NLog using When Condition Renderer for value availability












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I have a value for log input (event-properties:item=Id) but that value could be empty sometimes. I'd like NLog to generate a value (guid) if it's null/empty. I'm trying this When Condition Renderer but I haven't been able to make it generate anything, the input value is still empty. What am I doing wrong?



<parameter name="Id" type="System.Guid" 
layout="${when:when=length('${event-properties:item=Id}')>0:${event-properties:item=Id}:${guid:format=N}}"/>


Using NLog 4.5.










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    0















    I have a value for log input (event-properties:item=Id) but that value could be empty sometimes. I'd like NLog to generate a value (guid) if it's null/empty. I'm trying this When Condition Renderer but I haven't been able to make it generate anything, the input value is still empty. What am I doing wrong?



    <parameter name="Id" type="System.Guid" 
    layout="${when:when=length('${event-properties:item=Id}')>0:${event-properties:item=Id}:${guid:format=N}}"/>


    Using NLog 4.5.










    share|improve this question

























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      0








      I have a value for log input (event-properties:item=Id) but that value could be empty sometimes. I'd like NLog to generate a value (guid) if it's null/empty. I'm trying this When Condition Renderer but I haven't been able to make it generate anything, the input value is still empty. What am I doing wrong?



      <parameter name="Id" type="System.Guid" 
      layout="${when:when=length('${event-properties:item=Id}')>0:${event-properties:item=Id}:${guid:format=N}}"/>


      Using NLog 4.5.










      share|improve this question














      I have a value for log input (event-properties:item=Id) but that value could be empty sometimes. I'd like NLog to generate a value (guid) if it's null/empty. I'm trying this When Condition Renderer but I haven't been able to make it generate anything, the input value is still empty. What am I doing wrong?



      <parameter name="Id" type="System.Guid" 
      layout="${when:when=length('${event-properties:item=Id}')>0:${event-properties:item=Id}:${guid:format=N}}"/>


      Using NLog 4.5.







      c# .net nlog






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      asked Nov 28 '18 at 14:19









      dstrdstr

      2,94684685




      2,94684685
























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          Alternative solution:



          <parameter name="Id" type="System.Guid" layout="${event-properties:Id:whenEmpty=${guid:format=N}}" />


          Btw. you might consider using GeneratedFromLogEvent for the ${guid} if writing to several targets. https://github.com/NLog/NLog/wiki/Guid-layout-renderer






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            1 Answer
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            Alternative solution:



            <parameter name="Id" type="System.Guid" layout="${event-properties:Id:whenEmpty=${guid:format=N}}" />


            Btw. you might consider using GeneratedFromLogEvent for the ${guid} if writing to several targets. https://github.com/NLog/NLog/wiki/Guid-layout-renderer






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              Alternative solution:



              <parameter name="Id" type="System.Guid" layout="${event-properties:Id:whenEmpty=${guid:format=N}}" />


              Btw. you might consider using GeneratedFromLogEvent for the ${guid} if writing to several targets. https://github.com/NLog/NLog/wiki/Guid-layout-renderer






              share|improve this answer




























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                Alternative solution:



                <parameter name="Id" type="System.Guid" layout="${event-properties:Id:whenEmpty=${guid:format=N}}" />


                Btw. you might consider using GeneratedFromLogEvent for the ${guid} if writing to several targets. https://github.com/NLog/NLog/wiki/Guid-layout-renderer






                share|improve this answer















                Alternative solution:



                <parameter name="Id" type="System.Guid" layout="${event-properties:Id:whenEmpty=${guid:format=N}}" />


                Btw. you might consider using GeneratedFromLogEvent for the ${guid} if writing to several targets. https://github.com/NLog/NLog/wiki/Guid-layout-renderer







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                edited Nov 29 '18 at 5:56

























                answered Nov 28 '18 at 20:44









                Rolf KristensenRolf Kristensen

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                5,8442437
































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