使用XML文件记录操作日志，并从后往前读取操作日志并在richTextBox1控件中显示出来

        #region 获取本地程序操作记录日志

        /// <summary>

        /// 获取本地程序更新日志信息(由后往前读取)

        /// </summary>

        private void GetLoacalOPRecordLogInfo()

        {

            XmlDocument xmlDocGet = new XmlDocument();

            xmlDocGet.Load(Application.StartupPath + @"\Log.xml");

            XmlNodeList xnl = xmlDocGet.SelectNodes("/Log/LogEvent");

            if (xnl != null)

            {

                for (int i = xnl.Count; i >= 0; i--)

                {

                    XmlNode ChNode = (XmlNode)xnl[i];

                    if (ChNode != null)

                    {

                        if (ChNode.Name == "LogEvent")

                        {

                            foreach (XmlNode ChNodeChild in ChNode.ChildNodes)

                            {

                                switch (ChNodeChild.Name.Trim())

                                {

                                    case "Date":

                                        Logdate = ChNodeChild.InnerText.Trim();   //更新日期

                                        break;

                                    case "Contact1":

                                        logContact1 = ChNodeChild.InnerText.Trim();

                                        break;

                                    case "Contact2":

                                        logContact2 = ChNodeChild.InnerText.Trim();

                                        break;

                                    default:

                                        break;

                                }

                            }

                        }

                        //此处添加内容到文本控件

                        richTextBox1.AppendText("查询日期:" + Logdate.Trim() + Environment.NewLine);

                        richTextBox1.AppendText("查询结果:" + Environment.NewLine);

                        richTextBox1.AppendText("      " + logContact1.ToString().Trim() + Environment.NewLine);

                        richTextBox1.AppendText("邮件发送:" + Environment.NewLine);

                        richTextBox1.AppendText("      " + logContact2.ToString().Trim() + Environment.NewLine);

                        richTextBox1.AppendText("" + Environment.NewLine);

                        richTextBox1.AppendText("************************************************************" + Environment.NewLine);

                    }

                }

            }

        }

        #endregion