实现log4.NET记录日志功能【WinForm】
环境：log4net.dll程序一个，它的记录方式一般是存储于文本文件、SqlLite数据库、控制台控制显示、Windows事件日志
以App.Config文件为主进行配置，根节点是<configuration></configuration>
在该根节点中添加：
<
configSections
>
<
section name
=
"
log4net
"
type
=
"
System.Configuration.IgnoreSectionHandler
"
/>
</
configSections
>
和
<
log4net
>
<!--一.定义输出到文件中-->
<appender name="LogFileAppender" type="log4net.Appender.RollingFileAppender">
<!--显示指定文件存放位置-->
<!--<file value="D:\log4netfile.txt" />-->
<!--日志文件名开头-->
<param name="File" value="MonitorConfigLog" /><!--默认存放根目录-->
<param name="AppendToFile" value="true" />
<param name="MaxSizeRollBackups" value="10"/><!-- 切割最多文件数 -->
<param name="MaximumFileSize" value="10MB"/><!-- 每个文件的大小 -->
<param name="StaticLogFileName" value="false"/>
<rollingStyle value="Date" />
<datePattern value="yyyyMMdd".log"" /><!--文件名后缀(带日期)-->
<layout type="log4net.Layout.PatternLayout">
<footer value="by Xluo" /> <!--每条日志末尾的文字说明-->
<conversionPattern value="*记录时间【%date】 级别【%-5level】 出错位置【%logger 行号：%line】 错误描述：%message%newline" /><!--输出格式-->
</layout>
</appender>
<!--
二.定义输出到控制台命令行中
-->
<
appender name
=
"
ConsoleAppender
"
type
=
"
log4net.Appender.ConsoleAppender
"
>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%date [%thread] %-5level %logger [%property{NDC}] - %message%newline
"
/>
</
layout
>
</
appender
>
<!--
三.定义输出到windows事件中
-->
<
appender name
=
"
EventLogAppender
"
type
=
"
log4net.Appender.EventLogAppender
"
>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%date [%thread] %-5level %logger [%property{NDC}] - %message%newline
"
/>
</
layout
>
</
appender
>
<!--
四.定义输出到数据库中，这里举例输出到Access数据库中，数据库为C盘的log4net.mdb
-->
<
appender name
=
"
AdoNetAppender_Access
"
type
=
"
log4net.Appender.AdoNetAppender
"
>
<
connectionString value
=
"
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:log4net.mdb
"
/>
<
commandText value
=
"
INSERT INTO LogDetails ([LogDate],[Thread],[Level],[Logger],[Message]) VALUES (@logDate, @thread, @logLevel, @logger,@message)
"
/>
<!--
定义各个参数
-->
<
parameter
>
<
parameterName value
=
"
@logDate
"
/>
<
dbType value
=
"
String
"
/>
<
size value
=
"
240
"
/>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%date
"
/>
</
layout
>
</
parameter
>
<
parameter
>
<
parameterName value
=
"
@thread
"
/>
<
dbType value
=
"
String
"
/>
<
size value
=
"
240
"
/>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%thread
"
/>
</
layout
>
</
parameter
>
<
parameter
>
<
parameterName value
=
"
@logLevel
"
/>
<
dbType value
=
"
String
"
/>
<
size value
=
"
240
"
/>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%level
"
/>
</
layout
>
</
parameter
>
<
parameter
>
<
parameterName value
=
"
@logger
"
/>
<
dbType value
=
"
String
"
/>
<
size value
=
"
240
"
/>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%logger
"
/>
</
layout
>
</
parameter
>
<
parameter
>
<
parameterName value
=
"
@message
"
/>
<
dbType value
=
"
String
"
/>
<
size value
=
"
240
"
/>
<
layout type
=
"
log4net.Layout.PatternLayout
"
>
<
conversionPattern value
=
"
%message
"
/>
</
layout
>
</
parameter
>
</
appender
>
<!--
定义日志的输出媒介，下面定义日志以四种方式输出。也可以下面的按照一种类型或其他类型输出。
-->
<
root
>
<!--
文件形式记录日志
-->
<
appender
-
ref
ref
=
"
LogFileAppender
"
/>
<!--
控制台控制显示日志
-->
<
appender
-
ref
ref
=
"
ConsoleAppender
"
/>
<!--
Windows事件日志
-->
<!--<
appender
-
ref
ref
=
"
EventLogAppender
"
/>-->
<!--
如果不启用相应的日志记录，可以通过这种方式注释掉
-->
<!--<
appender
-
ref
ref
=
"
AdoNetAppender_Access
"
/>-->
</
root
>
</
log4net
>
比如，我想在项目在UI层，添加几句示例代码，需注意以下几点：
1.在命名空间上方，需注明属性：
[assembly: log4net.Config.XmlConfigurator(Watch
=
true
)]
namespace
MonitorConfig.UI
2.在后台(.cs)文件中，实例化接口：
//
创建日志记录组件实例
ILog log
=
log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
3.记录代码书写方式：
private
void
Form1_Load(
object
sender, EventArgs e)
{
//
记录日志
log.Error(
"
有可能是数据库连接异常
"
,
new
Exception(
"
绑定前，发生一个异常-1
"
));
log.Info(
"
有可能是参数不正确
"
,
new
Exception(
"
绑定前，发生一个异常-2
"
));
}
4.日志查看：
AppConfig文件中，是配置在D盘的，文件名为 log4netfile.txt
参考来源：
http://blog.csdn.net/zhoufoxcn/archive/2008/03/26/2220533.aspx
http://blog.csdn.net/zhoufoxcn/archive/2010/11/23/6029021.aspx