为程序添加log日志

<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" />
      <section name="errorTweet" requirePermission="false" type="Elmah.ErrorTweetSectionHandler, Elmah" />
    </sectionGroup>
 <httpModules>
      <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" />
      <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" />
      <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" />
      <add name="ErrorTweet" type="Elmah.ErrorTweetModule, Elmah" />
      <add name="Glimpse" type="Glimpse.AspNet.HttpModule, Glimpse.AspNet" />
    </httpModules>

<modules runAllManagedModulesForAllRequests="true">
      <remove name="UrlRoutingModule-4.0" />
      <add name="UrlRoutingModule-4.0" type="System.Web.Routing.UrlRoutingModule" />
      <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah" preCondition="managedHandler" />
      <add name="ErrorMail" type="Elmah.ErrorMailModule, Elmah" preCondition="managedHandler" />
      <add name="ErrorFilter" type="Elmah.ErrorFilterModule, Elmah" preCondition="managedHandler" />
      <add name="ErrorTweet" type="Elmah.ErrorTweetModule, Elmah" preCondition="managedHandler" />
      <add name="Glimpse" type="Glimpse.AspNet.HttpModule, Glimpse.AspNet" preCondition="integratedMode" />
    </modules>

<elmah>    
    <security allowRemoteAccess="false" />
    <!--三种存储方式：内存、xml、数据库。存储到xml里面格式如下行-->
    <errorLog type="Elmah.XmlFileErrorLog, Elmah" logPath="~/Static/Log/" />
    <!--<errorLog type="Elmah.OracleErrorLog, Elmah" connectionStringName="DefaultConnection" />-->
    <errorFilter>
      <!--<test>
        <and>
          -->
      <!--排除404 error-->
      <!--
          <equal binding="HttpStatusCode" value="404" type="Int32" />
        </and>
      </test>-->
    </errorFilter>
    <errorTweet maxStatusLength="100" url="https://slack.com/api/chat.postMessage" formFormat="token=xoxp-9404739216-9405040759-12378018532-7808a2aedc&amp;channel=#nawf&amp;text={0}&amp;username=elmah" />
  </elmah>
  <location path="log.axd" inheritInChildApplications="false">
    <system.web>
      <httpHandlers>
        <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" />
      </httpHandlers>
      <!-- 
        See http://code.google.com/p/elmah/wiki/SecuringErrorLogPages for 
        more information on using ASP.NET authorization securing ELMAH.

      <authorization>
        <allow roles="admin" />
        <deny users="*" />  
      </authorization>
      -->
    </system.web>
    <system.webServer>
      <handlers>
        <add name="ELMAH" verb="POST,GET,HEAD" path="log.axd" type="Elmah.ErrorLogPageFactory, Elmah" preCondition="integratedMode" />
      </handlers>
    </system.webServer>

 

引用elmah插件

nuget包里找到elmah安装 ，然后webconfig里配置