Asp.net Error Handling Line Number
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How To Get Exception Line Number In C# In Release Mode
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a c# get line number from exception without pdb minute: Sign up How does ASP.NET get line numbers in it's generic error handler up vote 2 down vote favorite Everyone is familiar with the default error handler for ASP.NET. The yellow boxes that contain Source Error (5 lines of code
C# Exception Stack Trace Line Numbers
where the error happened) and Source File (filename and line number) like so: Source Error: Line 48: public ActionResult TriggerException() Line 49: { Line 50: throw new SystemException("This is a generated exception to test the global error handler."); Line 51: } Line 52: Source File: c:\MyApp\Controllers\TestToolsController.cs Line: 50 I am building a custom error handler and want to get these same pieces of information, but they are not contained in the exception object. Does anyone know how I may retrieve these items. how do i find the line number of exception in c# asp.net exception-handling share|improve this question asked Jan 29 '13 at 15:14 CodeGrue 2,97352557 add a comment| 1 Answer 1 active oldest votes up vote 6 down vote The line number is not available in the Exception itself, but it is available in the StackTrace, like so: try { // code that throws an Exception here } catch (Exception exc) { var frame = new StackTrace(exc, true).GetFrame(0); // where the error originated var lineNumber = frame.GetFileLineNumber(); // Handle line numbers etc. here } share|improve this answer answered Jan 29 '13 at 15:17 Roy Dictus 24.4k53556 Great start. That gives me the filename and line number. How might I get the 5 lines of code? –CodeGrue Jan 29 '13 at 15:27 You don't get the code. By having the file and line number, you or another developer can look up the problem. The original source code itself is never baked into the EXE/DLL. –Roy Dictus Jan 30 '13 at 9:11 So how does ASP.NET display the 5 lines in it's error screen on my production server when it only has my compiled application deployed? –CodeGrue Jan 30 '13 at 21:06 Are you sure that is the case? Any error message showing source code on a production system is a huge security issue. It would appear that the source code is actually on the production system, either as code files or embedded in the PDB files (symbol files, w
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C# Stacktrace Class
with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow exception line number python is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Add line numbers to stack trace of ASP.NET web site that is deployed http://stackoverflow.com/questions/14586107/how-does-asp-net-get-line-numbers-in-its-generic-error-handler in release mode up vote 6 down vote favorite 1 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 http://stackoverflow.com/questions/20069409/add-line-numbers-to-stack-trace-of-asp-net-web-site-that-is-deployed-in-release 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? c# asp.net .net exception pdb-files share|improve this question edited Nov 22 '13 at 6:28 asked Nov 19 '13 at 10:47 Neeraj Kumar Gupta 71431228 are you using log4net for logging? –CarbineCoder 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 1 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. You would better e
ASP.NET Community Standup Forums Help Home/ASP.NET Forums/General ASP.NET/Getting Started/Obtaining exception line number using http://forums.asp.net/t/1302019.aspx?Obtaining+exception+line+number+using+Server+GetLastError Server.GetLastError Obtaining exception line number using Server.GetLastError [Answered]RSS 12 replies Last post Aug 06, 2009 10:36 AM by mikeg@ar ‹ Previous Thread|Next Thread › Print http://happycodingblog.blogspot.com/2013/03/aspnet-debugfalse-and-line-numbers-in.html Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply Rouchie Member 66 Points 349 Posts Obtaining exception line number line number using Server.GetLastError Aug 07, 2008 04:40 AM|Rouchie|LINK I currently have a custom error page in my application that automatically emails me with any errors that occur. To get the error details I do something like this: Dim ex As Exception = HttpContext.Current.Server.GetLastError() If TypeOf ex get line number Is HttpUnhandledException AndAlso ex.InnerException IsNot Nothing Then ex = ex.InnerException End If If ex IsNot Nothing Then Dim s As New StringBuilder s.AppendLine("Message:" & Environment.NewLine & ex.Message & Environment.NewLine) s.AppendLine("Source:" & Environment.NewLine & ex.Source & Environment.NewLine) s.AppendLine("Stack Trace:" & Environment.NewLine & ex.StackTrace) ' ... email code here ... End If I realised today however that it would be much more useful to also have the filename of the misbehaving page, plus the line number. Currently this is not within the stack trace where I thought it would be. Can anyone advise how I can include this information? Thanks. Reply santa_1975 Contributor 5601 Points 1490 Posts Re: Obtaining exception line number using Server.GetLastError Aug 07, 2008 04:59 AM|santa_1975|LINK You can use the StackTrace and StackFrame from the System.Diagnostics as below. StackTrace st = new StackTrace(new StackFrame(true)); StackFrame sf = st.GetFrame(0); Console.WriteLine("File Name: {0}", sf.GetFileNam
ASP.NET debug="false" and line numbers in error stack trace It's a good practice to always log run-time errors to a database table or a log file or both. It is also nice to have line numbers appear in the stack trace to be able to see where in your code the error appears. For some types of errors, e.g. for exceptions of type NullReferenceException, this is especially relevant as there is no other way to determine what went wrong. In the past I had to deploy a debug build of the application and set debug="true" within the compilation section of web.config, in order to be able to see the line numbers in error logs. But this is not a good idea, as this adversely affects application performance (see this blog from Scott Guthrie for more details and this blog for even more details). So please, always set debug="false" in production environments. Or, even better, set deployment retail="true" in your production machine.config But what do we do if we really want more detailed error information in our logs? There appears to be a an easy way to do this. In the properties of your project, in the Build section, select your Release configuration, click Advanced and make sure that Debug Info is set to pdb-only. This is equivalent to setting this compiler option:/debug:pdbonlyin the compilerOptions attribute of the compiler element in web.config (for more details about this compiler option read this MSDN articleand this blog article). This will emit your optimized release assemblies together with corresponding .pdb files containing all the information needed to reference files and line numbers in exception stack traces. You can then deploy the build output into your production environment. This will allow you to log error details like line numbers without significantly affecting the performance of your compiler-optimized release assemblies. Warning: if you do this, then also please make sure that you don't set customErrors mode="off" so that you don't expose detailed exceptions to remote users (which is a wise thing to do from security standpoint!) Happy coding! Posted by Leonid Levin at 14:24 Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Labels: ASP.NET, Deployment Reactions: 1 comment: Jimmy WarrenMay 7, 2013 at 2:48 P