How to save last folder in openFileDialog?

Question

How do I make my application store the last path opened in openFileDialog and after new opening restore it?

OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
    acc_path = openFileDialog1.FileName;
    Settings.Default.acc_path = acc_path;

    foreach (string s in File.ReadAllLines(openFileDialog1.FileName))
    {
        accs.Enqueue(s);
    }
    label2.Text = accs.Count.ToString();
}

Answer 1

I know this is a bit of an old thread, but I was not able to find a solution I liked to this same question so I developed my own. I did this in WPF but it should work almost the same in Winforms.

Essentially, I use an app.config file to store my programs last path.

When my program starts I read the config file and save to a global variable. Below is a class and function I call when my program starts.

public static class Statics
{
    public static string CurrentBrowsePath { get; set; }

    public static void initialization()
    {
        ConfigurationManager.RefreshSection("appSettings");
        Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

        CurrentBrowsePath = ConfigurationManager.AppSettings["lastfolder"];
    }
}

Next I have a button that opens the file browse dialog and sets the InitialDirectory property to what was stored in the config file. Hope this helps any one googling.

    private void browse_Click(object sender, RoutedEventArgs e)
    {
        OpenFileDialog open_files_dialog = new OpenFileDialog();
        open_files_dialog.Multiselect = true;
        open_files_dialog.Filter = "Image files|*.jpg;*.jpeg;*.png";
        open_files_dialog.InitialDirectory = Statics.CurrentBrowsePath;

        try
        {
            bool? dialog_result = open_files_dialog.ShowDialog();

            if (dialog_result.HasValue && dialog_result.Value)
            {
                string[] Selected_Files = open_files_dialog.FileNames;

                if (Selected_Files.Length > 0)
                {
                    ConfigWriter.Update("lastfolder", System.IO.Path.GetDirectoryName(Selected_Files[0]));
                }

                // Place code here to do what you want to do with the selected files.
            }
        }
        catch (Exception Ex)
        {
            MessageBox.Show("File Browse Error: " + Environment.NewLine + Convert.ToString(Ex));
        }
    }