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Asked: 2026-05-15T10:30:47+00:00

I have an HttpHandler class (implements IHttphandler) where the path defined for the handler

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I have an HttpHandler class (implements IHttphandler) where the path defined for the handler in web.config is *.jpg. I am requesting a Jpg image in my page. Within the HTTP Handler I am writing to a file in the filesystem. By mistake I was trying to write to a non existant directory. This should have thrown an exception but the execution simply proceeds.Ofcourse no file is written. But if I give a proper directory the file is written correctly.Is there anything special about HttpHandler Exceptions.
See part of the code

 public void ProcessRequest(HttpContext context){

        File.WriteAllLines(context.Request.ApplicationPath+@"\"+"resul.log",new string[]{"Entered JPG Handler"});

If I put a breakpoint on the File.WriteAllLines statement and then step over it I can see an exception occurring.

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1 Answer

  1. Editorial Team

    Request.Application returns the application’s virtual application root path on the server. For example: “/YourApp”, as opposed to “C:\inetpub\wwwroot\YourApp.”

    What’s likely happening is File.WriteLine(…) is actually writing the file somewhere, probably in the same folder as your web server process.

    EDIT: Here’s some of the likely places to check:

    • if using built-in VS2008 web server

      C:\Program Files (x86)\Common
      Files\microsoft shared\DevServer\9.0

    • if using built-in VS2010 web server

      C:\Program Files (x86)\Common
      Files\microsoft shared\DevServer\10.0

    • if using IIS

      C:\Windows\System32\inetsrv or C:\Windows\SysWOW64\inetsrv

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