如何读取子文件夹和文件中包含的内容

我可以使用BETALIB阅读器读取文件夹文件，但是通过在文件夹浏览器中给出路径可以读取大文件我可以读取文件夹但在该文件夹中有许多文件夹和文件我想要阅读子文件夹 .

例如： - E：\ EXE \ ttd \ ttd1 \ ttd2 \ bsem \ f1.dat E：\ EXE \ ttd \ ttd1 \ ttd2 \ MCDEX \ f1.dat

我想通过在folderbrowserdialog EX：E：\ EXE中给出路径来读取文件

如果我选择路径E：\ EXE它应该读取其中包含的所有子文件夹和文件 .

任何人都可以告诉我我应该在代码中改变什么

private void btnSourceBOMCX_Click(object sender, EventArgs e)
    {
        fbdSourceBOMCX.Description = "Please select BOMCX source folder";
        fbdSourceBOMCX.RootFolder = Environment.SpecialFolder.Desktop;
        if ((fbdSourceBOMCX.ShowDialog() != DialogResult.Cancel) || (fbdSourceBOMCX.SelectedPath != ""))
        {
            sourceBOMCX = fbdSourceBOMCX.SelectedPath;
            if (File.Exists(sourceBOMCX + "\\Master"))
            {
                txtSourceBOMCX.Text = fbdSourceBOMCX.SelectedPath;
                Interaction.SaveSetting ((new Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase()).Info.Title  , "RealTime Converter", "sourceBOMCX", fbdSourceBOMCX.SelectedPath); 
            }
            else
            {

            }


        }
    }

private void bgManual_DoWork（object sender，DoWorkEventArgs e）{

try
        {
            int DT = int.Parse(txtSelectedDate.Text);
            BETALIB.BLReader Reader = new BETALIB.BLReader();
            BETALIB.BLReader Reader1 = new BETALIB.BLReader();
            Reader.OpenDirectory(txtSourceBOBOMCX.Text);
            Reader.ReadMaster();
            string path = txtDestinationBOBOMCX.Text + "\\XYZ-" + txtSelectedDate.Text + ".txt";
            StreamWriter Strwriter = new StreamWriter(path);

            try
            {
                while (Reader.iMaRecordsLeft > 0)
                {
                    string SecName = Reader.sMaSecName;
                    string Symbol = Reader.sMaSecSymbol;
                    Symbol = prefix + Symbol;
                    int abc = 0;
                    int xyz = lbselectedBOBOMCX.Items.Count - 1;
                    while (abc <= xyz)
                    {
                        if (SecName == (string)lbselectedBOBOMCX.Items[abc])
                        {

                            Reader.OpenSecurityByName(Reader.sMaSecName);
                            Reader.SeekToEnd();
                            Reader.Seek(-1);
                            Reader.ReadDay();
                            float O = Reader.dSeOpen;
                            float H = Reader.dSeHigh;
                            float L = Reader.dSeLow;
                            float C = Reader.dSeClose;
                            double V = Reader.dSeVolume;
                            double OI = Reader.dSeOpenInterest;
                            string T = Reader.iSeTime.ToString();
                            string D = Reader.iSeDate.ToString();

                            label9.Text = SecName + "/";
                            if (int.Parse(D) == DT)
                            {
                                string a = string.Concat(SecName, ",", Symbol, ",", D, ",", T, ",", O, ",", H, ",", L, ",", C, ",", V, ",", OI);
                                if (SecName != "" && V != 0)
                                {
                                    Strwriter.WriteLine(a);
                                }

                            }
                        }
                        abc++;
                    }
                    Reader.ReadMaster();
                }

                Reader.CloseDirectory();
                Strwriter.Close();
                Strwriter.Dispose();
            }
            catch
            {
                Reader.CloseDirectory();
                Strwriter.Close();
                Strwriter.Dispose();
            }
        }
        catch
        {
        }

请帮我

提前致谢

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