Enterprise Library 2.0 -- Logging Application Block（下）

Enterprise Library 2.0 -- Logging Application Block（下）2010-05-15 cnblogs pw Daniel Pang阅读本文之前,请先阅读:Enterprise Library 2.0 -- Logging Application Block （上）

上一篇中我们介绍了如何去配置Logging Application Block,本文将主要介绍Logging Application Block 的基本操作以及Formatter和Trace Listeners 的自定义方法，首先我们来看如何将一个事件日志写入到一个文本文件中。

假设我们按照上一篇的操作配置了Logging Application Block，那么配置文件中的信息如下：

<loggingConfiguration name="Logging Application Block" tracingEnabled="true"
  defaultCategory="General" logWarningsWhenNoCategoriesMatch="true">
  <listeners>
   <add fileName="trace.log" header="----------------------------------------"
    footer="----------------------------------------" formatter="SHY520 Formatter"
    listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FlatFileTraceListenerData,

Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
    traceOutputOptions="None" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FlatFileTraceListener,

Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
    name="SHY520 Listeners" />
   <add source="Enterprise Library Logging" formatter="Text Formatter"
    log="Application" machineName="" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.FormattedEventLogTraceListenerData,

Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
    traceOutputOptions="None" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.FormattedEventLogTraceListener,

Microsoft.Practices.EnterpriseLibrary.Logging, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null"
    name="Formatted EventLog TraceListener" />
  </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="Text Formatter" />
   <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="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 &amp; Warnings">
    <listeners>
     <add name="Formatted EventLog TraceListener" />
    </listeners>
   </errors>
  </specialSources>
 </loggingConfiguration>