上位机学习日记系统运行日志功能的编写与日志查看功能

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学习记录(5)系统运行日志功能的编写与日志查看功能

(一)系统运行日志功能的编写

需要组件:imagelist 与listview

第一步,添加listview 与 imagelist 控件。

  1. 编辑listview 的列成员:

  1. 修改listview的属性,绑定imagelist,设置视图属性

  1. 隐藏表头属性

  1. 在imagelist添加图片,并且按照以下顺序进行整理

第二步,编写消息方法

        /// <summary>
        /// 日志方法
        /// </summary>
        /// <param name="index">消息等级 0提示 1警告 2错误</param>
        /// <param name="log">字符串</param>
        private void AddLog(int index, string log)
        
            if (this.lstInfo.InvokeRequired)
            
                Invoke(new Action(() =>
                
                    ListViewItem lst = new ListViewItem("   " + CurrentTime, index);
                    lst.SubItems.Add(log);
                    lstInfo.Items.Insert(0, lst);
                ));
            
            else
            
                ListViewItem lst = new ListViewItem("   " + CurrentTime, index);
                lst.SubItems.Add(log);
                lstInfo.Items.Insert(0, lst);
            
        
        #endregion
        
            
        /// <summary>
        /// 当前系统时间
        /// </summary>
        private string CurrentTime
        
            get  return DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"); 

        

第三步,存入数据库中(可选)。

    public static class MySQLHelper
    

        private static string ConStr = ConfigurationManager.ConnectionStrings["ConStr"].ToString();

        /// <summary>
        /// 执行增删改
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static int Update(string sql)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                return cmd.ExecuteNonQuery();
            
            catch (Exception ex)
            
                throw ex;
            
            finally
            
                DBConnection.Close();
            
        
        /// <summary>
        /// 获取单一结果
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static object GetSingleResult(string sql)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                return cmd.ExecuteScalar();
            
            catch (Exception ex)
            

                throw ex;
            
            finally
            
                DBConnection.Close();
            
        
        /// <summary>
        /// 返回结果集
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static MySqlDataReader GetReader(string sql)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                return cmd.ExecuteReader(CommandBehavior.CloseConnection);
            
            catch (Exception ex)
            
                DBConnection.Close();
                throw ex;
            


        
        /// <summary>
        /// 返回数据集
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static DataSet GetDataSet(string sql)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            MySqlDataAdapter da = new MySqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            try
            
                DBConnection.Open();
                da.Fill(ds);
                return ds;
            
            catch (Exception ex)
            

                throw ex;
            
            finally
            
                DBConnection.Close();
            
        


        #region 启用事务执行多条SQL语句
        /// <summary>
        /// 启用事务执行多条SQL语句
        /// </summary>
        /// <param name="sqlList"></param>
        /// <returns></returns>
        public static bool UpdateByTran(List<string> sqlList)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand();
            cmd.Connection = DBConnection;
            try
            
                DBConnection.Open();
                cmd.Transaction = DBConnection.BeginTransaction();//开启事务
                foreach (string itemsql in sqlList)
                
                    cmd.CommandText = itemsql;
                    cmd.ExecuteNonQuery();
                
                cmd.Transaction.Commit();//提交事务
                return true;
            
            catch (Exception ex)
            
                if (cmd.Transaction != null)
                    cmd.Transaction.Rollback();//回滚事务
                throw new Exception("调用事务方法时出现错误:" + ex.Message);
            
            finally
            
                if (cmd.Transaction != null)
                    cmd.Transaction = null;//清空事务
                DBConnection.Close();

            
        
        #endregion

        #region 错误信息写入日志
        /// <summary>
        /// 将错误信息写入日志文件
        /// </summary>
        /// <param name="msg"></param>
        private static void WriteLog(string msg)
        
            FileStream fs = new FileStream("Log.text", FileMode.Append);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine("[0]  错误信息:1", DateTime.Now.ToString(), msg);
            sw.Close();
            fs.Close();
        
        #endregion

        #region 执行带参数的SQL语句
        /// <summary>
        /// 执行增删改
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static int Update(string sql, MySqlParameter[] param)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                cmd.Parameters.AddRange(param);//添加参数
                return cmd.ExecuteNonQuery();
            
            catch (Exception ex)
            
                WriteLog("执行Update(string sql)方法发生错误,错误日志:" + ex.Message);
                throw;
            
            finally
            
                DBConnection.Close();
            
        
        /// <summary>
        /// 返回单一结果
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static object GetSingleResult(string sql, SqlParameter[] param)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                cmd.Parameters.AddRange(param);//添加参数
                return cmd.ExecuteScalar();
            
            catch (Exception ex)
            
                WriteLog("执行GetSingleResult(string sql)方法发生错误,错误日志:" + ex.Message);
                throw;
            
            finally
            
                DBConnection.Close();
            
        
        /// <summary>
        /// 返回数据集
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        public static MySqlDataReader GetReader(string sql, SqlParameter[] param)
        
            MySqlConnection DBConnection = new MySqlConnection(ConStr);
            MySqlCommand cmd = new MySqlCommand(sql, DBConnection);
            try
            
                DBConnection.Open();
                cmd.Parameters.AddRange(param);
                return cmd.ExecuteReader(CommandBehavior.CloseConnection);
            
            catch (Exception ex)
            
