NLog-仅在调试时记录 [英] NLog - Only log while debugging

问题描述

进行以下简单的NLog示例配置:

Take this simple NLog example configuration:

<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

    <targets>
        <target name="logfile" xsi:type="File" fileName="file.txt" />
    </targets>

    <rules>
        <logger name="*" minlevel="Debug" writeTo="logfile" />
    </rules>
</nlog>

如何将其设置为仅在调试时记录日志，而不是在生产环境中运行时记录日志?

How can this be set up to only log while debugging, and not when run in production?

使事情更具挑战性:我的NLog配置文件是集中的，并在所有应用程序/服务/站点上共享.因此，我想避免更改每个项目，而只需修改配置文件.

To make things a bit more challenging: My NLog configuration files are centralized, shared over all applications/services/sites. So I would like to avoid altering every single project and just modify the config files.

推荐答案

我在这里看到了三种解决方案.

I see three solutions here.

1)使用配置文件及其转换.目前，Web应用程序支持转换(我在谈论VS2012).对于桌面应用程序，您需要安装其他扩展名.

1) Using config file and its transformations. For the moment the transformations are supported for web applications (Im talking about VS2012). For desktop app you need to install additional extension.

2)使用两个目标，一个用于开发(我假设您是debug = development)，第二个用于生产.在运行时，您需要通过删除另一个来保留实际的一个.

2) Use two targets, one for development (I assume debugging=development in your case) and the second for production. At runtime you need to leave actual one by removing the other.

更新

3)如果您不想更改项目，则可以应用自定义条件到记录器，具体取决于自定义布局渲染器(请参见如何制作自定义布局渲染器的示例).在您的情况下，布局渲染器应返回正在执行的程序集的当前Build Configuration(调试或发布).结果，条件将如下所示:

3) If you don't want to alter the projects it is possible to apply custom conditions to the logger depending on custom Layout Renderer (see example of how to make a custom layout renderer). In your case the layout renderer should return current Build Configuration (Debug or Release) of executing assembly. As a result the condition will look like this:

<rules>
    <logger name="*" writeTo="logfile">
        <filters>
            <when condition="equals('${buildConfiguration}','Release')" action="Ignore" />
        </filters>
    </logger>
</rules>

其中 $ {buildConfiguration} 是您的自定义布局渲染器.

where ${buildConfiguration} is your custom layout renderer.

PS 而且不要忘记放这个

<extensions>
    <add assembly="NameOfMyAssemblyThatContainsMyLayoutRenderer" />
</extensions>

到nlog.config，以便NLog知道布局渲染器.

to the nlog.config so NLog knows about the layout renderer.

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