C# Path Problem

I have this file: C:\Documents and Settings\extryasam\My Documents\Visual Studio 2010\Projects\FCR\WebApplication4\config\roles.txt and I want to import it into my C# application. If I insert the full path it's ok, but I want to do something similar to what we do with websites, and that is "\config\roles.txt"

However with the below code, this is not working.

This is my code:

    public string authenticate()
    {
        WindowsIdentity curIdentity = WindowsIdentity.GetCurrent();
        WindowsPrincipal myPrincipal = new WindowsPrincipal(curIdentity);

        //String role = "NT\\Internet Users";

        //string filePath = Server.MapPath("config/roles.txt");
        //string filePath = (@"~/WebApplication4/config/roles.txt");
        //string filePath = Path.GetDirectoryName(@"\config\roles.txt");
        string filePath = Path.GetPathRoot(@"/config/roles.txt");
        string line;
        string role = "";

        if (File.Exists(filePath))
        {
            StreamReader file = null;
            try
            {
                file = new StreamReader(f开发者_Go百科ilePath);
                while ((line = file.ReadLine()) != null)
                {
                    role = line;
                }
            }
            finally
            {
                if (file != null)
                {
                    file.Close();
                }
            }
        } 

        if (!myPrincipal.IsInRole(@role))
        {
            return "401.aspx";
        }
        else
        {
            return "#";
        }
    }

In ASP.NET, you can use ~/config/roles.txt - in combination with Server.MapPath(), you can get the full path.

[...] ASP.NET includes the Web application root operator (~), which you can use when specifying a path in server controls. ASP.NET resolves the ~ operator to the root of the current application. You can use the ~ operator in conjunction with folders to specify a path that is based on the current root. (see http://msdn.microsoft.com/en-us/library/ms178116.aspx)

So you could try the following:

string filePath = System.Web.HttpContext.Current.Server.MapPath("~/config/roles.txt");

You can use Server.MapPath to map the specified relative or virtual path to the corresponding physical directory on the server.

Since you are working locally you can use absolute path to that file and it's will works. But what about situation when web application that contains roles.txt file will be deployed on some web server and user will try to access this file from another machine? You can use the approach below to access file hosted on a web server from a Windows application:

using (var stream = new WebClient().OpenRead("your_web_application_root_url/configs/roles.txt"))
using (var reader = new StreamReader(stream))
{
    Console.WriteLine(reader.ReadToEnd());
}

Be warned that share security settings over network is not quite good idea.

You should select your file and press F4, and choose copy to output directory. Then you will be able to work with it

You could try embedding the file as a resource in your project. Something like this: How to embed a text file in a .NET assembly?