Nlog: how to write a config file for implementing that create a new log file named by longdate every app starting up

[boruoboluomii]

I have tried to create a variable at config file
<variable name="fileName" value="${longdate}" />

<target name="info" keepFileOpen="true" xsi:type="File" fileName="${basedir}/logs/info/log_${fileName}.log"           
            encoding="utf-8" layout="${longdate} ${callsite} [${level}]： ${message}" />

but it create a lot log file. how to write a config file for implementing that create a new log file named by longdate every app starting up?

Thanks a lot.

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[boruoboluomii]

I have implementing it by inherit FileTarget class.

[Target("MyFirst")]
    public sealed class MyFirstTarget : FileTarget
    {
        public MyFirstTarget()
        {
            DateTime t1 = DateTime.Now;
            string s1 = t1.ToString("yyyy-MM-dd hh:mm:ss fff");
            FileName = "${basedir}/logs/info/" + s1 + ".txt";
        }
    } 

config file insert it

  <extensions>
    <add assembly="Ext1"/>
  </extensions>

<target name="first" type="MyFirst" encoding="utf-8" layout="${longdate} ${callsite} [${level}]： ${message}" />

i thank it can be implemeted by a esay way.

[304NotModified]

You could use cached:

${longdate:cached=true}

See https://github.com/NLog/NLog/wiki/Cached-Layout-Renderer

Related, the latest example in that page

[boruoboluomii]

It does work, thanks a lot