nlog richtextbox -找不到目标：'RichTextBox‘

Question

我已经做到了这一点，但是我尝试更新nlog并使用nuget包，包括NLog.Windows.Forms。

现在，除了内部例外，我还得到了NLog.NLogConfigurationException：

找不到目标：“RichTextBox”

该项目同时引用: NLog和NLog.Windows.Forms

来自packages.config：

  <package id="NLog" version="4.3.4" targetFramework="net46" />
  <package id="NLog.Config" version="4.3.4" targetFramework="net46" />
  <package id="NLog.Schema" version="4.3.4" targetFramework="net46" />
  <package id="NLog.Windows.Forms" version="4.2.3" targetFramework="net46" />

来自nlog.config

<target name="rtb" xsi:type="RichTextBox" controlName="RichTextBox1" formName="NewForm"
        useDefaultRowColoringRules="true" layout="[${date}] [${level:uppercase=true}] [${logger}] ${message}" />

..。

<logger name="*" minlevel="Trace" writeTo="file,rtb" />

添加内部日志似乎没有提供更多的信息：

...
...
2016-06-03 06:17:23.9385 Trace Scanning MessageLayoutRenderer 'Layout Renderer: ${message}'
2016-06-03 06:17:23.9550 Info Adding target File Target[file]
2016-06-03 06:17:23.9550 Debug Registering target file: NLog.Targets.FileTarget
2016-06-03 06:17:23.9550 Error Error in Parsing Configuration File. Exception: NLog.NLogConfigurationException: Exception occurred when loading configuration from C:\Users\Derek.Morin\Documents\Visual Studio 2010\Projects\ScriptCode\ScriptCode.ConvertedToC#\bin\x86\Debug\NLog.config ---> System.ArgumentException: Target cannot be found: 'RichTextBox'
   at NLog.Config.Factory`2.CreateInstance(String name)
   at NLog.Config.XmlLoggingConfiguration.ParseTargetsElement(NLogXmlElement targetsElement)
   at NLog.Config.XmlLoggingConfiguration.ParseNLogElement(NLogXmlElement nlogElement, String filePath, Boolean autoReloadDefault)
   at NLog.Config.XmlLoggingConfiguration.ParseTopLevel(NLogXmlElement content, String filePath, Boolean autoReloadDefault)
   at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)
   --- End of inner exception stack trace ---
2016-06-03 06:17:23.9700 Error Error has been raised. Exception: System.ArgumentException: Target cannot be found: 'RichTextBox'
   at NLog.Config.Factory`2.CreateInstance(String name)
   at NLog.Config.XmlLoggingConfiguration.ParseTargetsElement(NLogXmlElement targetsElement)
   at NLog.Config.XmlLoggingConfiguration.ParseNLogElement(NLogXmlElement nlogElement, String filePath, Boolean autoReloadDefault)
   at NLog.Config.XmlLoggingConfiguration.ParseTopLevel(NLogXmlElement content, String filePath, Boolean autoReloadDefault)
   at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)

如果我无法找到如何使用nlog.config文件的答案，至少我找到了以下解决办法：

我从这里改编了答案：(我不喜欢颜色的选择)

在NLog中显示RichTextBox跟踪

   private void SetupRichTextBoxLogger()
   {
      NLog.Windows.Forms.RichTextBoxTarget target = new NLog.Windows.Forms.RichTextBoxTarget();
      target.Name = "RichTextBox";
      target.Layout = "${longdate} ${level:uppercase=true} ${logger} ${message}";
      target.ControlName = nameof(this.RichTextBox1);
      target.FormName = nameof(NewForm);
      target.AutoScroll = true;
      target.MaxLines = 0;
      target.UseDefaultRowColoringRules = true;
      AsyncTargetWrapper asyncWrapper = new AsyncTargetWrapper();
      asyncWrapper.Name = "AsyncRichTextBox";
      asyncWrapper.WrappedTarget = target;

      SimpleConfigurator.ConfigureForTargetLogging( asyncWrapper, LogLevel.Trace );
   }

Answer 1

除了安装nuget包NLog.Windows.Forms (请记住使用v4.6或更高版本，以及NLog 5.0)

然后，还建议更新NLog.config以包含<extensions>中的NLog.Windows.Forms-程序集

<?xml version="1.0" encoding="utf-8" ?>
<nlog>
  <extensions> 
    <add assembly="NLog.Windows.Forms"/> 
  </extensions> 

  ...
</nlog>

Answer 2

FWIW，在升级到NLog 5并删除不推荐的NLog.Config之后，我遇到了这个问题。在使用 NLog.Config恢复到4.7.15 NLog.Config时，问题不再发生。

在我的例子中，安装NLog.Windows.Forms并没有帮助。