CODEWITHSUNDEEP
c#asp.net-mvcasp.net-mvc-4nlog
Amith George
Amith George

Reputation: 5916

Configure NLog programmatically, web.config

I have following Nlog config section in my web.config (modified to show only relevant info)

<nlog>
    <targets async="true">
      <target name="mail" type="Mail"
              body="${date:format=yyyy-MM-dd HH\:mm\:ss} - ${level} [${logger}] - ${message} ${newline}${newline}${event-context:item=OtherInfo}${newline}${newline}${exception:maxInnerExceptionLevel=2:format=ToString}${newline}${newline}" 
              subject="[${machinename}] ${logger}"
              to="[email protected]" encoding="UTF-8" from="[email protected]" smtpServer="" enableSsl="true" smtpAuthentication="Basic"
      />
    </targets>
    <targets>
      <target name="mailsync" type="Mail" body="${date:format=yyyy-MM-dd HH\:mm\:ss} - ${level} [${logger}] - ${message} ${newline}${newline}${event-context:item=OtherInfo}${newline}${newline}${exception:maxInnerExceptionLevel=2:format=ToString}${newline}${newline}" subject="[${machinename}] ${logger}"
              to="[email protected]" encoding="UTF-8" from="[email protected]" smtpServer="" enableSsl="true" smtpAuthentication="Basic"
      />
    </targets>
    <rules>
      <logger name="*" level="Error" writeTo="mail" />
    </rules>
</nlog>

I am updating the configuration via code in Application_Start,

var config = LogManager.Configuration;
const string targetName = "mail";

var wrapper = (AsyncTargetWrapper) config.FindTargetByName(targetName);
wrapper.WrappedTarget.SmtpServer = "hostname";
wrapper.WrappedTarget.SmtpUserName = "username";
wrapper.WrappedTarget.SmtpPassword = "password";

config.RemoveTarget(targetName);
config.AddTarget(targetName, wrapper);

LogManager.Configuration = config;

However, when I log any errors, the emails are not being sent. I have an additional file target (not shown in the code snippet), that contains the error message. That tells me the errors are getting logged, but somehow not sent via email.

If instead of updating the config via code, if I hard code the values in the web.config, then the emails get sent. I have verified that the smtp values that I am using via code are valid.

I did search through many similar questions on SO, but I haven't yet found one that mentions a solution that works for me.

EDIT:

Based on Xharze's answer, I enabled exceptions, internal logging and I also outputted the values of the target after I had made my changes. The internal log showed an exception about a MailAdrress being the incorrect format. So I checked all target values that accept an email address and I found the issue. The from property of the target accepts an email address whereas I was providing it a display name!

Upvotes: 1

Views: 4432

Answers (1)

Xharze
Xharze

Reputation: 2733

Could you try enabling throw exceptions and the interalnal log, and post it? It may provide more information. See github.com/NLog/NLog/wiki/Logging-troubleshooting.

Upvotes: 2

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