Log4net cannot Write database using C# - sql

Question

I have already tried it and found many similar questions, but i can't see one data on my SQL.
Here it's my app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<log4net>
<root>
<level value="ALL"></level>
<appender-ref ref="AdoNetAppender"></appender-ref>
</root>
<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=.;initial catalog=dblog;integrated security=false;persist security info=True;User ID=bernie4;Password=GoodSQL" />
<commandText value="INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (#log_date, #thread, #log_level, #logger, #message, #exception)" />
<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>
<parameter>
<parameterName value="#exception" />
<dbType value="String" />
<size value="2000" />
<layout type="log4net.Layout.ExceptionLayout" />
</parameter>
</appender>
</log4net>
</configuration>
Here is another code ,i tried add to my app.config for code track, but i review my C drive or other position not found the log4net.txt or data.
<configuration>
...
<appSettings>
<add key="log4net.Internal.Debug" value="true"/>
</appSettings>
...
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="C:\tmp\log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
</configuration>
Here is how I'm using C# Create to the log:
using System;
using System.Windows.Forms;
using log4net;
using System.Reflection;
namespace WindowsFormsApp1
{
public partial class Form1 : Form
{
log4net.ILog log;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
log4net.Config.XmlConfigurator.Configure();
log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
}
private void button1_Click(object sender, EventArgs e)
{
log.Info("your data has been successfully saved.");
}
}
}
if these code successful work , i can see it show string is "your data has been successfully saved" on my SQL ,when i Triggered button1_Click event,but the database not showing nothing.
i watch many people has similar questions ,i tried edit my code,but still useless.
1.bufferSize value="1"
2.log4net.Config.XmlConfigurator.Configure();
3.name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"
finally , here is my software and dll version:
C# :2017
log4net.dll :2.0.8.0 -Net 4.5
SQL :2017

Answer 1

You don't see any logging (including no Log4net debug logging) because your App.config file doesn't get loaded as it isn't valid;
the <configSections> element must be the first child element under <configuration>.
With that in place, you will at least see the internal log4net debug logging.
If the AdoNetAppender has been configured correctly, the database logging will also be present; if not, you can refer to the debug logging.
Your App.config should look like here below.
<configuration>
<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<appSettings>
<add key="log4net.Internal.Debug" value="true" />
</appSettings>
<log4net>
<!-- Your log4net configuration goes here -->
</log4net>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add
name="textWriterTraceListener"
type="System.Diagnostics.TextWriterTraceListener"
initializeData="c:\tmp\log4net.txt" />
</listeners>
</trace>
</system.diagnostics>
</configuration>