数据库日志(转)
一、 根据Enterprise Library 2.0中将日志写入到数据库中的需要,我们在数据库中添加一张记录日志的表(RX_Log):
create table RX_Log
(
id int identity not null, --流水号
EventId int null, --事件ID
Priority int null, --优先级
Category varchar(1000) null, --类别
Title varchar(500) null, --日志标题
Message varchar(1000) null, --日志信息
Machine varchar(100) null, --主机名
Timestamps smalldatetime null, --记录时间
Severity varchar(100) null, --严重级别
ApplicationDomain varchar(1000) null, --应用程序名
ProcessId int null, --进程ID
ProcessName varchar(500) null, --进程名
Win32ThreadId int null, --线程ID
ThreadName varchar(500) null, --线程名
ExtendedProperties varchar(1000) null, --扩展信息
primary key(id)
)
Logging Application Block 在写日志到数据库的过程中,还需要两个存储过程(注意:这也是和1.0的一点小区别,上一个版本只需要一个存储过程),分别为:
--写日志
create procedure usp_writelogtodatabase
(
@EventId int,
@Priority int,
@Title varchar(500),
@Message varchar(4000),
@machineName varchar(100),
@Timestamp smalldatetime,
@Severity varchar(100),
@AppDomainName varchar(1000),
@ProcessId int,
@ProcessName varchar(500),
@Win32ThreadId int,
@ThreadName varchar(500),
@formattedmessage varchar(4000),
@LogId int out
)
as
begin
insert into RX_Log
(
EventId,
Priority,
Title,
Message,
Machine,
Timestamps,
Severity,
ApplicationDomain,
ProcessId,
ProcessName,
Win32ThreadId,
ThreadName,
ExtendedProperties
)
values
(
@EventId,
@Priority,
@Title,
@Message,
@machineName,
@Timestamp,
@Severity,
@AppDomainName,
@ProcessId,
@ProcessName,
@Win32ThreadId,
@ThreadName,
@formattedmessage
)
set @LogId=@@identity
end
--设置日志类别
create procedure usp_addcategory
(
@categoryName varchar(1000),
@logID int
)
as
begin
UPDATE RX_Log SET Category=@categoryName WHERE ID=@logID
end
上面的工作做好之后,我们在来配置我们的配置文件,首先我们需要添加一个DataBase的Trace Listener,如下图:
然后指定一些该Trace Listener的属性,包括AddCategoryStoreProcedure,DataBaseInstance,Formatter,Name,TraceOutputOptions以及WriteLogStoreProcedure。
其中AddCategoryStoredProcedure和WriteLogStoredProcedureName就是我们刚刚在数据库中建的存储过程,前者是设置日志类别,后者为向数据库中插入日志的存储过程。DataBaseInstance是我们在Data Access Application Block中建立的一个数据库实例,具体方法可以参考:
Enterprise Library 2.0 -- Data Access Application Block,Formatter则是我们选择上篇文章中设置的SHY520 Formatter,具体的配置方法请参考:
Enterprise Library 2.0 -- Logging Application Block (上)
Enterprise Library 2.0 -- Logging Application Block (下)
其他选项我们先保持默认,接着我们需要添加一个Category,命名为DataBase
然后为这个Category添加一个Trace Listener,并设置其RefrencedTraceListener为我们刚刚建的Database Trace Listener,
这样就完成了我们的配置工作,此时你的配置文件中(Web.Config或App.Config)应该会包含下面的信息:
<configuration>
<configSections>
<section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
<section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" />
</configSections>
<loggingConfiguration name="Logging Application Block" tracingEnabled="true"
defaultCategory="General" logWarningsWhenNoCategoriesMatch="true">
<listeners>
<add databaseInstanceName="Connection String" writeLogStoredProcName="usp_writelogtodatabase"
addCategoryStoredProcName="usp_addcategory" formatter="SHY520 Formatter"
listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Database.Configuration.FormattedDatabaseTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
traceOutputOptions="None" type="Microsoft.Practices.EnterpriseLibrary.Logging.Database.FormattedDatabaseTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
name="Database Trace Listener" />
</listeners>
<formatters>
<add template="Timestamp: {timestamp} Message: {message} Category: {category} Priority: {priority} EventId: {eventid} Severity: {severity} Title:{title} Machine: {machine} Application Domain: {appDomain} Process Id: {processId} Process Name: {processName} Win32 Thread Id: {win32ThreadId} Thread Name: {threadName} Extended Properties: {dictionary({key} - {value} )}"
type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
name="SHY520 Formatter" />
</formatters>
<logFilters>
<add categoryFilterMode="AllowAllExceptDenied" type="Microsoft.Practices.EnterpriseLibrary.Logging.Filters.CategoryFilter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
name="Category Filter" />
</logFilters>
<categorySources>
<add switchValue="All" name="DataBase">
<listeners>
<add name="Database Trace Listener" />
</listeners>
</add>
<add switchValue="All" name="General">
<listeners>
<add name="SHY520 Listeners" />
</listeners>
</add>
</categorySources>
<specialSources>
<allEvents switchValue="All" name="All Events" />
<notProcessed switchValue="All" name="Unprocessed Category" />
<errors switchValue="All" name="Logging Errors & Warnings">
<listeners>
<add name="Formatted EventLog TraceListener" />
</listeners>
</errors>
</specialSources>
</loggingConfiguration>
<dataConfiguration defaultDatabase="Connection String" />
<connectionStrings>
<add name="Connection String" connectionString="Database=EnterpriseLibrary;Server=shy;Integrated Security=SSPI;uid=sa;pwd=;"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
上面的工作做完之后,我们就可以在应用程序中添加代码,用于将日志写入数据库了,如下:
public void LogToDataBase()
{
LogEntry log = new LogEntry();
//事件ID
log.EventId = 2000;
//日志优先级
log.Priority = 2;
log.Message = "Test Log Information To DataBase";
//日志类别
ICollection<string> coll = new List<string>();
//设置类别为DataBase,这就确定了你的日志是写入到数据库的
//因为DataBase这个类别中包含一个DataBase Trace Listener
coll.Add("DataBase");
log.Categories = coll;
//添加额外信息
Dictionary<string, object> dic = new Dictionary<string, object>();
dic.Add("name", "SHY520");
dic.Add("sex","男");
dic.Add("age", "22");
log.ExtendedProperties = dic;
//写入日志
Logger.Write(log);
}
运行这个测试方法,然后到数据库中看一下,此时上面的一条日志信息已经写入到数据库中了,关于利用Logging Application Block写日志到数据库中的方法就说到这里,如有遗漏,错误的地方,欢迎您指正!
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