这里只是说明在项目中如何配置使用微软企业库的日志组件，对数据库方面的配置请参考其他资料。
1、在项目中添加Microsoft.Practices.EnterpriseLibrary.Data.dll、Microsoft.Practices.EnterpriseLibrary.Logging.dll、Microsoft.Practices.EnterpriseLibrary.Logging.Database.dll这三个引用。
2、打开EnterpriseLibrary的配置工具EntLibConfig.exe
1）选择菜单“Block->Add Logging Setting"
2）点击“+”号添加Logging Target Listeners，选择Add Database Trace Listener
3、设置Database Trace Listener中的参数，比如数据库连接、插入日志存储过程、插入分类存储过程、选择文本格式等
4、设置Database Setting中的“Connection String”中的数据库连接
5、最后保存配置文件到项目路径中。
设置后的配置文件：
<configuration><configSections><section name="loggingConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.LoggingSettings, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" /><section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="true" /></configSections><loggingConfiguration name="" tracingEnabled="true" defaultCategory="General"><listeners><add name="Event Log Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FormattedEventLogTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FormattedEventLogTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"source="Enterprise Library Logging" formatter="Text Formatter"log="" machineName="." traceOutputOptions="None" /><add name="Database Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.Database.FormattedDatabaseTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Database.Configuration.FormattedDatabaseTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging.Database, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"databaseInstanceName="Connection String" writeLogStoredProcName="EL_WRITELOG"addCategoryStoredProcName="EL_ADDCATEGORY" formatter="Text Formatter" /><add name="XML Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.XmlTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.XmlTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"fileName="test.xml" /></listeners><formatters><add type="Microsoft.Practices.EnterpriseLibrary.Logging.Formatters.TextFormatter, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"template="<TIMESTAMP> {timestamp}</TIMESTAMP> {newline}
<MESSAGE> {message}</MESSAGE>{newline}
<CATEGORY>{category}</CATEGORY>{newline}
<PRIORITY>{priority}</PRIORITY>{newline}
<EVENTID>{eventid}</EVENTID>{newline}
<SEVERITY>{severity}</SEVERITY>{newline}
<TITLE>{title}</TITLE>{newline}
<MACHINE>{localMachine}</MACHINE>{newline}
<APP DOMAIN> {localAppDomain}</APP DOMAIN>{newline}
<PROCESSID>{localProcessId}</PROCESSID>{newline}
<PROCESS NAME> {localProcessName}</PROCESS NAME> {newline}
<THREAD NAME> {threadName}</THREAD NAME>{newline}
<WIN32 THREADID>{win32ThreadId}</WIN32 THREADID>{newline}
<EXTENDED PROPERTIES> {dictionary(<KEY>{key}</KEY> - <VALUE>{value}</VALUE>{newline})}</EXTENDED PROPERTIES>"name="Text Formatter" /></formatters><categorySources><add switchValue="All" name="General"><listeners><add name="Database Trace Listener" /><add name="XML Trace Listener" /></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="Database Trace Listener" /><add name="XML Trace Listener" /></listeners></errors></specialSources></loggingConfiguration><dataConfiguration defaultDatabase="Connection String" /><connectionStrings><add name="Connection String" connectionString="DATA SOURCE=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)))(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = eifoclog)));PERSIST SECURITY INFO=True;USER ID=FOC;Password=foc"providerName="System.Data.OracleClient" /></connectionStrings></configuration>
需要注意的是：
在工具中只能选一个监听器，但实际可以有多个监听器同时监听。
<categorySources>
<add switchValue="All" name="General">
<listeners>
<add name="Database Trace Listener" />
<add name="XML Trace Listener" />
</listeners>
</add>
</categorySources>
在项目中使用：
class Program{static void Main(string[] args){LogEntry logEntry = new LogEntry();logEntry.EventId = 1;logEntry.Priority = 1;logEntry.Severity = System.Diagnostics.TraceEventType.Error;logEntry.Title = "标题";logEntry.Message = "test";logEntry.Categories.Add("C#学习");logEntry.Categories.Add("Microsoft Enterprise Library学习");Logger.Writer.Write(logEntry, "General");Console.WriteLine("日志写入完成!");}}
本文参考博客地址：/huangcong/archive//06/04/1751087.html
示例代码地址：/qiu/ConsoleApplication1.zip
