NLog：如何在一种配置下添加 2 个不同的数据库目标和规则？

Question

我一直在研究如何以编程方式添加多个数据库目标。我只需要 2 个，但我似乎无法弄清楚如何让它们工作。

我只能让 1 个目标和记录器工作。例如，下面的 2 个代码块有效：

我的配置代码（1个目标）：

    var config = new LoggingConfiguration();
    // 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, EntityName, PropertyName, PrimaryKeyValue, OldValue, NewValue, DateChanged) " +
                      "VALUES (@ApplicationID, @UserName, @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 = "@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.Info, changeTrackingDbTarget));

    //LogManager.Configuration.AddTarget("ExceptionTracking", dbTarget);
    LogManager.Configuration = config;

我调用日志的代码（1 个目标）：

private static Logger _logger = LogManager.GetLogger("ChangeTracking");
                        LogEventInfo changeEvent = new LogEventInfo(LogLevel.Info, "ChangeTracking", "A change event has been fired");
                        changeEvent.Properties["ENTITYNAME"] = entityName;
                        changeEvent.Properties["PROPNAME"] = prop;
                        changeEvent.Properties["PRIMARYKEY"] = primaryKey;
                        changeEvent.Properties["OLDVALUE"] = originalValueString;
                        changeEvent.Properties["NEWVALUE"] = currentValueString;
                        _logger.Log(changeEvent);

我的配置代码（2个目标）：

    // Setup NLOG Database Target for Exception Tracking
    LogManager.ThrowExceptions = true;
    var dbTargetExceptions = 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);"
    };
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@ApplicationID", Layout = "${appsetting:name=AppID:default=null}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@Url", Layout = "${aspnet-Request-Url}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@IP", Layout = "${aspnet-Request-IP}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@Referrer", Layout = "${aspnet-Request-Referrer}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@UserName", Layout = "${identity:authType=false:isAuthenticated=false}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@ExceptionDescription", Layout = "${exception:tostring}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@Action", Layout = "${aspnet-MVC-Action}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@Controller", Layout = "${aspnet-MVC-Controller}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@InsertedBy", Layout = "${gdc:BEMSID}" });
    dbTargetExceptions.Parameters.Add(new DatabaseParameterInfo() { Name = "@InsertedDate", Layout = "${date}" });

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

    //Setup NLOG Configuration. Adding DB Targets and Rules for Targets
    LoggingConfiguration nLogConfig = new LoggingConfiguration();
    nLogConfig.AddTarget("ExceptionTracking", dbTargetExceptions);
    nLogConfig.AddTarget("ChangeTracking", dbTargetChanges);
    nLogConfig.LoggingRules.Add(new LoggingRule("ChangeLogger", LogLevel.Info, dbTargetChanges));
    nLogConfig.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, dbTargetExceptions));

    //Finally set the configuration above to the LogManager config property
    LogManager.Configuration = nLogConfig;

我调用日志的代码（2 个目标）：

 private static Logger _logger = LogManager.GetLogger("ChangeTracking");
                        LogEventInfo changeEvent = new LogEventInfo(LogLevel.Info, "ChangeTracking", "A change event has been fired");
                        changeEvent.Properties["ENTITYNAME"] = entityName;
                        changeEvent.Properties["PROPNAME"] = prop;
                        changeEvent.Properties["PRIMARYKEY"] = primaryKey;
                        changeEvent.Properties["OLDVALUE"] = originalValueString;
                        changeEvent.Properties["NEWVALUE"] = currentValueString;
                        _logger.Log(changeEvent);

Answer 1

您的配置正确。 AddTarget 并不是真正必需的，因为您将 Target 传递给规则并且 Target 具有相同的名称属性。所以这应该足够了：

LoggingConfiguration nLogConfig = new LoggingConfiguration();
nLogConfig.LoggingRules.Add(new LoggingRule("ChangeLogger", LogLevel.Info, dbTargetChanges));
nLogConfig.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, dbTargetExceptions));

//Finally set the configuration above to the LogManager config property
LogManager.Configuration = nLogConfig;

我个人更喜欢 LoggingConfiguration 上的 AddRule。这和上面一样，但是AddRule-style:

LoggingConfiguration nLogConfig = new LoggingConfiguration();
nLogConfig.AddRule(LogLevel.Info, LogLevel.Fatal, dbTargetChanges, "ChangeLogger");
nLogConfig.AddRule(LogLevel.Trace, LogLevel.Fatal, dbTargetExceptions);

//Finally set the configuration above to the LogManager config property
LogManager.Configuration = nLogConfig;

如果这在您的更改中不起作用，enable and check the internal log 在跟踪级别。

and the other I want to call by default everywhere else

请注意，规则是从上到下处理的，只有在您添加 "final"（或不匹配的条件）时才会停止。

因此对于上述配置，写入 "ChangeLogger" 将写入两个目标。我不确定这是否是您所需要的。如果不是那么：

或在第一条规则中添加Final = true

// Old style
nLogConfig.LoggingRules.Add(new LoggingRule("ChangeLogger", LogLevel.Info, dbTargetChanges){Final = true});
nLogConfig.LoggingRules.Add(new LoggingRule("*", LogLevel.Trace, dbTargetExceptions));
// Or AddRule style:
nLogConfig.AddRule(LogLevel.Info, LogLevel.Fatal, dbTargetChanges, "ChangeLogger", true);  
nLogConfig.AddRule(LogLevel.Trace, LogLevel.Fatal, dbTargetExceptions);

或在第二条规则中添加condition/filter。

更新后

我认为你的问题出在这里，它将目标添加到名称 "ExceptionTracking" 下，而规则是 "ChangeTracking"。我认为这是在测试时启用的：

 //LogManager.Configuration.AddTarget("ExceptionTracking", dbTarget);

我添加了一些评论以使事情更清楚：

var changeTrackingDbTarget = new DatabaseTarget()
{
    Name = "ChangeTracking",
  ...
};

...

// add rule to target with name ChangeTracking
config.LoggingRules.Add(new LoggingRule("*", LogLevel.Info, changeTrackingDbTarget));

// register target not under ChangeTracking, but under ExceptionTracking
LogManager.Configuration.AddTarget("ExceptionTracking", dbTarget);
LogManager.Configuration = config;

NLog：如何在一种配置下添加 2 个不同的数据库目标和规则？

NLog: How to add 2 different database targets and rules under one configuration?

c#

asp.net-mvc

nlog

更新后