c# - 将 nlog 中的记录添加到 dataType = date 的字段

Question

我使用nlog dll写入数据库 - 带有实体frameWork的oracle行:

logger.Log(logLevel, "try");

我在 nlog 日志中收到以下错误:

The literal does not match the template string

代码是:

        SetPropGDC(LogEntity);
        NLog.LogLevel logLevel = SetLogLevel(Level.Debug);
        logger.Log(logLevel, "try");
        ClearGDC();



 private void SetPropGDC(LogEntity LogEntity)
    {
        GlobalDiagnosticsContext.Set(processId, LogEntity.PROCESS_ID.ToString());
        GlobalDiagnosticsContext.Set("TIME_STAMP", DateTime.Now);
        GlobalDiagnosticsContext.Set(customerId, LogEntity.CUSTOMER_ID.ToString());

    }
<targets>
<target name="TRACEDatabase" type="DataBase"  keepConnection="false" 
         dbProvider="Oracle.ManagedDataAccess.Client" connectionString="${gdc:connectionString}"
         commandText="insert into TLOG_SITE_GENERAL_TRACE( PROCESS_ID,TIME_STAMP,CUSTOMER_ID)
                       values(:PROCESS_ID,:TIME_STAMP,:CUSTOMER_ID)">
  <parameter name="PROCESS_ID" layout="${gdc:PROCESS_ID}" />
  <parameter name="TIME_STAMP" layout="${gdc:TIME_STAMP}" />
  <parameter name="CUSTOMER_ID" layout="${gdc:CUSTOMER_ID}" />

</target>

我尝试在 Web.config 中更改行:

      <parameter name="TIME_STAMP" layout="${gdc:TIME_STAMP}" />

至:

   <parameter name="TIME_STAMP" layout="${longDate}" />

我也遇到了同样的错误

有人可以帮忙吗？

Answer 1

NLog DatabaseTarget 参数默认转换为字符串。您可以通过指定 dbType 来更改数据类型，使其与数据库列匹配:

<target name="TRACEDatabase" type="DataBase">
    <parameter name="PROCESS_ID" layout="${event-properties:PROCESS_ID}" />
    <parameter name="TIME_STAMP" layout="${date}" dbType="DateTime" />
    <parameter name="CUSTOMER_ID" layout="${event-properties:CUSTOMER_ID}" />
</target>

顺便说一句。使用全局变量来传输上下文特定细节是一个坏主意。

相反，您应该使用 NLog LogEventInfo 属性:

var logLevel = SetLogLevel(Level.Debug);
var theEvent = new NLog.LogEventInfo(logLevel, null, "try");
theEvent.Properties["PROCESS_ID"] = LogEntity.PROCESS_ID.ToString();
theEvent.Properties["CUSTOMER_ID"] = LogEntity.CUSTOMER_ID.ToString();
log.Log(theEvent);

另请参阅:https://github.com/NLog/NLog/wiki/EventProperties-Layout-Renderer