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ASP.NET MVC自定义过滤属性实现log功能

  现在的企业级开发项目,特别是网站一般都会用到log功能,想想大部分会用Enterprise Logging Application Block 的功能 或者自己写一个组件,记录系统日志事件,更好的跟踪了解系统运行情况, 现用ASP.NET MVC 的过滤属性实现log功能!

  ASP.NET MVC的filter 是一个属性,可以应用到controller 后者action.当Controller或者action method 被调用时,ASP.NET MVC的filter在调用执行前后会被触发。 先看下当Control 里面的action 被调用时的利用继承,自定义类log的效果图:

  要实现上面的效果,现自定义一个类LogMessageAttribute,LogMessageAttribute继承接口IActionFilter ,IResultFilter,也可以选择性的继承重写类FilterAttribute。

  IActionFilter interface 定义为:

  public interface IActionFilter

  {

  // Methods

  void OnActionExecuted(ActionExecutedContext filterContext);

  void OnActionExecuting(ActionExecutingContext filterContext);

  }

  OnActionExecuting :在Controller 里面的action method 调用之前运行

  OnActionExecuted:在Controller 里面的action method 调用之后运行,但是在IResultFilter接口的OnResultExecuting方法执行之前

  IResultFilter interface定义为:

  public interface IResultFilter

  {

  // Methods

  void OnResultExecuted(ResultExecutedContext filterContext);

  void OnResultExecuting(ResultExecutingContext filterContext);

  }

  OnResultExecuting:在Controller 里面的action method调用处理玩前执行.

  OnResultExecuted:在Controller 里面的action method调用处理玩后执行.

  接下来是重头戏:LogMessageAttribute自定义类

  [AttributeUsage(AttributeTargets.Class |AttributeTargets.Method ,Inherited=true ,AllowMultiple=true )]

  public class LogMessageAttribute:FilterAttribute,IActionFilter,IResultFilter

  {

  /// <summary>

  /// <param name="LogName ">日志文件路径</para>

  /// </summary>

  public string LogName {

  get;

  set;

  }

  /// <summary>

  /// 记录时间,系统版本,当前线程ID 等记录

  /// </summary>

  /// <param name="controller"></param>

  /// <param name="action"></param>

  /// <param name="message"></param>

  public void LogMessage(string controller, string action, string message)

  {

  if (!string.IsNullOrEmpty(LogName))

  {

  TextWriter writer = new StreamWriter(LogName, true);

  writer.WriteLine("################# Begin #################");

  writer.WriteLine("Time:[{0}]",DateTime.Now.ToString("yyyy-MM-dd- hh:mm:ss"));

  writer.WriteLine("Controller:{0}",controller);

  writer.WriteLine("Action:{0}",action);

  writer.WriteLine("Message:{0}",message);

  writer.WriteLine("Operating System version is:{0}",System.Environment.OSVersion.Version.ToString());

  writer.WriteLine("Current Thread ID is:{0}",AppDomain.GetCurrentThreadId());

  writer.WriteLine("############### Over ###############");

  writer.Close();

  }

  }

  public void OnActionExecuting(ActionExecutingContext filterContext)

  {

  LogMessage(filterContext.RouteData.Values["controller"].ToString(),

  filterContext.RouteData.Values["action"].ToString(),

  "Action exeuting...");

  }

  public void OnActionExecuted(ActionExecutedContext filterContext)

  {

  LogMessage(filterContext.RouteData.Values["controller"].ToString(),

  filterContext.RouteData.Values["action"].ToString(),

  "Action executed.");

  }

  public void OnResultExecuting(ResultExecutingContext filterContext)

  {

  LogMessage(filterContext.RouteData.Values["controller"].ToString(),

  filterContext.RouteData.Values["action"].ToString(),

  "Result executing...");

  }

  public void OnResultExecuted(ResultExecutedContext filterContext)

  {

  LogMessage(filterContext.RouteData.Values["controller"].ToString(),

  filterContext.RouteData.Values["action"].ToString(),

  "Result executed");

  }

  }

  自定义好LogMessageAttribute类,应用到Controller或者action的属性。在Controller 正在执行,或者呈现一个View,一个HTTP请求数据时,就会在日志文件记录一些日志.

  在项目的Controller里面应用自定义的属性

  [Logging(LogName = @"D:\Project\Project\MVCProject\sky.ExtendMVCFramework\sky.ExtendMVCFramework\Log.log")]

  public ActionResult DesplayEmployee()

  {

  ViewData["Message"] = "Our employees welcome you to our site!";

  List<Employee> employees = new List<Employee>

  {

  new Employee

  {

  FirstName="sky",

  LastName="yang",

  Email = "[email protected]",

  Department ="Development"

  },

  new Employee {

  FirstName="sky",

  LastName="yang",

  Email = "[email protected]",

  Department ="Development"

  }

  };

  return View(employees);

  }

  运行程序,正如文章开始所看到的截图!

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