Take the file path opened by the process name in C#

Question

I have an application that works based on the client’s current process. I need to get the name of the file and its absolute path when opened. That is to say:

If for example the client opens the "test.txt" file, I need to get the path "c: project test.txt" instead of "c: windows system32 Notepad.exe". The same goes for . DOC, . XLS, etc...

The code snippet below returns the process-related information, which includes the software path (... Notepad.exe).

[DllImport("user32.dll", EntryPoint = "GetForegroundWindow", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
public static extern int GetForegroundWindow();

[...]

public static string GetFilePathName()
{
    uint procId = 0;
    int hWnd = GetForegroundWindow();
    GetWindowThreadProcessId(hWnd, out procId);
    var proc = Process.GetProcessById((int)procId);
}

Through the Process class it is possible to acquire the file path that is being worked?

Answer 1

Through the Process class it is possible to acquire the file path that is being worked?

No. For this case, the approach needs to be another, using a . NET class called FileSystemWatcher. I have taken the example below:

m_starting_path.Text = "C:\\
watcher = new FileSystemWatcher();

//---------------------------------------------------------------
// Suponho que seja uma aplicação que tenha um botão
// Aqui ocorre o acionamento do FileSystemWatcher, que 
// funciona basicamente com eventos. 

private void MeuBotaoClick(object sender, System.EventArgs e)
{
    if (watcher.EnableRaisingEvents == true) {
        MessageBeep(100);
        return
    }

    watcher.Path         = m_starting_path.Text;
    watcher.Filter       = m_filter.Text;
    watcher.NotifyFilter = NotifyFilters.FileName |
                           NotifyFilters.Attributes |
                           NotifyFilters.LastAccess |
                           NotifyFilters.LastWrite |
                           NotifyFilters.Security |
                           NotifyFilters.Size;


    watcher.Changed += new FileSystemEventHandler(OnFileEvent);
    watcher.Created += new FileSystemEventHandler(OnFileEvent);
    watcher.Deleted += new FileSystemEventHandler(OnFileEvent);
    watcher.Renamed += new RenamedEventHandler(OnRenameEvent);
    watcher.IncludeSubdirectories = true;
    watcher.EnableRaisingEvents = true;
}

public void OnFileEvent(object source, FileSystemEventArgs fsea)
{
    // Aqui você verifica modificações no arquivo (source)
}

public void OnRenameEvent(Object source, RenamedEventArgs rea)
{
    // Aqui você verifica arquivos renomeados
}

To relate the process to the file, you can use one of the solutions proposed in this OS question.