logging into DB with log4net

问题

I use log4net for logging errors in my project. I want to log messages into DB (SQL Server) so I added AdoNetAppender but it does not work (other appenders work fine, connection string is correct). What can be wrong?

回答1:

I decided to create a bare-bones example project. This works. Perhaps you should try making it work.

Create an empty console application project. Add a reference to log4net. C# Code:

using log4net;

[assembly: log4net.Config.XmlConfigurator(Watch = true)]

namespace Litter
{
    class Program
    {
        static void Main()
        {
            LogManager.GetLogger("default").Info("Hello, World!");
        }
    }
}

Config file:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>
  <startup> 
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <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=localhost\sqlexpress;initial catalog=Litter;integrated security=True;"/>
      <commandText value="INSERT INTO Logs ([Message]) VALUES (@message)"/>
      <parameter>
        <parameterName value="@message"/>
        <dbType value="String"/>
        <size value="2000"/>
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%message"/>
        </layout>
      </parameter>
    </appender>
    <root>
      <level value="DEBUG"/>
      <appender-ref ref="AdoNetAppender"/>
    </root>
  </log4net>
</configuration>

Database table:

CREATE TABLE [dbo].[Logs]([Message] [nvarchar](2000) NOT NULL)
GO

That's about as simple as it gets. If you can make this work, then I'd start looking very closely at your app's AdoNetAppender configuration.

回答2:

Thank you all. The problem was in DB. I just have to set the RowGuid property as true.

来源：https://stackoverflow.com/questions/18257801/logging-into-db-with-log4net

标签

.net

sql-server

logging

log4net