c# - 发生错误时发送电子邮件

Question

目前我的应用程序正在使用 log4net 来记录错误，为此的 web.config 如下：

<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>

但是，客户现在希望通过电子邮件将每个错误发送给他们。

执行此操作的最简单方法是什么，您可以在 web.config 文件中执行此操作吗？

Answer 1

你应该使用SmtpAppender

<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="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>

为了仅针对特定错误发送电子邮件，您可以执行以下操作

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); 
}