//获得当前文件夹下所有文件夹

            string path = "D://文件夹";

            string[] dirstr = Directory.GetDirectories(path);

            //获得当前文件夹下的文件

            string[] filestr = Directory.GetFiles(path);

            int count = ;

            for (int i = ; i < filestr.Length; i++)

            {

                string paths = filestr[i];

                StreamReader sr = new StreamReader(paths, Encoding.Default);

                String line;

                while ((line = sr.ReadLine()) != null)

                {

                    //Console.WriteLine(line.ToString());

                    bll.Insert(line);

                    count++;

                }

            }