C# Log4Net日志怎样实现远程记录

要实现远程记录Log4Net日志，可以使用Log4Net的远程Appender来实现。远程Appender可以将日志信息发送到远程服务器进行记录。

以下是一个简单的示例代码，演示如何使用Log4Net的AdoNetAppender将日志信息记录到远程数据库：

using log4net;
using log4net.Config;
using log4net.Appender;
using log4net.Layout;
using System;

namespace RemoteLoggingExample
{
    class Program
    {
        private static readonly ILog log = LogManager.GetLogger(typeof(Program));

        static void Main(string[] args)
        {
            // 加载Log4Net配置文件
            XmlConfigurator.Configure(new System.IO.FileInfo("log4net.config"));

            log.Info("This is a remote log message.");

            Console.ReadLine();
        }
    }
}

在log4net.config配置文件中配置AdoNetAppender来实现远程记录日志到数据库：

<log4net>
  <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">
    <bufferSize value="1" />
    <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
    <connectionString value="Data Source=remoteServerName;Initial Catalog=loggingDB;User ID=username;Password=password;" />
    <commandText value="INSERT INTO Logs (Date, Thread, Level, Logger, Message) VALUES (@log_date, @thread, @log_level, @logger, @message)" />
    <parameter>
      <parameterName value="@log_date" />
      <dbType value="DateTime" />
      <layout type="log4net.Layout.RawTimeStampLayout" />
    </parameter>
    <parameter>
      <parameterName value="@thread" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%thread" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@log_level" />
      <dbType value="String" />
      <size value="50" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%level" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@logger" />
      <dbType value="String" />
      <size value="255" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%logger" />
      </layout>
    </parameter>
    <parameter>
      <parameterName value="@message" />
      <dbType value="String" />
      <size value="4000" />
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%message" />
      </layout>
    </parameter>
  </appender>

  <root>
    <level value="ALL" />
    <appender-ref ref="AdoNetAppender" />
  </root>
</log4net>

需要根据实际情况修改connectionString、commandText等配置信息，确保能够正确连接到远程数据库并将日志信息记录到指定表中。