How do I resolve a path relative to an ASP NET MVC 4 application root

Question

How do I resolve paths relative to an ASP NET MVC 4 application s root directory  That is  I want to open files belonging to the application from controller actions  referenced like   Data data html  These paths are typically specified in Web config   EDIT   By  resolve  I mean to transform a path relative to the application s root directory to an absolute path   e g    Data data html  rarr  C  App Data Data html

User · Answer

In the action you can call   this Request PhysicalPath   that returns the physical path in reference to the current controller  If you only need the root path call   this Request PhysicalApplicationPath

User · Answer

To get the absolute path use this   String path   HttpContext Current Server MapPath    Data data html      EDIT    To get the Controller s Context remove  Current from the above line  By using HttpContext by itself it s easier to Test because it s based on the Controller s Context therefore more localized   I realize now that I dislike how Server MapPath works  internally eventually calls HostingEnvironment MapPath  So I now recommend to always use HostingEnvironment MapPath because its static and not dependent on the context unless of course you want that

User · Answer

Just use the following  Server MapPath    Data data html

User · Answer

I find this code useful when I need a path outside of a controller  such as when I m initializing components in Global asax cs   HostingEnvironment MapPath    Data data html

User · Answer

In your controller use   var path   HttpContext Server MapPath    Data data html      This allows you to test the controller with Moq like so   var queryString   new NameValueCollection    var mockRequest   new Mock lt HttpRequestBase gt     mockRequest Setup r   gt  r QueryString  Returns queryString   var mockHttpContext   new Mock lt HttpContextBase gt     mockHttpContext Setup c   gt  c Request  Returns mockRequest Object   var server   new Mock lt HttpServerUtilityBase gt     server Setup m   gt  m MapPath    Data data html    Returns  path to test data    mockHttpContext Setup m   gt  m Server  Returns server Object   var mockControllerContext   new Mock lt ControllerContext gt     mockControllerContext Setup c   gt  c HttpContext  Returns mockHttpContext Object   var controller   new MyTestController    controller ControllerContext   mockControllerContext Object

[c#] How do I resolve a path relative to an ASP.NET MVC 4 application root?

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