NLog "Input string was not in a correct format." 使用 windows-身份
NLog "Input string was not in a correct format." using windows-identity
我正在尝试将一些信息记录到数据库中，但对于 nlog 配置来说还是个新手（直到现在，教程中的默认配置工作正常）我不确定我的配置中缺少什么可以正常工作。
我在应用程序启动时遇到此错误
2022-02-24 17:06:46.1375 Error Failed loading from config file location: C:\Repos\App\bin\Debug\netcoreapp3.1\NLog.config Exception: NLog.NLogConfigurationException: Exception when parsing C:\Repos\App\bin\Debug\netcoreapp3.1\NLog.config.
---> System.FormatException: Input string was not in a correct format.
at System.Text.StringBuilder.FormatError()
at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.Format(String format, Object[] args)
at NLog.NLogConfigurationException..ctor(Exception innerException, String message, Object[] messageParameters)
at NLog.Config.LoggingConfigurationParser.ConfigureObjectFromAttributes(Object targetObject, ILoggingConfigurationElement element, Boolean ignoreType)
at NLog.Config.LoggingConfigurationParser.ParseTargetElement(Target target, ILoggingConfigurationElement targetElement, Dictionary`2 typeNameToDefaultTargetParameters)
at NLog.Config.LoggingConfigurationParser.ParseTargetsElement(ILoggingConfigurationElement targetsElement)
at NLog.Config.LoggingConfigurationParser.ParseNLogSection(ILoggingConfigurationElement configSection)
at NLog.Config.XmlLoggingConfiguration.ParseNLogSection(ILoggingConfigurationElement configSection)
at NLog.Config.LoggingConfigurationParser.LoadConfig(ILoggingConfigurationElement nlogConfig, String basePath)
at NLog.Config.XmlLoggingConfiguration.ParseNLogElement(ILoggingConfigurationElement nlogElement, String filePath, Boolean autoReloadDefault)
at NLog.Config.XmlLoggingConfiguration.ParseTopLevel(NLogXmlElement content, String filePath, Boolean autoReloadDefault)
at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)
--- End of inner exception stack trace ---
at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)
at NLog.Config.XmlLoggingConfiguration..ctor(XmlReader reader, String fileName, LogFactory logFactory)
at NLog.Config.LoggingConfigurationFileLoader.LoadXmlLoggingConfiguration(XmlReader xmlReader, String configFile, LogFactory logFactory)
at NLog.Config.LoggingConfigurationFileLoader.LoadXmlLoggingConfigurationFile(LogFactory logFactory, String configFile)
at NLog.Config.LoggingConfigurationFileLoader.TryLoadLoggingConfiguration(LogFactory logFactory, String configFile, LoggingConfiguration& config)
我的配置文件如下所示
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database"
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${windows-identity}">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DatabaseName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
我知道问题出在第 28 行的某处，数据库连接的布局。
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${windows-identity}"
如果删除此行，我会收到另一个错误
"LayoutRenderer cannot be found: 'windows-identity'"
感觉是个明显的问题，但是在网上搜索我找不到解决方案。在 NLog 方面有更多经验的任何人，您能否分享一个使用 Windows-Auth 进行数据库日志记录而不是连接字符串中的 username/password 的数据库日志记录示例。
我也试过（在 windows-identity 中添加了''，但也没有用）
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity: '${identity}' | windows-identity: '${windows-identity}'"
编辑：
更新配置
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database"
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${environment-user}">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DatabaseName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
原来布局不工作。我删除了它，应用程序将开始时没有错误。但是我仍然必须添加一条规则才能在数据库中创建日志。这是 nlog 文件的工作版本。
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DbName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<logger name="*" minLevel="Trace" writeTo="database"/>
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
NLog Database-Target 没有可以分配的 Layout-属性。而是使用输入 parameter-collection.
WindowsIdentity-nuget-package 是 NetCore 上 ${windows-identity} 所必需的，必须包括：
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
也许您正在寻找 ${environment-user} ?
另请参阅：https://github.com/NLog/NLog/wiki/Windows-Identity-Layout-Renderer
我正在尝试将一些信息记录到数据库中，但对于 nlog 配置来说还是个新手（直到现在，教程中的默认配置工作正常）我不确定我的配置中缺少什么可以正常工作。
我在应用程序启动时遇到此错误
2022-02-24 17:06:46.1375 Error Failed loading from config file location: C:\Repos\App\bin\Debug\netcoreapp3.1\NLog.config Exception: NLog.NLogConfigurationException: Exception when parsing C:\Repos\App\bin\Debug\netcoreapp3.1\NLog.config.
---> System.FormatException: Input string was not in a correct format.
