通过代码配置 Log4net
最近将项目的异常日志模块改造成log4net。在Asp.net MVC3 中的改造非常简单，我们只要继承HandleErrorAttribute类使用自定义类，
使用特性即可统一处理MVC controller 下的 所有的Action 方法的异常。无须try ... catch.... 详情请见我的这篇随笔
http://www.cnblogs.com/ryanding/archive/2010/11/16/1878168.html。我们只要在上文的CustomHandleErrorAttribute方法内植入Log4Net 即可。
具体的留给读者自己去实践了。本文主要讲解如何通过代码配置Log4Net。将程序的异常信息保存到相关文件以及SQLSERVER数据库。
这里需要提下，将异常存储在文件中的好处就是如果sqlserver出现异常或者网络出现异常。就无法确保将异常正常保存到数据库,
此时异常信息依然会被本地文件记录在案。对于Log4Net 这个开源库我们就不讨论其XML配置。这里着重讲解用代码如何启用Log4Net。
具体配置代码如下：
1
public
static
class
Log4netHelper
2
{
3
4
//
记录异常日志数据库连接字符串
5
private
const
string
_ConnectionString
=
@"
data source=your server;initial catalog=your db;integrated security=false;persist security info=True;User ID=sa;Password=1111
"
;
6
7
///
<summary>
8
///
使用SQLSERVER记录异常日志
9
///
</summary>
10
///
<Author>
Ryanding
</Author>
11
///
<date>
2011-05-01
</date>
12
public
static
void
LoadADONetAppender()
13
{
14
LoadFileAppender();
15
16
log4net.Repository.Hierarchy.Hierarchy hier
=
17
log4net.LogManager.GetLoggerRepository()
as
log4net.Repository.Hierarchy.Hierarchy;
18
19
if
(hier
!=
null
)
20
{
21
log4net.Appender.AdoNetAppender adoAppender
=
new
log4net.Appender.AdoNetAppender();
22
adoAppender.Name
=
"
AdoNetAppender
"
;
23
adoAppender.CommandType
=
CommandType.Text;
24
adoAppender.BufferSize
=
1
;
25
adoAppender.ConnectionType
=
"
System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
"
;
26
adoAppender.ConnectionString
=
_ConnectionString;
27
adoAppender.CommandText
=
@"
INSERT INTO Log ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)
"
;
28
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@log_date
"
, DbType
=
System.Data.DbType.DateTime, Layout
=
new
log4net.Layout.RawTimeStampLayout() });
29
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@thread
"
, DbType
=
System.Data.DbType.String, Size
=
255
, Layout
=
new
Layout2RawLayoutAdapter(
new
PatternLayout(
"
%thread
"
)) });
30
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@log_level
"
, DbType
=
System.Data.DbType.String, Size
=
50
, Layout
=
new
Layout2RawLayoutAdapter(
new
PatternLayout(
"
%level
"
)) });
31
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@logger
"
, DbType
=
System.Data.DbType.String, Size
=
255
, Layout
=
new
Layout2RawLayoutAdapter(
new
PatternLayout(
"
%logger
"
)) });
32
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@message
"
, DbType
=
System.Data.DbType.String, Size
=
4000
, Layout
=
new
Layout2RawLayoutAdapter(
new
PatternLayout(
"
%message
"
)) });
33
adoAppender.AddParameter(
new
AdoNetAppenderParameter { ParameterName
=
"
@exception
"
, DbType
=
System.Data.DbType.String, Size
=
4000
, Layout
=
new
Layout2RawLayoutAdapter(
new
ExceptionLayout()) });
34
adoAppender.ActivateOptions();
35
BasicConfigurator.Configure(adoAppender);
36
}
37
38
39
}
40
41
///
<summary>
42
///
使用文本记录异常日志
43
///
</summary>
44
///
<Author>
Ryanding
</Author>
45
///
<date>
2011-05-01
</date>
46
public
static
void
LoadFileAppender()
47
{
48
string
currentPath
=
AppDomain.CurrentDomain.BaseDirectory;
49
string
txtLogPath
=
string
.Empty;
50
string
iisBinPath
=
AppDomain.CurrentDomain.RelativeSearchPath;
51
52
if
(
!
