带过滤的C＃异常监视器

Question

我在C＃中发现了一些关于异常过滤的question。我想为它写一些模拟。我不知道它对人有什么帮助，我也没有使用VB过滤。当然，这不是优化和生产准备，但工作和做必须做的事情（我怎么理解这个问题）。所以工作草图：

using System; 


namespace ExceptionFiltering 
{ 
    class ExceptionMonitor 
    { 
     Action m_action = null; 

     public ExceptionMonitor(Action action) 
     { 
      this.m_action = action; 
     } 

     public void TryWhere(Func<Exception, bool> filter) 
     { 
      try 
      { 
       this.m_action(); 
      } 
      catch (Exception ex) 
      { 
       if (filter(ex) == false) 
       { 
        throw; 
       } 
      } 
     } 

     public static void TryWhere(Action action, Func<Exception, bool> filter) 
     { 
      try 
      { 
       action(); 
      } 
      catch (Exception ex) 
      { 
       if (filter(ex) == false) 
       { 
        throw; 
       } 
      } 
     } 
    } 

    class Program 
    { 
     //Simple filter template1 
     static Func<Exception, bool> m_defaultExceptionFilter = ex => 
     { 
      if (ex.GetType() == typeof(System.Exception)) 
      { 
       return true; 
      } 

      return false; 
     }; 

     //Simple filter template2 
     static Func<Exception, bool> m_notImplementedExceptionFilter = ex => 
     { 
      if (ex.GetType() == typeof(System.NotImplementedException)) 
      { 
       return true; 
      } 

      return false; 
     }; 


     static void Main(string[] args) 
     { 
      //Create exception monitor 
      ExceptionMonitor exMonitor = new ExceptionMonitor(() => 
      { 
       //Body of try catch block 
       throw new Exception(); 
      }); 

      //Call try catch body 
      exMonitor.TryWhere(m_defaultExceptionFilter); 


      //Call try catch body using static method 
      ExceptionMonitor.TryWhere(() => 
      { 
       //Body of try catch block 
       throw new System.NotImplementedException(); 

      }, m_notImplementedExceptionFilter); 


      //Can be syntax like ExceptionMonitor.Try(action).Where(filter) 

      //Can be made with array of filters 
     } 
    } 
} 

待办事项：全局异常处理程序，支持多个过滤器等;

谢谢你的任何建议，更正和优化！

Answer 1

对不起，我是C＃的新手，所以我无法理解你的代码，但我仍然希望我的建议能够提供帮助。

if (somecondition) 
{ 
    return true; 
} 
else 
{ 
    return false; 
} 

可以简单：

return somecondition; 

而且你需要检查空调用之前Action：

if (m_action!=null) m_action();