c# - Why Process.Start doesn't work from asp.net web service? -

why code runs on development computer (win7 32bit) , on target server(2008r2 64bit) console app. when try run web service on target server nothing. no error, nothing.

if remove

exitmsg = proc.standardoutput.readtoend(); 

then fail error:

system.invalidoperationexception: process must exit before requested information can determined.

   [webmethod]     public string getrunningprocesses()     {         processstartinfo pinfo = new processstartinfo();         pinfo.filename = @"e:\bin\pslist.exe";                 pinfo.windowstyle = processwindowstyle.hidden;         pinfo.createnowindow = true;         pinfo.useshellexecute = false;         pinfo.redirectstandardoutput = true;          string exitmsg = "";         int exitcode = 1;          using (process proc = process.start(pinfo))         {             exitmsg = proc.standardoutput.readtoend();             proc.waitforexit(1000);             exitcode = proc.exitcode;         }          return exitmsg;     } 

i think there must user under code runs. web service code runs under asp.net user , might couses problems.

please advice me how fix this. thank much.

resolved

---

the problem eula dialog, poped invisble due processstartinfo settings. when run pslist.exe via cmd under account used application pool web service, prompted eula agreement , after everthing works fine.

the strange thing have "pinfo.arguments = "/accepteula";" in real code. should prevent probem, didn't , don't know why. if of knows why, please tell me.

thank help. trully peoples here.

i think problem with:

proc.waitforexit(1000); 

which instructs program wait second process finish. on machine, process finishes fine. on machine, though, may take longer. try changing to:

proc.waitforexit(); 

which wait indefinitely program exit.

you may want redirect output of process see if programming hanging or waiting else (or, in case, code).

in addition, process may hitting error , writing message standarderror rather standardoutput. try setting pinfo.redirectstandarderror = true; , reading see if there's you're missing.