Intercept elmah logging ASP.NET MVC

Question

I would like to try to intercept and do some other processing ( export a database ) when elmah raises an error.Is there a way to do that?

Answer 1

ELMAH exposes two events in order to do this: ErrorLog_Filtering and ErrorLog_Logged. ErrorLog_Filtering is called just before logging to the configured error log and ErrorLog_Logged is called just after. You will find documentation about error filtering on the ELMAH site. ErrorLog_Logged isn't really documented, but you can see an example of it in this article: Logging to multiple ELMAH logs.

With that said, you probably don't want to execute any long running tasks as part of ErrorLog_Logged and ErrorLog_Filtering. It will slow down your system. I'm not sure on what you are trying to achieve here by exporting a database on every error?

Answer 2

Yes there is way around

1.Lets Create a Project Name ElmahMvc

2.Install nuget package nuget

Install-Package Elmah.MVC

3. Raise an Exception .There you go access error log by your local url/elmah

http://localhost:20351/elmah

The saving database and Emailing is bit of configuration to take ....

Lets look at it

1.Download ELMAH script form official site

ELMAH

2.add a database named log and run the script

3.add a connection string in web.config

  <connectionStrings>
    <add name="elmah" connectionString="Data Source=.;Initial Catalog=log;Persist Security Info=True;User ID=sa;Password=pass" providerName="System.Data.SqlClient" />
  </connectionStrings>

4.Add a elmah element in web.config

  <elmah>

    <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="elmah" /> 
   <!--For Addtional Mail Config .Remove it if not need for mail on every error-->
    <errorMail from="waltoncrm@waltonbd.com"
           to="mrahman.cse32@waltonbd.com"

           subject="Application Exception"
           async="false"
           smtpPort="25"
           smtpServer="YourServer"
           userName="uName"
           password="pass">
    </errorMail>
  </elmah>

and mail additional

under System.WebServer

<system.net>
    <mailSettings>
      <smtp deliveryMethod ="Network">
        <network host="smtp.gmail.com" port="587" userName="yourgmailEmailAddress"   password="yourGmailEmailPassword" />
      </smtp>
    </mailSettings>
  </system.net>

Download my sample project and Elmah script with Visual Studio 2013 akash365.com

Note:if you donot want to crash your program or use it in asp.net web form Static [WebMethod] This seems perfect

try 
{
    //some web method code 
}
catch(Exception ex)
{
    Elmah.ErrorSignal.FromCurrentContext().Raise(ex);
}