFilesX86 - for Program files X86 folder  For the full list check here

User · Answer

Just wanted to share another way of accessing  App Data  folder in my mvc application in case that someone needs this    Path Combine HttpRuntime AppDomainAppPath  App Data

User · Answer

This is working for me in a console application -   string appData   System Environment GetEnvironmentVariable  APPDATA

User · Answer

The path is different if you re talking ASP NET   I couldn t find any of the  SpecialFolder  values that pointed to  App Data for ASP NET   Instead you need to do this    HttpContext Current ApplicationInstance Server MapPath    App Data        Note  You don t need the  Current  property in an MVC Controller   If theres another more  abstract  way to get to App Data would love to hear how

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