我的NLog记录未保存。我在哪里可以看到NLog的保存失败？

Question

我有2个NLog数据库目标。第一个一直在工作。当我检查数据库中的表时，我刚刚添加的第二个似乎没有保存。但是，我也没有例外要进行调试。。是否可以打开某些内容？还是我需要看的地方？

也许如果有NLog专家，他们可以看到我可能犯的一个简单错误吗？这是我用于创建NLog配置的代码：

 // nlog config (ExceptionTracking)
            LogManager.ThrowExceptions = true;
            // Using NLog.Common
            InternalLogger.LogLevel = LogLevel.Warn;
            InternalLogger.LogFile = @"c:\log.txt";

            var config = new LoggingConfiguration();
            var dbTarget = new DatabaseTarget()
            {
                Name = "ExceptionTracking",
                ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["NLogConnection"].ConnectionString,
                CommandText = "INSERT INTO Common.ExceptionTracking ( ApplicationID,  Url,  IP,  Referrer,  UserName,  ExceptionDescription,  Action,  Controller,  InsertedBy,  InsertedDate) " +
                                                            "VALUES (@ApplicationID, @Url, @IP, @Referrer, @UserName, @ExceptionDescription, @Action, @Controller, @InsertedBy, @InsertedDate);"
            };

            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@ApplicationID", Layout = "${appsetting:name=AppID:default=null}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@Url", Layout = "${aspnet-Request-Url}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@IP", Layout = "${aspnet-Request-IP}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@Referrer", Layout = "${aspnet-Request-Referrer}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@UserName", Layout = "${identity:authType=false:isAuthenticated=false}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@ExceptionDescription", Layout = "${exception:tostring}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@Action", Layout = "${aspnet-MVC-Action}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@Controller", Layout = "${aspnet-MVC-Controller}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@InsertedBy", Layout = "${gdc:BEMSID}" });
            dbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@InsertedDate", Layout = "${date}" });

            config.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, dbTarget));


            // Add another NLog Target (ChangeTracking)
            var changeTrackingDbTarget = new DatabaseTarget()
            {
                Name = "ChangeTracking",
                ConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["NLogConnection"].ConnectionString,
                CommandText = "INSERT INTO Common.ChangeTracking ( ApplicationID,  UserName,  Name,  EntityName,  PropertyName,  PrimaryKeyValue,  OldValue,  NewValue, DateChanged) " +
                                                            "VALUES (@ApplicationID, @UserName, @Name, @EntityName, @PropertyName, @PrimaryKeyValue, @OldValue, @NewValue, @DateChanged);"
            };

            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@ApplicationID", Layout = "${appsetting:name=AppID:default=null}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@UserName", Layout = "${identity:authType=false:isAuthenticated=false}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@Name", Layout = "${event-properties:item=name}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@EntityName", Layout = "${event-properties:item=entityname}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@PropertyName", Layout = "${event-properties:item=propname}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@PrimaryKeyValue", Layout = "${event-properties:item=primarykey}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@OldValue", Layout = "${event-properties:item=oldvalue}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@NewValue", Layout = "${event-properties:item=newvalue}" });
            changeTrackingDbTarget.Parameters.Add(new DatabaseParameterInfo() { Name = "@DateChanged", Layout = "${date}" });

            config.LoggingRules.Add(new LoggingRule("*", LogLevel.Off, changeTrackingDbTarget));

            LogManager.Configuration = config;
            LogManager.Configuration.AddTarget("ExceptionTracking", dbTarget);
            LogManager.Configuration.AddTarget("ChangeTracking", changeTrackingDbTarget);
        }

这里是试图实际创建日志的代码：

private static Logger _logger = LogManager.GetLogger("ChangeTracking");
                        LogEventInfo changeEvent = new LogEventInfo(LogLevel.Info, "ChangeTracking", "A change event has been fired");
                        changeEvent.Properties["Name"] = "Jake";
                        changeEvent.Properties["EntityName"] = "test";
                        changeEvent.Properties["PropertyName"] = "test property name";
                        changeEvent.Properties["PrimaryKeyValue"] = "test";
                        changeEvent.Properties["OldValue"] = "test";
                        changeEvent.Properties["NewValue"] = "test";
                        _logger.Log(changeEvent);

Answer 1

有什么我可以打开的吗？

throwExceptions

您可以启用NLog引发异常。配置：

<nlog throwExceptions="true" >

或使用代码：

LogManager.ThrowExceptions = true

内部日志

您可以启用内部日志。这将通过NLog在内部显示日志。在这种情况下，警告（和上方）应该足够。

配置：

<nlog internalLogFile="c:\log.txt" internalLogLevel="Warn">

使用代码：

// Using NLog.Common
InternalLogger.LogLevel = LogLevel.Warn;
InternalLogger.LogFile = @"c:\log.txt";

查看有关内部日志here的更多信息

阅读更多

还有troubleshooting guide for NLog

Answer 2

问题不是您混淆了目标名称，而是这一行：

config.LoggingRules.Add(new LoggingRule("*", LogLevel.Off, changeTrackingDbTarget));

注意您如何选择LogLevel.Off。我建议您改用它：

config.AddRule(LogLevel.Trace, LogLevel.Fatal, changeTrackingDbTarget);

另请参见：https://github.com/nlog/nlog/wiki/Tutorial#configure-nlog-targets-for-output