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