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I working on maintenance of one web application, this web site having error log functionality as well.

My client occasionally face some issue on website which also logged in error log file but it shows only method calling hierarchy where exception occurred in stack trace.

When I explicitly raise exception on my Dev environment stack trace of exception shows method calling hierarchy and its line number from where actual exception has occurred.

I know in production we are deploying only DLLs that's why we are not getting error line number in log file.

Anybody has any Idea how can I get error line number as well in exception when we deployed DLL (assemblies) only?

Neeraj Kumar Gupta
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  • are you using log4net for logging? – Carbine Nov 19 '13 at 10:54
  • build your project in Release mode and then stacktrace the exception. @Neeraj Kumar Gupta – Rezoan Nov 19 '13 at 10:57
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    It seems it will work I tried it in my PC with one sample application, but my actual application deployment process all done by client it self so if they built app in debug mode and deploy pdb file as well, will it cause any performence issue ? – Neeraj Kumar Gupta Nov 19 '13 at 10:57
  • @bharath no we are having our own error logger – Neeraj Kumar Gupta Nov 19 '13 at 10:58
  • _Debug_ build really has performance impact - as stated [here](http://stackoverflow.com/a/2446062/894174). You would better enable debug symbols in _Release_ build - as Anders Abel advised in his answer. – Andrii Kalytiiuk Nov 19 '13 at 11:03

3 Answers3

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In the build settings, set your project to generate debug symbols (pdb:s) in release mode too. If they are generated they will be automatically included on deploy. There is no need to run the entire site in debug mode, you just need the debug symbols available.

The setting is in the properties of the project. Select the build configuration you are using when publishing. Then on the Build tab, push the Advanced... button and set debug info to "Full".

Anders Abel
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  • How I can set it, can you please elaborate steps? – Neeraj Kumar Gupta Nov 19 '13 at 11:24
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    Got it (in publish web site window select "Emit debug information") is it correcot ? – Neeraj Kumar Gupta Nov 19 '13 at 11:49
  • Might be able to do it that way, I usually do it in the build settings. See my edit. – Anders Abel Nov 19 '13 at 19:53
  • Also when changing it to Full, should not forget that project should also be in Release mode in Visual Studio, while doing that. – Jaanus Jan 12 '15 at 07:14
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    I set "Debug Info" to full on my Release configuration, and publish it. But my stack still without the line numbers. Locally it show things like the System.Data.Entity stack until the final exception, in production the stack stop on my calling method. Can you helpme? – Tiago Gouvêa May 17 '16 at 10:53
5

The previous answer from Anders Abel perfectly suits your needs. Nevertheless i'd like to add a more architecture-driven approach which is to refactor your log engine to use the new Caller Information attributes from C#5.0

For example you can log exceptions using this method

public static void NDLogException(Exception ex,
               [System.Runtime.CompilerServices.CallerFilePath] string sourceFilePath = "",
               [System.Runtime.CompilerServices.CallerMemberName] string memberName = "",
               [System.Runtime.CompilerServices.CallerLineNumber] int sourceLineNumber = 0)

The compiler will infer and fill in the default arguments with the corresponding values. The attribute CallerLineNumber is the one you're specifically looking for.

Of course this requires you to change your code (assuming it is available to you)

For more information about caller information attributes read here

Luis Filipe
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0

That's new feature in c#5, you can do this for example :

public class LogManager
{
    public void LogException(Exception exc,
                            [CallerMemberName] string memberName = "",
                            [CallerFilePath] string sourceFilePath = "",
                            [CallerLineNumber] int sourceLineNumber = 0)
    {
        Trace.WriteLine(string.Format("Date: {0}", DateTime.Now));
        Trace.WriteLine(string.Format("Exception: {0}", exc.Message));
        Trace.WriteLine(string.Format("Occured in: {0}", memberName));
        Trace.WriteLine(string.Format("source file path: {0}", sourceFilePath));
        Trace.WriteLine(string.Format("source line number: {0}", sourceLineNumber));
    }
}
Ema.H
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