at System.Text.StringBuilder.FormatError()
at System.Text.StringBuilder.AppendFormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.FormatHelper(IFormatProvider provider, String format, ParamsArray args)
at System.String.Format(String format, Object[] args)
at NLog.NLogConfigurationException..ctor(Exception innerException, String message, Object[] messageParameters)
at NLog.Config.LoggingConfigurationParser.ConfigureObjectFromAttributes(Object targetObject, ILoggingConfigurationElement element, Boolean ignoreType)
at NLog.Config.LoggingConfigurationParser.ParseTargetElement(Target target, ILoggingConfigurationElement targetElement, Dictionary`2 typeNameToDefaultTargetParameters)
at NLog.Config.LoggingConfigurationParser.ParseTargetsElement(ILoggingConfigurationElement targetsElement)
at NLog.Config.LoggingConfigurationParser.ParseNLogSection(ILoggingConfigurationElement configSection)
at NLog.Config.XmlLoggingConfiguration.ParseNLogSection(ILoggingConfigurationElement configSection)
at NLog.Config.LoggingConfigurationParser.LoadConfig(ILoggingConfigurationElement nlogConfig, String basePath)
at NLog.Config.XmlLoggingConfiguration.ParseNLogElement(ILoggingConfigurationElement nlogElement, String filePath, Boolean autoReloadDefault)
at NLog.Config.XmlLoggingConfiguration.ParseTopLevel(NLogXmlElement content, String filePath, Boolean autoReloadDefault)
at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)
--- End of inner exception stack trace ---
at NLog.Config.XmlLoggingConfiguration.Initialize(XmlReader reader, String fileName, Boolean ignoreErrors)
at NLog.Config.XmlLoggingConfiguration..ctor(XmlReader reader, String fileName, LogFactory logFactory)
at NLog.Config.LoggingConfigurationFileLoader.LoadXmlLoggingConfiguration(XmlReader xmlReader, String configFile, LogFactory logFactory)
at NLog.Config.LoggingConfigurationFileLoader.LoadXmlLoggingConfigurationFile(LogFactory logFactory, String configFile)
at NLog.Config.LoggingConfigurationFileLoader.TryLoadLoggingConfiguration(LogFactory logFactory, String configFile, LoggingConfiguration& config)
我的配置文件如下所示
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database"
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${windows-identity}">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DatabaseName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
我知道问题出在第 28 行的某处，数据库连接的布局。
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${windows-identity}"
如果删除此行，我会收到另一个错误
"LayoutRenderer cannot be found: 'windows-identity'"
感觉是个明显的问题，但是在网上搜索我找不到解决方案。在 NLog 方面有更多经验的任何人，您能否分享一个使用 Windows-Auth 进行数据库日志记录而不是连接字符串中的 username/password 的数据库日志记录示例。
我也试过（在 windows-identity 中添加了''，但也没有用）
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity: '${identity}' | windows-identity: '${windows-identity}'"
编辑：
更新配置
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database"
layout="${longdate}|${level:uppercase=true}|${logger}|${message}|identity:${identity}|windows-identity:${environment-user}">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DatabaseName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
原来布局不工作。我删除了它，应用程序将开始时没有错误。但是我仍然必须添加一条规则才能在数据库中创建日志。这是 nlog 文件的工作版本。
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
autoReload="true"
throwConfigExceptions="true"
internalLogLevel="trace"
internalLogFile="c:\temp\internal-nlog-AspNetCore3.txt">
<!-- enable asp.net core layout renderers -->
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
<!-- the targets to write to -->
<targets>
<!-- File Target for all log messages with basic details -->
<target xsi:type="File" name="allfile" fileName="c:\temp\nlog-AspNetCore3-all-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}" />
<!-- File Target for own log messages with extra web details using some ASP.NET core renderers -->
<target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|" />
<!--Console Target for hosting lifetime messages to improve Docker / Visual Studio startup detection -->
<target xsi:type="Console" name="lifetimeConsole" layout="${MicrosoftConsoleLayout}" />
<target xsi:type="database" name="database">
<connectionString>
Data Source=MYCOMPUTER;Initial Catalog=DbName;Integrated Security=True
</connectionString>
<commandText>
INSERT INTO SystemLogging(LogDate,LogLevel,LogLogger,LogMessage,LogMachineName, LogUserName, LogCallSite, LogThread, LogException, LogStackTrace)
VALUES(@time_stamp, @level, @logger, @message,@machinename, @user_name, @call_site, @threadid, @log_exception, @stacktrace);
</commandText>
<parameter name="@time_stamp" layout="${longdate}"/>
<parameter name="@level" layout="${level}"/>
<parameter name="@logger" layout="${logger}"/>
<parameter name="@message" layout="${message}"/>
<parameter name="@machinename" layout="${machinename}"/>
<parameter name="@user_name" layout="${windows-identity:domain=true}"/>
<parameter name="@call_site" layout="${callsite:filename=true}"/>
<parameter name="@threadid" layout="${threadid}"/>
<parameter name="@log_exception" layout="${exception}"/>
<parameter name="@stacktrace" layout="${stacktrace}"/>
</target>
</targets>
<!-- rules to map from logger name to target -->
<rules>
<!--All logs, including from Microsoft-->
<logger name="*" minlevel="Trace" writeTo="allfile" />
<logger name="*" minLevel="Trace" writeTo="database"/>
<!--Output hosting lifetime messages to console target for faster startup detection -->
<logger name="Microsoft.Hosting.Lifetime" minlevel="Info" writeTo="lifetimeConsole, ownFile-web" final="true" />
<!--Skip non-critical Microsoft logs and so log only own logs-->
<logger name="Microsoft.*" maxlevel="Info" final="true" />
<!-- BlackHole -->
<logger name="*" minlevel="Trace" writeTo="ownFile-web" />
</rules>
</nlog>
NLog Database-Target 没有可以分配的 Layout-属性。而是使用输入 parameter-collection.
WindowsIdentity-nuget-package 是 NetCore 上 ${windows-identity} 所必需的，必须包括：
<extensions>
<add assembly="NLog.Web.AspNetCore"/>
<add assembly="NLog.WindowsIdentity"/>
</extensions>
也许您正在寻找 ${environment-user} ?
另请参阅：https://github.com/NLog/NLog/wiki/Windows-Identity-Layout-Renderer