写入数据库时​​出现Nlog错误，asp core 2中Nlog的正确配置是什么？

Question

asp.net核心中Nlog的正确配置是什么。我遵循了这个tutorial并且记录器正常工作，除了在数据库中写入。 我一直收到这个错误（内部nlog），

  

2017-08-30 18：05：39.8956写入数据库时​​出错错误。   例外：System.Data.SqlClient.SqlException（0x80131904）：无效   对象名称'dbo.Log'。在   System.Data.SqlClient.SqlConnection.OnError（SqlException异常，   布尔值breakConnection，Action`1 wrapCloseInAction）at   System.Data.SqlClient.SqlInternalConnection.OnError（SQLEXCEPTION   exception，Boolean breakConnection，Action`1 wrapCloseInAction）at   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning（TdsParserStateObject   stateObj，Boolean callerHasConnectionLock，Boolean asyncClose）at   System.Data.SqlClient.TdsParser.TryRun（RunBehavior runBehavior，   SqlCommand cmdHandler，SqlDataReader dataStream，   BulkCopySimpleResultSet bulkCopyHandler，TdsParserStateObject   stateObj，布尔＆amp; dataReady）at   System.Data.SqlClient.SqlCommand.FinishExecuteReader（SqlDataReader ds，   RunBehavior runBehavior，String resetOptionsString）at   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds（的CommandBehavior   cmdBehavior，RunBehavior runBehavior，Boolean returnStream，Boolean   async，Int32超时，任务＆amp; task，Boolean asyncWrite，SqlDataReader   ds）at   System.Data.SqlClient.SqlCommand.RunExecuteReader（的CommandBehavior   cmdBehavior，RunBehavior runBehavior，Boolean returnStream，   TaskCompletionSource`1完成，Int32超时，任务＆amp;任务，布尔值   asyncWrite，String方法）at   System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery（TaskCompletionSource`1   completion，Boolean sendToPipe，Int32 timeout，Boolean asyncWrite，   String methodName）at   System.Data.SqlClient.SqlCommand.ExecuteNonQuery（）at   NLog.Targets.DatabaseTarget.WriteEventToDatabase（LogEventInfo   logEvent）在NLog.Targets.DatabaseTarget.Write（LogEventInfo   logEvent）ClientConnectionId：fa24cf47-f585-4d2d-af29-134c8b4be13c   错误号码：208，状态：1，等级：16

数据库（ARTCore）中存在表dbo.Log。

我的nlog.config

<?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="D:\SQLCORE\RazorCore\ArtCore\ArtCore\Logs\internal-nlog.txt">
  <targets>
    <target xsi:type="File" name="allfile" fileName="${var:configDir}\nlog-all.log"
                    layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|${message} ${exception}" />

    <target xsi:type="File" name="ownFile-web" fileName="${var:configDir}\nlog-own.log"
             layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|  ${message} ${exception}" />

    <target xsi:type="Null" name="blackhole" />
    <target name="ARTCore" xsi:type="Database" >
      <commandText>
        insert into dbo.Log (
        Application, Logged, [Level], Message,
        Logger, CallSite, Exception
        ) values (
        @Application, @Logged, @Level, @Message,
        @Logger, @Callsite, @Exception
        );
      </commandText>
      <parameter name="@application" layout="AspNetCoreNlog" />
      <parameter name="@logged" layout="${date}" />
      <parameter name="@level" layout="${level}" />
      <parameter name="@message" layout="${message}" />
      <parameter name="@logger" layout="${logger}" />
      <parameter name="@callSite" layout="${callsite:filename=true}" />
      <parameter name="@exception" layout="${exception:tostring}" />
    </target>
  </targets>
  <rules>
    <logger name="*" minlevel="Trace" writeTo="allfile" />
    <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
    <logger name="*" minlevel="Trace" writeTo="ownFile-web" /> 
    <logger name="*" minlevel="Trace" writeTo="ARTCore" />
  </rules>
</nlog>

appsettings.json：

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Information"
    }
  },
  "ElasticsearchUrl": "http://localhost:44303",
  "ConnectionStrings": {
    "ARTCore": "Server=****;Database=ARTCore;Trusted_Connection=True;MultipleActiveResultSets=true;"
  }
}

注册

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddNLog();
            app.AddNLogWeb();
            env.ConfigureNLog("nlog.config");
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
                app.UseDatabaseErrorPage();

            }
            else
            {
                app.UseExceptionHandler("/Error");
            }
            app.UseStaticFiles();
            app.UseAuthentication();
            //LogManager.ReconfigExistingLoggers();
            LogManager.Configuration.Variables["ConnectionStrings"] = Configuration.GetConnectionString("ARTCore");
            LogManager.Configuration.Variables["configDir"] = "D:\\SQLCORE\\RazorCore\\ArtCore\\ArtCore\\Logs";
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller}/{action=Index}/{id?}");
            });
        }

我在这里缺少什么？

Answer 1

解决，

添加 connectionString="${var:ConnectionStrings}"， 并包括<PackageReference Include="System.Data.SqlClient" Version="4.4.0" />

startup.cs中的工作配置是，

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            env.ConfigureNLog("nlog.config");

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
                app.UseDatabaseErrorPage();

            }
            else
            {
                app.UseExceptionHandler("/Error");
            }
            app.UseStaticFiles();
            app.UseAuthentication();
            loggerFactory.AddNLog();
            app.AddNLogWeb();
            LogManager.Configuration.Variables["ConnectionStrings"] = Configuration.GetConnectionString("ARTCore");
            LogManager.Configuration.Variables["configDir"] = "D:\\SQLCORE\\RazorCore\\ArtCore\\ArtCore\\Logs";
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller}/{action=Index}/{id?}");
            });
        }

而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"
      keepVariablesOnReload="true"
      internalLogLevel="Warn"
      throwExceptions="false"
      internalLogFile="D:\SQLCORE\RazorCore\ArtCore\ArtCore\Logs\internal-nlog.txt">
  <targets>
    <target xsi:type="File" name="allfile" fileName="${var:configDir}\nlog-all.log"
                    layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|${message} ${exception}" />

    <target xsi:type="File" name="ownFile-web" fileName="${var:configDir}\nlog-own.log"
             layout="${longdate}|${event-properties:item=EventId.Id}|${logger}|${uppercase:${level}}|  ${message} ${exception}" />

    <target xsi:type="Null" name="blackhole" />
    <target name="ARTCore" xsi:type="Database" connectionString="${var:ConnectionStrings}" >
      <commandText>
        insert into dbo.Log (
        Application, Logged, [Level], Message,
        Logger, CallSite, Exception
        ) values (
        @Application, @Logged, @Level, @Message,
        @Logger, @Callsite, @Exception
        );
      </commandText>
      <parameter name="@application" layout="AspNetCoreNlog" />
      <parameter name="@logged" layout="${date}" />
      <parameter name="@level" layout="${level}" />
      <parameter name="@message" layout="${message}" />
      <parameter name="@logger" layout="${logger}" />
      <parameter name="@callSite" layout="${callsite:filename=true}" />
      <parameter name="@exception" layout="${exception:tostring}" />
    </target>
  </targets>
  <rules>
    <logger name="*" minlevel="Trace" writeTo="allfile" />
    <logger name="Microsoft.*" minlevel="Trace" writeTo="blackhole" final="true" />
    <logger name="*" minlevel="Trace" writeTo="ownFile-web" /> 
    <logger name="*" minlevel="Trace" writeTo="ARTCore" />
  </rules>
</nlog>

Reference