Microsoft Web API How do you do a Server MapPath

Question

Since Microsoft Web API isn t MVC  you cannot do something like this   var a   Request MapPath         nor this  var b   Server MapPath         because these are under the System Web namespace  not the System Web Http namespace    So how do you figure out the relative server path in Web API    I used to do something like this in MVC   var myFile   Request MapPath    Content pics     filename     Which would give me the absolute path on disk    C  inetpub wwwroot myWebFolder Content pics mypic jpg

User · Answer

Little bit late answering that but there we go  I could solve this using Environment CurrentDirectory

User · Answer

The selected answer did not work in my Web API application  I had to use   System Web HttpRuntime AppDomainAppPath

User · Answer

You can use HostingEnvironment MapPath in any context where System Web objects like HttpContext Current are not available  e g also from a static method    var mappedPath   System Web Hosting HostingEnvironment MapPath    SomePath      See also What is the difference between Server MapPath and HostingEnvironment MapPath

User · Answer

string root   HttpContext Current Server MapPath    App Data

User · Answer

You can try like   var path    Image test png       System Web Hosting HostingEnvironment MapPath      path

User · Answer

Since Server MapPath   does not exist within a Web Api  Soap or REST   you ll need to denote the local- relative to the web server s context- home directory   The easiest way to do so is with    string AppContext BaseDirectory   get     You can then use this to concatenate a path string to map the relative path to any file  NOTE  string paths are   and not   like they are in mvc   Ex     System IO File Exists      AppContext BaseDirectory       Content    pics     filename       returns true- positing that this is a sound path in your example

User · Answer

I can t tell from the context you supply  but if it s something you just need to do at app startup  you can still use Server MapPath in WebApiHttpApplication  e g  in Application Start     I m just answering your direct question  the already-mentioned HostingEnvironment MapPath   is probably the preferred solution

User · Answer

As an aside to those that stumble along across this  one nice way to run test level on using the HostingEnvironment call  is if accessing say a UNC share   example  that is mapped to   example  you could execute this to get around IIS-Express issues          if DEBUG     var fs   new FileStream     example file  FileMode Open  FileAccess Read    else     var fs   new FileStream HostingEnvironment MapPath    example file    FileMode Open  FileAccess Read    endif   I find that helpful in case you have rights to locally test on a file  but need the env mapping once in production

[asp.net-web-api] Microsoft Web API: How do you do a Server.MapPath?

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