Question

我可以在本地计算机上写入NLog，但是当我部署到服务器时它会失败。

   public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole();
        loggerFactory.AddDebug();
        loggerFactory.AddNLog();
        app.AddNLogWeb();

        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler();
        }

        app.UseMvc();
        SetAutomapper();
        try
        {
            var logger = LogManager.GetCurrentClassLogger();
            logger.Info("Started Properties Web API");
        }
        catch (Exception e)
        {

上面的代码在我的Web API Core项目Startup类中。错误消息是

SqlException: Error converting data type nvarchar to datetime.

我使用标准存储过程写入NLog;

ALTER PROCEDURE [dbo].[NLog_AddEntry_p] (
  @machineName nvarchar(200),
  @siteName nvarchar(200),
  @logged datetime,
  @level varchar(5),
  @userName nvarchar(200),
  @message nvarchar(max),
  @logger nvarchar(300),
  @properties nvarchar(max),
  @serverName nvarchar(200),
  @port nvarchar(100),
  @url nvarchar(2000),
  @https bit,
  @serverAddress nvarchar(100),
  @remoteAddress nvarchar(100),
  @callSite nvarchar(300),
  @exception nvarchar(max)
) AS
BEGIN
  INSERT INTO [dbo].[SIR_NLog] (
    [MachineName],
    [SiteName],
    [Logged],
    [Level],
    [UserName],
    [Message],
    [Logger],
    [Properties],
    [ServerName],
    [Port],
    [Url],
    [Https],
    [ServerAddress],
    [RemoteAddress],
    [CallSite],
    [Exception]
  ) VALUES (
    @machineName,
    @siteName,
    @logged,
    @level,
    @userName,
    @message,
    @logger,
    @properties,
    @serverName,
    @port,
    @url,
    @https,
    @serverAddress,
    @remoteAddress,
    @callSite,
    @exception
  );
END

因此，问题在于Logged参数字段必须以字符串而不是日期发送。为什么会这样？

编辑：我的NLog.config是

<?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"
      internalLogLevel="Warn"
      internalLogFile="c:\temp\internal-nlog.txt">
  <!-- throwExceptions="true"-->

  <!-- Load the ASP.NET Core plugin -->
  <extensions>
    <add assembly="NLog.Web.AspNetCore" />
  </extensions>

  <!-- the targets to write to -->
  <targets>
    <target name="db"
            xsi:type="Database"
            dbProvider="System.Data.SqlClient"
            connectionString="${var:SirNLogDb}"
            commandType="StoredProcedure"
            commandText="[dbo].[NLog_AddEntry_p]">
      <parameter name="@machineName"    layout="${machinename}" />
      <parameter name="@siteName"       layout="${iis-site-name}" />
      <parameter name="@logged"         layout="${date}" />
      <parameter name="@level"          layout="${level}" />
      <parameter name="@username"       layout="${aspnet-user-identity}" />
      <parameter name="@message"        layout="${message}" />
      <parameter name="@logger"         layout="${logger}" />
      <parameter name="@properties"     layout="${all-event-properties:separator=|}" />
      <parameter name="@serverName"     layout="${aspnet-request:serverVariable=SERVER_NAME}" />
      <parameter name="@port"           layout="${aspnet-request:serverVariable=SERVER_PORT}" />
      <parameter name="@url"            layout="${aspnet-request:serverVariable=HTTP_URL}" />
      <parameter name="@https"          layout="${when:inner=1:when='${aspnet-request:serverVariable=HTTPS}' == 'on'}${when:inner=0:when='${aspnet-request:serverVariable=HTTPS}' != 'on'}" />
      <parameter name="@serverAddress"  layout="${aspnet-request:serverVariable=LOCAL_ADDR}" />
      <parameter name="@remoteAddress"  layout="${aspnet-request:serverVariable=REMOTE_ADDR}:${aspnet-request:serverVariable=REMOTE_PORT}" />
      <parameter name="@callSite"       layout="${callsite}" />
      <parameter name="@exception"      layout="${exception:tostring}" />
    </target>
  </targets>

  <!-- rules to map from logger name to target -->
  <rules>
    <!--All logs, including from Microsoft-->
    <logger name="*" minlevel="Trace" writeTo="db" />
  </rules>
</nlog>

Answer 1

所以我发现的问题是每个服务器上的区域日期设置不同。一个是美国英语，另一个是英国人。这种情况最简单的解决方案是删除@logged参数，然后使用GetDate（）来获取当前日期。可能有更好的解决方案。 SQL Server应该都具有相同的日期设置，但我不确定它的效果是什么。

无法让NLog写入服务器上的光盘

1 个答案: