攻城獅的學習筆記

在nlog.config custom target中加入自訂attribute “WebHookUrl“，並使用layout renderer串接appsettings

<target name ="mySlack" xsi:type="Slack" WebHookUrl="${configsetting:item=NLogSlack.WebHookUrl}"></target>

在custom target程式中接收自訂的attribute，並在寫入log時轉為appsettings中對應的值

    [Target("Slack")]
    public class SlackTarget : AsyncTaskTarget
    {
        //接收nlog.config中自訂的attribute
        [RequiredParameter]
        public Layout WebHookUrl { get; set; }

        protected override Task WriteAsyncTask(LogEventInfo logEvent, CancellationToken cancellationToken)
        {
            //將Layout renderer轉為實際的值
            var webHookUrl = WebHookUrl.Render(logEvent);

            //do something...
        }
    }