                WriteLog("执行GetReader(string sql)方法发生错误,错误日志:" + ex.Message);
                DBConnection.Close();
                throw ex;
            

        
        #endregion

        #region 写入日志
        public static void Log(string info, int type, string user)
        
            string sql = "Insert into SysLog(LogTime,LogInfo,User,LogType) values(\'0\',\'1\',\'2\',3)";

            sql = string.Format(sql, DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), info, user, type);

            MySQLHelper.Update(sql);
        
        #endregion

        #region 增加产量

        public static void AddProduct(string LotNum, int State, string user)
        

            string sql = "Insert into Product(ProductDateTime,LotNum,Result,Operator) values(\'0\',\'1\',2,\'3\')";

            sql = string.Format(sql, DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss"), LotNum, State, user);

            MySQLHelper.Update(sql);
        

        #endregion
    

例子

MySQLHelper.Log("登录系统", 0, CommonMethods.objAdmin.LoginName);

(二)查看系统运行日志

功能样式如下:

页面上是加入了SplitContainer控件。其中左边是一个DataGridView控件,dock设置了fill。右边的日期和时间控件都是DateTimePicker。区别是CustomFormat属性设置的不同

其中DataGridView控件的列绑定了sql数据表的列信息

最后一列需要填充剩余空间。

查询功能语句:

        
		private void FrmSysLog_Load(object sender, EventArgs e)
        
            this.cmb_AlarmType.DataSource = new string[]  "日志信息", "报警信息", "全部信息" ;
            this.cmb_AlarmType.SelectedIndex = 2;

            this.dgv_Log.AutoGenerateColumns = false;
        


        /// <summary>
        /// 信息查询
        /// </summary>
        /// <param name="start"></param>
        /// <param name="end"></param>
        /// <param name="type"></param>
        private void QueryProcess(string start, string end, int type)
        
            //对开始时间和结束时间做判断

            DateTime t_start = Convert.ToDateTime(start);

            DateTime t_end = Convert.ToDateTime(end);

            if (t_start >= t_end)
            
                MessageBox.Show("开始时间必须小于结束时间", "查询提示");
                return;
            

            //SQL语句拼接

            StringBuilder sb = new StringBuilder();

            sb.Append("select * from SysLog where LogTime between \'0\' and \'1\'");

            string sql = string.Format(sb.ToString(), start, end);

            if (type <= 1)
            

                sql += " and LogType=" + type;
            

            DataSet ds = MySQLHelper.GetDataSet(sql);

            if (ds != null && ds.Tables.Count > 0)
            
                DataTable dt = ds.Tables[0];

                if (dt.Rows.Count > 0)
                
					/// 先清空,再绑定
                    this.dgv_Log.DataSource = null;                
                    this.dgv_Log.DataSource = dt;
                
                else
                
                    MessageBox.Show("未查询到数据,请检查!", "查询提示");
                
            
            else
            
                MessageBox.Show("查询有误,请检查!", "查询提示");
            
        

数据查询表格美化:

  1. 添加行号(通过gdi绘制的方法):

    调用事件

    /// <summary>
    /// 添加行号
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void dgv_Log_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
    
        DgvRowPostPaint(this.dgv_Log, e);
    

    private void DgvRowPostPaint(DataGridView dgv, DataGridViewRowPostPaintEventArgs e)
    
        try
        
            //添加行号 
            SolidBrush v_SolidBrush = new SolidBrush(dgv.RowHeadersDefaultCellStyle.ForeColor);
            int v_LineNo = 0;
            v_LineNo = e.RowIndex + 1;
            string v_Line = v_LineNo.ToString();
            e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
            e.Graphics.DrawString(v_Line, e.InheritedRowStyle.Font, v_SolidBrush, e.RowBounds.Location.X + 10, e.RowBounds.Location.Y + 8);
        
        catch (Exception ex)
        
            MessageBox.Show("添加行号时发生错误,错误信息:" + ex.Message, "操作失败");
        
    
  1. 修改消息列的显示(数据库中显示为数字,这里显示为汉字):

    private void dgv_Log_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
    
        if (e.RowIndex>=0)
        
            if (e.ColumnIndex==3)
            
                string result = string.Empty;
                switch (e.Value)
                
                    case 0:
                        result = "提示";
                        break;
                    case 1:
                        result = "警告";
                        break;
                    case 2:
                        result = "报警";
                        break;
                    default:
                        break;
                
                e.Value = result;
            
        
    

(三)打印功能与导出功能

演示如下:

打印功能调用代码案例

        /// <summary>
        /// 打印功能
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_Print_Click(object sender, EventArgs e)
        
            PrintDGV.Print_DataGridView(this.dgv_Log);
        

导出功能 调用函数如下:

        /// <summary>
        /// 导出功能
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_Export_Click(object sender, EventArgs e)
        
            SaveFileDialog sfd = new SaveFileDialog();

            sfd.Filter="XLS文件(*.xls)|*.xls|所有文件|*.*";

            sfd.FileName = "日志导出";

            sfd.DefaultExt = "xls";

            sfd.AddExtension = true;

            if (sfd.ShowDialog() == DialogResult.OK)
            
                if (NiceExcelSaveAndRead.SaveToExcelNew(sfd.FileName, this.dgv_Log))
                
                    MessageBox.Show("报表导出成功!", "报表导出");

                
                else
                
                    MessageBox.Show("报表导出失败!", "报表导出");
                
            

        

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