blocks|key|1775260|text|ELMAH专门用于web应用程序，而log4net则同时用于web应用程序和Windows应用程序。在web应用程序中，ELMAH比log4net有更多的优势。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1775261|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

ELMAH is specially used for web applications while log4net is used on both web and Windows applications. ELMAH has many more advantages than log4net in a web application.

blocks|key|1775304|text|ELMAH非常强大，但它的功能也非常具体。它为你做了很多工作，而我相信Log4Net需要你来做错误处理和日志记录。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1775305|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

ELMAH is very powerful, but also very specific in what it does. It does a lot of the work for you, while I believe Log4Net requires you to do the error handling and logging.

blocks|key|1989159|text|ELMAH用于跟踪web应用程序的错误和异常，并允许您通过许多不同的机制(SQL、RSS、Twitter、文件、电子邮件等)轻松地记录或查看这些异常。如果你没有内置的异常处理，ELMAH很可能会在web应用程序环境中得到你想要的异常处理。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1989160|Log4net也可以用于异常日志记录，但是您可能需要使用自己的处理程序来插入您的web应用程序。如果您需要做其他类型的信息日志记录，Log4net将优于ELMAH，因为log4net是一个通用的日志记录框架。几乎在任何.NET应用程序中都可以使用Log4net。|1989161|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

ELMAH serves a purpose of tracking errors and exceptions for your web applications and allows you to easily log or view those exceptions via many different mechanisms (SQL, RSS, Twitter, files, email, etc.). If you have no built-in exception handling ELMAH will most likely get you what you are looking for in terms of exception handling in a web application environment.

Log4net can be used for exception logging as well, however you might need to roll your own handlers to plug into your web application. Log4net will shine over ELMAH if you need to do other types of information logging as log4net is a general purpose logging framework. Log4net can also be used in almost any .NET application.

blocks|key|1775436|text|关键区别在于，ELMAH记录未处理的应用程序异常；log4net记录您告诉它记录的任何内容。您可以将log4net配置为记录未处理的异常，但它捕获了大量开箱即用的有用信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1775437|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The key difference is that ELMAH logs unhandled application exceptions; log4net logs whatever you tell it to log. You can configure log4net to log unhandled exceptions, but ELMAH captures a wealth of useful information out of the box.

blocks|key|1775532|text|ELMAH的工作原理是创建一个HTTP模块，该模块挂钩到错误事件中，然后执行日志记录。这很容易被糟糕的设计所阻挠和破坏。Log4Net可能需要额外的前期工作，但如果您使用面向方面编程框架，并将其应用于您的类甚至整个程序集，那么您可以用很少的代码和精力实现更好的异常日志记录。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1775533|ELMAH只有在可以访问HttpContext的情况下才能工作，而这在WCF服务中很难实现。所以不管怎样，你最终会在WCF中使用其他的记录器。为什么不使用一种更通用的解决方案呢？|1775534|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

ELMAH works by creating an HTTP module that hooks into error events and then does logging. This can easily be thwarted and broken by bad design. Log4Net might require additional work upfront but if you use an AOP framework and apply it across your class or even the assembly, you can achieve far better exception logging with very little code and effort.

ELMAH only works if it has access to HttpContext which can be hard to achieve in WCF services. So you would end up using some other logger in WCF anyway. Why not just use one solution that is more universal.

Some people are using <a href="https://elmah.github.io/" rel="noreferrer">ELMAH</a> instead of log4net. What makes it better?

I found out about ELMAH in <a href="https://stackoverflow.com/questions/5057567/how-do-i-do-logging-in-c/5057621#5057621">an answer to Stack Overflow question How do I do logging in C#?</a>

What is the difference between log4net and ELMAH?

Windows

有些人正在使用而不是log4net。是什么让它变得更好？我在发现了ELMAH

问log4net和ELMAH有什么不同？
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