ELMAHError Logging Modules And

Handler

Presenter: Harsh Wardhan, Mindfire SolutionsDate: 08/07/2015

Presenter: Harsh Wardhan, Mindfire Solutions

Agenda

- Importance of error logging.- Introducing ELMAH.- Installing and configuring ELMAH.- Best practices.

Presenter: Harsh Wardhan, Mindfire Solutions

Importance of error logging

Helps in tracking bug. Helps to evaluate application health. Organised logs save development time.

Presenter: Harsh Wardhan, Mindfire Solutions

Introducing ELMAH

Stands for Error Logging Modules And Handlers.

An open source project created by Atif Aziz.

Completely pluggable. Logs nearly all unhandled exceptions. Provides a web page to display all the

logged errors.

Presenter: Harsh Wardhan, Mindfire Solutions

Introducing ELMAH

Provides e-mail, twitter notification for all the errors as they occur.

RSS feed of last 15 errors logged. Provides different log storing options

including in-memory, SQL Server, SQLite.

Presenter: Harsh Wardhan, Mindfire Solutions

Installing ELMAH

Adding ELMAH assembly.Just drop the dll on your application's bin folder.ORInstall ELMAH NuGet package.

Presenter: Harsh Wardhan, Mindfire Solutions

Configuring ELMAH

Adding a section group which has information on how to log exceptions.

Adding a http module to log exception. Adding a http handler to view exception. Elmah section to set the logger type and

other settings.

Presenter: Harsh Wardhan, Mindfire Solutions

Configuring ELMAH

Adding a section group which has information on how to log exceptions.

<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>

Presenter: Harsh Wardhan, Mindfire Solutions

Configuring ELMAH

Adding a http module to log exception.

<system.webServer> <validation validateIntegratedModeConfiguration="false"/> <modules> <add name="Elmah.ErrorLog" type="Elmah.ErrorLogModule, Elmah" preCondition="managedHandler" /> </modules> <handlers> <add name="Elmah" path="elmah.axd" verb="POST,GET,HEAD" type="Elmah.ErrorLogPageFactory, Elmah" preCondition="integratedMode" /> </handlers> </system.webServer>

Presenter: Harsh Wardhan, Mindfire Solutions

Configuring ELMAH

Adding a http handler to view exception. <system.web> <httpHandlers> <add verb="POST,GET,HEAD" path="elmah.axd" type="Elmah.ErrorLogPageFactory, Elmah" /> </httpHandlers> <httpModules> <add name="ErrorLog" type="Elmah.ErrorLogModule, Elmah"/> </httpModules> </system.web>

Presenter: Harsh Wardhan, Mindfire Solutions

Configuring ELMAH

Elmah section to set the logger type and other settings.

<elmah> <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="ELMAHConnectionString" /> </elmah>

Presenter: Harsh Wardhan, Mindfire Solutions

Logging handled exceptions

Raise an exception using ErrorSignal class of elmah.

ErrorSignal.FromCurrentContext().Raise(new Exception("I did it..."));

Presenter: Harsh Wardhan, Mindfire Solutions

Best Practices

Secure your logs by restricting remote access.

<elmah> <security allowRemoteAccess="False" /></elmah>

Set roles to access the log.

Presenter: Harsh Wardhan, Mindfire Solutions

Question and Answer

Presenter: Harsh Wardhan, Mindfire Solutions

Thank you