Enterprise Library 2.0 Logging Application Block日志组件使用除错笔记（“Microsoft.Practices.EnterpriseLibrary.Logging.Logger”的类型初始值设定项引发异常。 ）

http://davidhayden.com/blog/dave/archive/2006/02/15/2802.aspx

参考这篇文章配置Logging Application Block 的web.config如下：

<?xml version="1.0" encoding="utf-8"?>
<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 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" />
      <add fileName="bin\trace.log" header="----------------------------------------"
        footer="----------------------------------------" formatter="PFPMIS Text 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="PFPMIS FlatFile 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="PFPMIS 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="Text Formatter" />
    </formatters>
    <categorySources>
      <add switchValue="All" name="Category" />
      <add switchValue="All" name="General">
        <listeners>
          <add name="PFPMIS FlatFile TraceListener" />
        </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>

但是执行int error = Int32.Parse("bbbbb");
这句代码后trace.log 文件总为空，跟踪了一下，报下面这个异常：

“Microsoft.Practices.EnterpriseLibrary.Logging.Logger”的类型初始值设定项引发异常。 


发现少了这几个dll,Microsoft.Practices.EnterpriseLibrary.Common.dll,
Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.dll,
Microsoft.Practices.ObjectBuilder.dll
赶快找来引用上，当然
Microsoft.Practices.EnterpriseLibrary.Logging.dll 这个dll是必不可少的。
执行一下，OK,打开trace.log 看到如下记录结果：

 
----------------------------------------
Timestamp: 2007-2-5 2:33:43
Message: 输入字符串的格式不正确。
SOURCE: mscorlib
FORM:
QUERYSTRING:
TARGETSITE: Void StringToNumber(System.String, System.Globalization.NumberStyles, NumberBuffer ByRef, System.Globalization.NumberFormatInfo, Boolean)
STACKTRACE:    在 System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
   在 System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
   在 System.Int32.Parse(String s)
   在 PFPMIS.Web.Index.WebForm1.Page_Load(Object sender, EventArgs e) 位置 H:\NewMis\Index\WebForm1.aspx.cs:行号 18
   在 System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
   在 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
   在 System.Web.UI.Control.OnLoad(EventArgs e)
   在 System.Web.UI.Control.LoadRecursive()
   在 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Category: General
Priority: -1
EventId: 1
Severity: Information
Title:
Machine: XXZX-FNQF3DEF5X
Application Domain: b830af7a-3-128151164023437500
Process Id: 5320
Process Name: C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\WebDev.WebServer.exe
Win32 Thread Id: 4556
Thread Name:
Extended Properties:
----------------------------------------

需要注意的是，如果忘记给track.log文件赋予asp.net用户写权限的话，将不会记录日志，而且不会报任何异常,在windows 2003 server下是给network service用户赋予写权限.

希望对使用Enterprise Library 2.0 Logging Application Block日志组件记录日志的朋友有所帮助