LogManager.configuration为null

Question

我已经使用nuget将NLog添加到项目中并添加了NLog.config.我正在运行调试器并得到一个NullReferenceException由于事实LogManager.Configuration是null:

LogManager.Configuration.AddTarget("sentinel", sentinalTarget);

这行代码在静态构造函数中运行.

• NLog.config位于web.config旁边的项目根目录中.
• 这发生在visual studio调试器中
• NLog.config属性"复制到输出目录"="始终复制"
• 我更新了NLog.config throwExceptions ="true",并且在运行时LogManager.ThrowExceptions是假的,所以我怀疑配置有问题
• 尝试删除名称为:viewer,DbWin及其相关规则的目标

NLog.config内容:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      autoReload="true"
      throwExceptions="false">

  <variable name="appName" value="YourAppName" />

  <targets async="true">
    <target xsi:type="File"
            name="default"
            layout="${longdate} - ${level:uppercase=true}: ${message}${onexception:${newline}EXCEPTION\: ${exception:format=ToString}}"
            fileName="${specialfolder:ApplicationData}\${appName}\Debug.log"
            keepFileOpen="false"
            archiveFileName="${specialfolder:ApplicationData}\${appName}\Debug_${shortdate}.{##}.log"
            archiveNumbering="Sequence"
            archiveEvery="Day"
            maxArchiveFiles="30"
            />

    <target xsi:type="EventLog"
            name="eventlog"
            source="${appName}"
            layout="${message}${newline}${exception:format=ToString}"/>

    <target xsi:type="NLogViewer"
            name="viewer"
            address="udp://127.0.0.1:9999"/>

    <target xsi:type="OutputDebugString" name="DbWin" layout="Log4JXmlEventLayout">
      <layout xsi:type="Log4JXmlEventLayout" />
    </target>
  </targets>
  <rules>
    <logger name="*" writeTo="default" minlevel="Info" />
    <logger name="*" writeTo="eventlog" minlevel="Error" />
    <logger name="*" minlevel="Debug" writeTo="viewer" />
    <logger name="*" minlevel="Trace" writeTo="DbWin" />
  </rules>
</nlog>

更新
我发现了源.仅在运行单元测试时才会出现此问题.运行完整的应用程序(Web应用程序)问题不存在.我将NLog.config文件复制到单元测试主目录.运行单元测试时仍然存在问题.

Answer 1

• 将NLog.config复制到Test projects顶级文件夹
• 添加DeploymentItemAttribute到测试类(更多信息)

像这样:

[TestClass]
[DeploymentItem("ProjectName\\NLog.config")]
public class GeneralTests

或者,您可以以编程方式加载配置:

LogManager.Configuration = new XmlLoggingConfiguration(@"c:\path\to\NLog.config")