In the start-up code (ie no request) of my ASP.NET application I need to get the path to the root of my app. I need this to open a file I have in a folder off the root directory.
How can I get this?
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4 Answers
Server.MapPath("~");
Will get you the root directory of the current application, as a path on the disk. E.g., C:\inetpub\...
Note that the ~ character can be used as part of web paths in ASP.NET controls as well, it'll fill in the URL to your application.
If your class doesn't have Server property, you can use static
HttpContext.Current.Server.MapPath("~")
HttpRuntime.AppDomainAppPath is useful if you don't have a HttpContext available.
For example, a low-level library method to get a path relative to the current application, and it has to work whether it is a web app or not:
private static string GetDataFilePath() => HttpRuntime.AppDomainAppVirtualPath != null ?
Path.Combine(HttpRuntime.AppDomainAppPath, "App_Data") :
Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
3 Comments
Sam
This is very useful when you cannot use HttpContext to get the Server object
Chris - Haddox Technologies
This method returned what I was looking for: The root URL of my application running in IIS. Server.MapPath returns a file directory.
dovid
for efficiency change it to a static variable:
private static string DataFilePath = HttpRuntime.AppDomainAppVirtualPath != null ? Path.Combine(HttpRuntime.AppDomainAppPath, "App_Data") : Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);Another possibility is AppDomain.CurrentDomain.BaseDirectory
Some additional ways: Different ways of getting Path
1 Comment
Brian B
FYI the "Different way of getting Path" link (dailydotnettips.com/2013/10/29/different-ways-of-getting-path) is broken.
You can get this from Server.MapPath method.
Here is the MSDN Link: http://msdn.microsoft.com/en-us/library/ms524632(v=vs.90).aspx
