Log4Net保存错误日志到SQLServer的步骤与配置

一、新建数据表:MyLog

Create Table MyLog(
Id int Identity(1,1) Not Null, 		--编号
Date datetime Not Null,			--日期
Thread varchar(255) Not Null,		--线程
Level varchar(50) Not Null,			--等级
Logger varchar(255) Not Null,		--错误者
Message varchar(4000) Not Null,		--错误信息
Exception varchar(2000) Null		--错误详细信息
) ON [Primary]

二、在项目AssemblyInfo.cs文件里新增一行

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

三、在web.config中增加如下配置

<configSections>
<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
</configSections>
<log4net debug="false">
<appender name="LogFileAppender" type="log4net.Appender.FileAppender" >
<param name="File" value="c:\Log\DBLog.txt" />
<param name="AppendToFile" value="true" />
<layout type="log4net.Layout.PatternLayout">
<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
</layout>
</appender>

<appender name="ADONetAppender" type="log4net.Appender.ADONetAppender">
<bufferSize value="10"/>
<connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
<connectionString value="server=192.168.1.100;database=ZYC;user id=sa;password=password"/>
<commandText value="INSERT INTO MyLog ([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>
<root>
<level value="DEBUG" />
<appender-ref ref="ADONetAppender" />
</root>
</log4net>

四、修改Global.asax.cs中的Application_Error

protected void Application_Error(object sender, EventArgs e)
{
Exception ex = HttpContext.Current.Server.GetLastError();
ILog logger = LogManager.GetLogger(typeof(Global));
logger.Info(ex);
}

当然也可以在项目中try catch,然后捕获并写入。