Send an Email When an Error Occurs in C# using log4net
c#, email, log4net
Solution
You should use `SmtpAppender`
<appender name="SmtpAppender" type="log4net.Appender.SmtpAppender">
<to value="to@example.com" />
<from value="from@example.com" />
<subject value="test logging message" />
<smtpHost value="SMTPServer.example.com" />
<bufferSize value="512" />
<lossy value="true" />
<evaluator type="log4net.Core.LevelEvaluator">
<threshold value="WARN"/>
</evaluator>
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%newline%date [%thread] %-5level %logger [%property{NDC}] - %message%newline%newline%newline" />
</layout>
</appender>
<logger name="ErrorLogger">
<level value="Error" />
<appender-ref ref="FileAppender" />
</logger>
<logger name="EmailLogger">
<level value="Error" />
<appender-ref ref="SmtpAppender" />
</logger>
In order to send emails only for an specific error you could do something like this
try
{
// your logic
}
catch (MySpecificException ex)
{
// I only send emails for exception of type MySpecificException
LogManager.GetLogger("EmailLogger").Error(ex);
}
catch (Exception ex)
{
// Just log to a file for the rest
LogManager.GetLogger("ErrorLogger").Error(ex);
}
Problem
Currently my application is using log4net to log errors, the `web.config` for this is as followed: ``` <log4net> <appender name="FileAppender" type="log4net.Appender.RollingFileAppender"> <file type="log4net.Util.PatternString" value="../../logs/gateway_%date{yyyyMMdd}.log" /> <appendToFile value="true" /> <rollingStyle value="Date" /> <datePattern value="yyyyMMdd" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] – %message%newline" /> </layout> </appender> <root> <level value="DEBUG" /> <appender-ref ref="RollingLogFileAppenderOutput" /> </root> </log4net> ``` However, the client now wants each error to be emailled to them. What is the easiest way to do this, can you do it within the `web.config` file?