string
.IsNullOrEmpty(iisBinPath))
53
txtLogPath
=
Path.Combine(iisBinPath,
"
ErrorLog.txt
"
);
54
else
55
txtLogPath
=
Path.Combine(currentPath,
"
ErrorLog.txt
"
);
56
57
log4net.Repository.Hierarchy.Hierarchy hier
=
58
log4net.LogManager.GetLoggerRepository()
as
log4net.Repository.Hierarchy.Hierarchy;
59
60
FileAppender fileAppender
=
new
FileAppender();
61
fileAppender.Name
=
"
LogFileAppender
"
;
62
fileAppender.File
=
txtLogPath;
63
fileAppender.AppendToFile
=
true
;
64
65
PatternLayout patternLayout
=
new
PatternLayout();
66
patternLayout.ConversionPattern
=
"
记录时间：%date 线程ID:[%thread] 日志级别：%-5level 出错类：%logger property:[%property{NDC}] - 错误描述：%message%newline
"
;
67
patternLayout.ActivateOptions();
68
fileAppender.Layout
=
patternLayout;
69
70
//
选择UTF8编码，确保中文不乱码。
71
fileAppender.Encoding
=
Encoding.UTF8;
72
73
fileAppender.ActivateOptions();
74
BasicConfigurator.Configure(fileAppender);
75
76
}
77
78
///
<summary>
79
///
异常处理
80
///
</summary>
81
///
<param name="methedType">
出现异常方法的类型。例如：MethodBase.GetCurrentMethod().DeclaringType
</param>
82
///
<param name="errorMsg">
错误信息。例如：SaveBuildingPhoto方法出错。Author:开发者名称
</param>
83
///
<param name="ex"></param>
84
public
static
void
InvokeErrorLog(Type methedType,
string
errorMsg, Exception ex)
85
{
86
LoadADONetAppender();
87
ILog log
=
log4net.LogManager.GetLogger(methedType);
88
log.Info(errorMsg, ex);
89
}
90
}
在您的数据库执行以下脚本：
SET
ANSI_NULLS
ON
GO
SET
QUOTED_IDENTIFIER
ON
GO
IF
NOT
EXISTS
(
SELECT
*
FROM
sys.objects
WHERE
object_id
=
OBJECT_ID
(N
'
[dbo].[Log]
'
)
AND
type
in
(N
'
U
'
))
BEGIN
CREATE
TABLE
[
dbo
]
.
[
Log
]
(
[
Id
]
[
int
]
IDENTITY
(
1
,
1
)
NOT
NULL
,
[
Date
]
[
datetime
]
NOT
NULL
,
[
Thread
]
[
varchar
]
(
255
)
NULL
,
[
Level
]
[
varchar
]
(
50
)
NULL
,
[
Logger
]
[
varchar
]
(
255
)
NULL
,
[
Message
]
[
varchar
]
(
4000
)
NULL
,
[
Exception
]
[
varchar
]
(
4000
)
NULL
,
PRIMARY
KEY
CLUSTERED
(
[
Id
]
ASC
)
WITH
(PAD_INDEX
=
OFF
, IGNORE_DUP_KEY
=
OFF
)
ON
[
PRIMARY
]
)
ON
[
PRIMARY
]
END
Go
调用如下：
1
public
bool
Login(
string
userName,
string
password)
2
{
3
try
4
{
5
//
TODO:
6
7
}
8
catch
(Exception ex)
9
{
10
Log4netHelper.InvokeErrorLog(MethodBase.GetCurrentMethod().DeclaringType,
"
登录方法Login出错-Author：ryanding
"
, ex);
11
return
false
;
12
}
13
}
作者：RyanDing
出处：http://www.cnblogs.com/ryanding/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。如有疑问，可以通过 [email protected] 联系作者本人。
分类:
.NET Framework