【发布时间】：2016-07-26 15:23:15
【问题描述】：
我的任务是编写一个 c# 表单应用程序来：
- 显示可安装 NLog 的可用网站的 DDL（基于我们的内部标准）
- 安装支持 NLog 所需的文件 我有具有 NLog 功能的工作站点（我没有编写），我将其用作开始的基础。 Global.asax 和 App_Code/LogManager.vb 之间存在一些连接/交互，以将错误引导到 NLog。我没有写那部分，所以我认为这可能是问题所在，因为我不知道它们如何交互......
这是供我们的实施工程师用作部署工具的。
（注意：此应用程序是 C#，但目标网站始终是 VB 我们的生态系统）
正在复制的文件：
- bin/NLog.dll
- bin/NLog.Extended.dll
- Global.asax
- NLog.config
- App_Code/LogManager.vb
在我们的 Global.asax 中，我们正在捕获如下错误：
Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
' Code that runs when an unhandled error occurs
Dim lastException As Exception = Server.GetLastError()
HandleError(lastException)
End Sub
Public Shared Sub HandleError(ex As Exception)
'Honor the config setting for whether we should do the logging.
Dim hostId As String = ""
If HttpContext.Current IsNot Nothing AndAlso HttpContext.Current.Request IsNot Nothing Then
hostId = " (" + HttpContext.Current.Request.Url.Host + ")"
End If
If ex Is Nothing Then
'OrElse request.Url.Host.ToLower = "localhost" Then
Return
End If
If ShouldLogError(ex) Then
Dim LogManager As New LogManager()
LogManager.Logger.LogError("Global Exception",ex)
End If
End Sub
Protected Shared Function ShouldLogError(ex As Exception) As Boolean
If TypeOf ex Is System.Web.HttpRequestValidationException Then
Return False
End If
If TypeOf ex Is HttpException Then
Dim exHttp As HttpException = DirectCast(ex, HttpException)
Select Case exHttp.GetHttpCode()
Case 404
'File Not Found
Return False
End Select
End If
If TypeOf ex Is System.IO.FileNotFoundException Then
Return False
End If
If TypeOf ex.InnerException Is System.IO.FileNotFoundException Then
Return False
End If
If TypeOf ex Is System.Reflection.TargetInvocationException OrElse TypeOf ex Is System.FormatException OrElse (TypeOf ex Is HttpException AndAlso ex.Message.Contains("Invalid viewstate.")) OrElse TypeOf ex Is System.Security.Cryptography.CryptographicException Then
If HttpContext.Current.Request.Url.AbsolutePath.EndsWith("ScriptResource.axd", StringComparison.OrdinalIgnoreCase) OrElse HttpContext.Current.Request.Url.AbsolutePath.EndsWith("WebResource.axd", StringComparison.OrdinalIgnoreCase) Then
Return False
End If
End If
Return True
End Function
在 LogManager.vb 中：
Public Class LogManager
Private _Logger As ILogger
Public Sub New()
End Sub
Public ReadOnly Property Logger As ILogger
Get
If _Logger Is Nothing Then
_Logger = New LoggerFactory().CreateLoggerNlog("Website")
End If
Return _Logger
End Get
End Property
End Class
和 NLog.config：
<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<extensions>
<add assembly="OURDOMAINlibrary"/>
<!--<add assembly="NLog.Extended"/>-->
</extensions>
<targets async="false">
<target xsi:type="Console" name="debugConsole" layout="${VnEventId:brackets=true} ${uppercase:${level}} ${LoggerFriendly} ${message} "/>
</targets>
<targets async="true">
<target xsi:type="File" name="debugFile" createDirs="true" fileName="c:/Vendornet/Log/${iis-site-name}}/${iis-site-name}_${shortdate}.log" layout="${longdate} ${VnEventId:brackets=true} ${uppercase:${level}} ${LoggerFriendly} ${message}"/>
<!-- Alter the smtpServer and to attributes only. For information regarding the ${FatalEmail} tag, see
the documentation provided with this project
-->
<target name="mail" xsi:type="Mail" html="true" replaceNewlineWithBrTagInHtml="true" smtpServer="OURDOMAIN" smtpAuthentication="None" to="${FatalEmail:DL-OURDOMAIN-ImpDev@OURDOMAIN.com;me@OURDOMAIN.com}" from="${machinename}@OURDOMAIN.com" subject="${iis-site-name} - ${processname} has FAILED on ${machinename}." body="${message}"/>
<!-- The Webservice Target Below should not be modified except for the url attribute. To disable this target
set the minlevel in the Rules section to Off. Otherwise set it to Trace or higher
-->
<target type="WebService" name="vnLogApi" url="http://OURDOMAIN/api/log" protocol="HttpPost" encoding="UTF-8">
<parameter name="time_stamp" type="System.String" layout="${date}"/>
<parameter name="level" type="System.String" layout="${level}"/>
<parameter name="logger" type="System.String" layout="${logger}"/>
<parameter name="userName" type="System.String" layout="${identity}"/>
<parameter name="url" type="System.String" layout="${aspnet-request:serverVariable=Url}"/>
<parameter name="machineName" type="System.String" layout="${machinename}"/>
<parameter name="sessionId" type="System.String" layout="${aspnet-sessionid}"/>
<parameter name="threadId" type="System.String" layout="${threadid}"/>
<parameter name="referrer" type="System.String" layout="${aspnet-request:serverVariable=HTTP_REFERER}"/>
<parameter name="userAgent" type="System.String" layout="${aspnet-request:serverVariable=HTTP_USER_AGENT}"/>
<parameter name="code" type="System.String" layout="${CUSTOMEventId}"/>
<parameter name="message" type="System.String" layout="${message}"/>
<parameter name="version" type="System.String" layout=""/>
<parameter name="exception" type="System.String" layout="${exception}"/>
<parameter name="stackTrace" type="System.String" layout="${stacktrace}"/>
<parameter name="clientName" type="System.String" layout="${iis-site-name}"/>
<parameter name="fileName" type="System.String" layout="${iis-site-name} ${date}"/>
</target>
</targets>
<rules>
<logger name="*" minlevel="Trace" writeTo="debugConsole"/>
<logger name="*" minlevel="Trace" writeTo="debugFile"/>
<!-- SET TO Trace or Higher Once LogAPI is available for this server -->
<logger name="*" minlevel="Trace" writeTo="vnLogApi"/>
<!-- THIS LINE SHOULD NOT BE MODIFIED -->
<logger name="*" minlevel="Fatal" writeTo="mail"/>
</rules>
因此，即使使用最精简的 NLog.config，它也不会输出任何内容...尝试了一个简单的日志文件、webservice 邮件...什么也没有。我尝试了几个地方来触发错误，但命名一个 var 错误，缺少一个 conn.open 等，但无济于事......
我还尝试绕过对“ShouldLogError()”的检查，以确保它会触发但不会执行。
需要什么其他文件或调整才能让 NLog 以这种方式工作？
【问题讨论】：
标签： c# asp.net vb.net winforms nlog