txt文件操作 读取

 /// <summary>
        /// 得到日志中所有文件 列表  采用utf8格式记录
        /// </summary>
        /// <param name="_LogName">日志文件名称</param>
        /// <param name="_LogMsg">文字说明</param>
        private Hashtable ExistsErrorile(string _LogName)
        {
            string locks = "";
            Hashtable ht = new Hashtable();
            lock (locks)
            {
                //保存文件名
                if (File.Exists(Application.StartupPath + _LogName))
                {
                    StreamReader objReader = new StreamReader(Application.StartupPath + _LogName);
                    string sLine = "";
                    ArrayList arrText = new ArrayList();
                    while (sLine != null)
                    {
                        sLine = objReader.ReadLine();
                        if (sLine != null)
                        {
                            if (ht.ContainsKey(sLine.Trim().Split('|')[0].ToString()))
                            {}
                            else
                            {
                                ht.Add(sLine.Trim().Split('|')[0].ToString(), sLine.Trim().Split('|')[1].ToString());
                            }
                        }
                    }
                    objReader.Close();
                    objReader.Dispose();
                }
                return ht;
            }
        }