我怎样才能避免重复的try catch块 [英] How can I avoid duplicated try catch blocks

问题描述

我有几种方法是这样的：

I have several methods that look like this:

public void foo()
{
   try 
   {
      doSomething();
   }
   catch(Exception e)
   {
      Log.Error(e);
   }
 }

我可以更改code到什么样子的？

Can I change the code to look like?

[LogException()]
public void foo()
{   
   doSomething();
}

我怎样才能实现这个自定义属性？什么是这样做的利弊？

How can I implement this custom attribute? and what are the pros and cons of doing it?

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我能实现我自己，我的意思是只写一个类，或者我需要使用postsharp或其他解决方案？

Can I implemented it myself, I mean just write one class, or do I need to use postsharp or another solution?

推荐答案

您可以使用委托和lambda表达式：

You can use delegates and lambdas:

private void ExecuteWithLogging(Action action) {
    try {
        action();
    } catch (Exception e) {
        Log.Error(e);
    }
}

public void fooSimple() {
    ExecuteWithLogging(doSomething);
}

public void fooParameter(int myParameter) {
    ExecuteWithLogging(() => doSomethingElse(myParameter));
}

public void fooComplex(int myParameter) {
    ExecuteWithLogging(() => {
        doSomething();
        doSomethingElse(myParameter);
    });
}

在事实上，你可以重命名 ExecuteWithLogging 来像 ExecuteWebserviceMethod 并添加其他常用的东西，如检查凭据，打开和关闭数据库连接等。

In fact, you could rename ExecuteWithLogging to something like ExecuteWebserviceMethod and add other commonly used stuff, such as checking credentials, opening and closing a database connection, etc.

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