Customizing the body of the email using Log4net Smtp appender

Question

How do I customize the body of the email using Log4net Smtp appender? I wanted to add custom message to the body.

Answer 1

Given you are using an appender similar this

<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
    <to value="to@domain.com" />
    <from value="from@domain.com" />
    <subject value="test logging message" />
    <smtpHost value="SMTPServer.domain.com" />
    <bufferSize value="512" />
    <lossy value="false" />
    <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%message" />
    </layout>
</appender>

You should be able to format the message using StringBuilder before logging:

var sb = new StringBuilder();
sb.Append("Header");
sb.Append(Environment.NewLine);
sb.Append("Message");
...
var msg = sb.ToString();

ILog log = //resolve ILog
log.Debug(msg);

More config samples here search for SmtpAppender