elmah与customErrors不通过电子邮件，除非它是404

Question

我正在玩Elmah，看看我是否想用它作为我的错误处理解决方案。我安装了它，硬编码了一个例外到我的页面，击中页面wholla！得到我的电子邮件，一切都很开心。但是，当我将customError节点添加到我的web.config中以重定向到友好的错误页面时，该电子邮件未发送，但我被重定向到友好的错误页面。

奇怪的是，当我浏览到不上我的网站存在的页面时，我被重定向到家里（我在的customErrors设置），但我没有收到邮件......这可能是问题，因为我不当人们击中我的网站并在网址末尾添加“whatever.php”时，我们不想收到十亿封电子邮件。

所以我有两个问题：1）为什么会被抛出的异常不会给我发电子邮件和2）我怎么能告诉Elmah不要给我发送404s的电子邮件？

Answer 1

你可以在你的Global.asax.cs筛选与像这样的事情ELMAH：

//ELMAH Filtering 
    protected void ErrorLog_Filtering(object sender, ExceptionFilterEventArgs e) 
    { 
     FilterError404(e); 
    } 

    protected void ErrorMail_Filtering(object sender, ExceptionFilterEventArgs e) 
    { 
     FilterError404(e); 
    } 

    //Dimiss 404 errors for ELMAH 
    private void FilterError404(ExceptionFilterEventArgs e) 
    { 
     if (e.Exception.GetBaseException() is HttpException) 
     { 
      HttpException ex = (HttpException)e.Exception.GetBaseException(); 

      if (ex.GetHttpCode() == 404) 
      { 
       e.Dismiss(); 
      } 
     } 
    } 

所以调用FilterError404添加到过滤的任何部分。上面的例子将会为ErrorLog和Email两个过滤器404。另外，请查阅： http://code.google.com/p/elmah/wiki/ErrorFiltering

你也可以做筛选按来源为链接描述：

<elmah> 
    ... 
    <errorFilter> 
     <test> 
      <and> 
       <equal binding="HttpStatusCode" value="404" type="Int32" /> 
       <regex binding="FilterSourceType.Name" pattern="mail" /> 
      </and> 
     </test> 
    </errorFilter> 
</elmah> 

检查web.config中：

<?xml version="1.0" encoding="UTF-8"?> 
<!-- 
    Note: As an alternative to hand editing this file you can use the 
    web admin tool to configure settings for your application. Use 
    the Website->Asp.Net Configuration option in Visual Studio. 
    A full list of settings and comments can be found in 
    machine.config.comments usually located in 
    \Windows\Microsoft.Net\Framework\v2.x\Config 
--> 
<configuration> 
    <configSections> 
    <sectionGroup name="elmah"> 
     <section name="security" requirePermission="false" type="Elmah.SecuritySectionHandler, Elmah" /> 
     <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah" /> 
     <section name="errorMail" requirePermission="false" type="Elmah.ErrorMailSectionHandler, Elmah" /> 
     <section name="errorFilter" requirePermission="false" type="Elmah.ErrorFilterSectionHandler, Elmah" /> 
    </sectionGroup> 
    </configSections> 
    <appSettings /> 
    <!-- ELMAH: Configuration --> 
    <elmah> 
    <security allowRemoteAccess="1" /> 
    <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="Elmah.Sql" /> 
    <errorMail defaultCredentials="true" from="someuser@example.com" to="someuser@example.com, someuser2@example.com" subject="Error (STAGING): {0}" async="true" smtpPort="25" smtpServer="192.168.1.1" userName="smtpUserName" password="smtpPassword" /> 
    </elmah> 
    <connectionStrings> 
    <add name="Elmah.Sql" connectionString="Data Source=192.168.1.1;database=DBName;integrated security=false;User ID=MyUserName;Password=MyPassword" /> 
    </connectionStrings> 
    <system.net> 
    <mailSettings> 
     <smtp deliveryMethod="Network" from="someuser@example.com"> 
     <network defaultCredentials="true" host="192.168.1.1" port="25" userName="smtpUserName" password="smtpPassword" /> 
     </smtp> 
     <!-- Use this setting for development 
     <smtp deliveryMethod="SpecifiedPickupDirectory"> 
     <specifiedPickupDirectory pickupDirectoryLocation="C:\Temp" /> 
     </smtp> 
     --> 
    </mailSettings> 
    </system.net> 
    <system.web> 
    <!-- 
      Set compilation debug="true" to insert debugging 
      symbols into the compiled page. Because this 
      affects performance, set this value to true only 
      during development. 
    --> 
    <compilation debug="true"> 
     <assemblies> 
     ........................... 
     </assemblies> 
    </compilation> 

     ....................... 
    <!-- 
      The <customErrors> section enables configuration 
      of what to do if/when an unhandled error occurs 
      during the execution of a request. Specifically, 
      it enables developers to configure html error pages 
      to be displayed in place of a error stack trace. 
     --> 
    <customErrors mode="RemoteOnly" defaultRedirect="~/Home/MyErrorPage" /> 
    ............................. 
    <httpHandlers> 
     .............................. 
     <!--ELMAH--> 
     <add verb="POST,GET,HEAD" path="/MyErrorPage/elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" /> 
    </httpHandlers> 
    <httpModules> 
    ........................ 
     <!-- ELMAH: Logging module --> 
     <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" /> 
     <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" /> 
    </httpModules> 
    </system.web> 

    <system.webServer> 
    <validation validateIntegratedModeConfiguration="false" /> 
    <modules runAllManagedModulesForAllRequests="true"> 
    ............................. 
    <!-- ELMAH--> 
     <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" /> 
     <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" /> 
     <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" /> 
    </modules> 
    <handlers> 
    .............. 
     <!--ELMAH--> 
     <add name="Elmah" verb="POST,GET,HEAD" path="/MyErrorPage/elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" /> 
    </handlers> 
    </system.webServer> 
.................. 
</configuration> 

供参考：NuGet包也可作为解释作者：Scott Hanselman： http://www.hanselman.com/blog/NuGetPackageOfTheWeek7ELMAHErrorLoggingModulesAndHandlersWithSQLServerCompact.aspx