C#路径问题

Question

我有这个文件:C:\Documents and Settings\extryasam\My Documents\Visual Studio 2010\Projects\FCR\WebApplication4\config\roles.txt 我想将它导入我的 C# 应用程序。如果我插入完整路径就没问题，但我想做一些类似于我们对网站所做的事情，那就是“\config\roles.txt”

但是对于下面的代码，这是行不通的。

这是我的代码:

    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(filePath);
                while ((line = file.ReadLine()) != null)
                {
                    role = line;
                }
            }
            finally
            {
                if (file != null)
                {
                    file.Close();
                }
            }
        } 

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

Answer 1

在 ASP.NET 中，您可以使用 ~/config/roles.txt - 结合 Server.MapPath()，您可以获得完整路径。

[...] 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)

所以你可以尝试以下方法:

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