Could not find a part of the path in c#

Question

I am trying to build a method which is able to write in a file the number of files in another folder. I already got it but it does not work because gives me an error:

Could not find a part of the path ' C:\Users\Administrator\Desktop...\bin\release\%USERPROFILE%\AppData\Local_logC'

This is my code:

private static int GetCountGFiles(string dirname)
{
    int fileCount = 0;
    dirname = dirname.TrimEnd(new char[] { '\\' }) + @"\";

    var fixedDirname = Environment.ExpandEnvironmentVariables(dirname);

    fileCount += System.IO.Directory.GetFiles(fixedDirname).Length;

    string[] all_subdirs = System.IO.Directory.GetDirectories(dirname);

    foreach (string dir in all_subdirs)
        fileCount += GetCountGFiles(dirname); 

    string data = string.Format("LogReg.txt");

    System.IO.Directory.CreateDirectory(filePath);
    var fileandpath = filePath + data;

    using (StreamWriter writer = File.AppendText(fileandpath))
    {
        writer.WriteLine("[" + DateTime.Now + "]" + " - " + "Nº de Records: (" + fileCount.ToString() + ")");
    }

    return fileCount;
}

And then I call the method like this :

GetCountGFiles(@"%USERPROFILE%\AppData\Local\Cargas - Amostras\_logsC\");

What should I do?

Answer 1

Methods like Directory.GetFiles and Directory.GetDirectories will not automatically figure out what the environment variables that you pass to it are. You need to do that manually with Environment.ExpandEnvironmentVariables. For example:

var fixedDirname = Environment.ExpandEnvironmentVariables(dirname);

Now you can do this:

fileCount += System.IO.Directory.GetFiles(fixedDirname).Length;

(PS No need to use ToString() on a string)