mvc中日誌的原理和使用步驟

標籤：技術分享   sqlserver   資料   ide   exce   system   base   value   art   

 

日誌原理 就是觀察者模式(訂閱發布模式) , 具體和委託很像 

 

使用步驟  在 log4net架構下

1.在Common中定義LogHelper入口類

1.定義LogHelper類namespace LTeasyOA.Common{public class LogHelper{public static Queue<string> ExceptionStringQueue = new Queue<string>();//日誌訊息佇列public static List<ILogWriter> LogWriterList = new List<ILogWriter>();//接受訂閱者的集合   提供入口public static void WriteLog(string exceptionText)   {lock (ExceptionStringQueue){ExceptionStringQueue.Enqueue(exceptionText);}}//靜態函數的調用時機，是在類被執行個體化或者靜態成員被調用的時候進行調用，//並且是由.net架構來調用靜態建構函式來初始化靜態成員變數。static LogHelper() //靜態建構函式  只要是調用該類的任何構造方法 或執行個體化 都會調用此構造方法來初始化和執行日誌函數{//LogWriterList.Add(new TextFileWrite());//LogWriterList.Add(new SqlServerWriter());LogWriterList.Add(new Log4NetWriter());  //添加訂閱者  和委託賦值原理一樣ThreadPool.QueueUserWorkItem(o => {lock (ExceptionStringQueue){string str = ExceptionStringQueue.Dequeue();//將異常資訊寫到記錄檔中去 但有可能是文字檔 也可能是資料庫檔案foreach (var ListItem in LogWriterList){ListItem.WriteLogInfo(str);}//控制項在這裡幫我們自動實現 有一個架構 Log4Net}});}}}

 

當然可以用多態

實現介面

namespace LTeasyOA.Common{public interface ILogWriter{void WriteLogInfo(string str);}}

 

子類實現

    public class Log4NetWriter:ILogWriter    {        public void WriteLogInfo(string str)        {            ILog logWriter = log4net.LogManager.GetLogger("Demo");            logWriter.Error(str);        }    }

 

 

static LogHelper中執行個體化

 

 

2.

 

定義一個繼承HandleErrorAttribute的子類 實現OnException()方法

namespace LTeasyOA.UI.Portal2.Models{    public class MyExceptionFilterAttribute:HandleErrorAttribute    {        public override void OnException(ExceptionContext filterContext)        {            //直接把錯誤寫到 日誌中去            base.OnException(filterContext);            Common.LogHelper.WriteLog(filterContext.Exception.ToString());        }    }}

filterConfig中添加過濾器

using LTeasyOA.UI.Portal2.Models;using System.Web;using System.Web.Mvc;namespace LTeasyOA.UI.Portal2{    public class FilterConfig    {        public static void RegisterGlobalFilters(GlobalFilterCollection filters)        {            //filters.Add(new HandleErrorAttribute());            filters.Add(new MyExceptionFilterAttribute());            //第一步            // 過濾器 目前三種  ActionFilter ResultFilter ExceptionFilter        }    }}

 

 web.config添加配置 兩步

1.塊配置

1 <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />2 <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>3 </configSections>

2.log4net節點配置

<log4net>    <!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->    <!-- Set root logger level to ERROR and its appenders -->    <root>      <level value="ERROR"/>      <appender-ref ref="SysAppender"/>    </root>    <!-- Print only messages of level DEBUG or above in the packages -->    <logger name="WebLogger">      <level value="DEBUG"/>    </logger>    <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" >      <param name="File" value="App_Data/" />      <param name="AppendToFile" value="true" />      <param name="RollingStyle" value="Date" />      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />      <param name="StaticLogFileName" value="false" />      <layout type="log4net.Layout.PatternLayout,log4net">        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />        <param name="日誌開始" value="&#13;&#10;----------------------header--------------------------&#13;&#10;" />        <param name="日誌結束" value="&#13;&#10;----------------------footer--------------------------&#13;&#10;" />      </layout>    </appender>    <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">      <layout type="log4net.Layout.PatternLayout,log4net">        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />      </layout>    </appender>  </log4net>

global中初始化

    public class MvcApplication : Spring.Web.Mvc.SpringMvcApplication    {        protected void Application_Start()        {            AreaRegistration.RegisterAllAreas();            WebApiConfig.Register(GlobalConfiguration.Configuration);            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);            RouteConfig.RegisterRoutes(RouteTable.Routes);            BundleConfig.RegisterBundles(BundleTable.Bundles);            //載入配置 初始化            log4net.Config.XmlConfigurator.Configure();        }    }

 

測試

 

大功告成!!!!!

 

mvc中日誌的原理和使用步驟