How to get current directory path in C#. RRS feed

  • Question

  • Scenario :
    I've created a library project which provides interface to installer(exe created using install shield).I want to check whether a particular file exists in the installer folder.

    I've tried following :

    1). Assembly.GetEntryAssembly().Location
    // Throws "Object reference not set to an instance of an object"

    2). new Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath
    // return : C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll

    3). Assembly.GetExecutingAssembly().Location
    // returns empty string

    Could anyone tell me how can I get directory path from where the installer is being executed?

    Friday, September 14, 2018 5:40 AM

All replies

  • Try this:

    var currentDirectory = Path.GetDirectoryName(Assembly.GetCallingAssembly().Location);
    Friday, September 14, 2018 5:48 AM
  • Hi,
    Thank you for quick response.

    it throws following exception :
    The path is not of a legal form.
       at System.IO.Path.LegacyNormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
       at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths)
       at System.IO.Path.InternalGetDirectoryName(String path)
    Friday, September 14, 2018 6:02 AM
  • Hi, what is the result of Assembly.GetCallingAssembly().Location ? without Path.GetDirectoryName()

    There is also a method from System.IO


    Friday, September 14, 2018 6:12 AM
  • Hi,

    I've already tried Directory.GetCurrentDirectory(),
    it returns "
    C:\Windows\SysWOW64"even when installer folder is on desktop or any other drive.

    what is the result of Assembly.GetCallingAssembly().Location ? without Path.GetDirectoryName()
    I'll try it.


    Friday, September 14, 2018 6:43 AM
  • Hi,

    I just tried Assembly.GetCallingAssembly().Location, it returns empty string.


    Friday, September 14, 2018 6:51 AM
  • Maybe you can try other methods like :

    var currentDirectory = AppDomain.CurrentDomain.BaseDirectory;

    Friday, September 14, 2018 7:42 AM
  • So you have enhanced InstallShield (custom action) with your own library code?

    Take a look at the InstallShield doc in this case. You need to pass this as custom action data. Or you look at the MSI interop library.

    Friday, September 14, 2018 7:59 AM
  • Hi Stefan,

    Thank you for the response.

    I'm not exactly enhancing existing actions. I've just added a couple of form in installation process that uses my own library code as APIs for getting necessary values.

    What I wanted to do was instead of passing installer execution path from installer I wanted my library to handle it, but now I feel it's impossible.

    I'll take a look at the link you provided in order to understand how install shield works.

    Thank you.

    Friday, September 14, 2018 8:15 AM
  • Hi VishwasTrivedi,

    It seems that you could save the installation path into registry then you could retrieve the path from registry. 

    Best regards,


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    Monday, September 17, 2018 5:18 AM