我看了BufferingWrapper的文档,不知道怎么做......
我做了一个简单的例子。
假设我在错误发生之前记录了一些我需要的信息。
logger.LogInformation("a");
logger.LogInformation("b");
logger.LogInformation("c");
logger.LogError(new Exception("My Custom Exception"), "Test Mail1");
logger.LogInformation("1");
logger.LogWarning("2");
logger.LogWarning("3");
logger.LogInformation("4");
logger.LogInformation("5");
logger.LogError(new Exception("My Custom Exception"), "Test Mail2");
我希望能收到两封这样的邮件
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner a
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner b
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner c
2020-05-14 XX: XX: XX.XXXX [1] ERROR ConsoleApp1.Runner Test Mail1 System.Exception: My Custom Exception
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner 1
2020-05-14 XX: XX: XX.XXXX [1] WARN ConsoleApp1.Runner 2
2020-05-14 XX: XX: XX.XXXX [1] WARN ConsoleApp1.Runner 3
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner 4
2020-05-14 XX: XX: XX.XXXX [1] INFO ConsoleApp1.Runner 5
2020-05-14 XX: XX: XX.XXXX [1] ERROR ConsoleApp1.Runner Test Mail2 System.Exception: My Custom Exception
但我只能收到两封邮件的错误信息。
2020-05-14 XX: XX: XX.XXXX [1] ERROR ConsoleApp1.Runner Test Mail1 System.Exception: My Custom Exception
2020-05-14 XX: XX: XX.XXXX [1] ERROR ConsoleApp1.Runner Test Mail2 System.Exception: My Custom Exception
如何才能在错误发生时,将前面五个不同级别的日志包含进来?
这是我的nlog.config
<?xml version="1.0" encoding="utf-8" ?>
<!-- XSD manual extracted from package NLog.Schema: https://www.nuget.org/packages/NLog.Schema-->
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xsi:schemaLocation="NLog NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
internalLogFile="c:\temp\console-example-internal.log"
internalLogLevel="Info" >
<extensions>
<add assembly="NLog.MailKit"/>
</extensions>
<targets>
<target xsi:type="Mail"
name="MailTarget"
layout="${longdate:universalTime=true} [${threadid}] ${uppercase:${level}} ${logger} ${message} ${exception:format=tostring}"
addNewLines="true"
subject="[My Error Log - Dev] Execption"
to=""
from=""
smtpServer="" />
</targets>
<!-- rules to map from logger name to target -->
<rules>
<logger name="*" level="Error" writeTo="MailTarget" />
</rules>
</nlog>
好吧,一个好的起点是激活 BufferingWrapper
,就像这样。
<targets>
<target xsi:type"BufferingWrapper" name="MailBuffer">
<target xsi:type="Mail" name="MailTarget" />
</target>
</targets>
<rules>
<logger name="*" level="Error" writeTo="MailBuffer" />
</rules>
但现在你只是启用了缓冲写入Error -LogEvents到MailTarget的功能,而缺少了这些功能。
应该包括Info -LogEvents而不仅仅是Error -LogEvents.
level="Error"
到 minLevel="Info"
.应该只在Error-LogEvent发生时才写入Info-LogEvents,这可以通过使用AutoFlushWrapper来实现,所以它在Error-LogEvent时触发缓冲的LogEvents的刷新。
overflowAction="Discard"
上的 BufferingWrapper例子。
<targets>
<target xsi:type="AutoFlushWrapper" name="MailErrorFlush"
condition="level >= LogLevel.Error"
flushOnConditionOnly="true">
<target xsi:type="BufferingWrapper" name="MailBuffer"
bufferSize="50"
overflowAction="Discard">
<target xsi:type="Mail" name="MailTarget" />
</target>
</target>
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="MailErrorFlush" />
</rules>
另见 https:/github.comnlogNLogwikiBufferingWrapper-target#send-batch-when-triggered-event。