process.startinfo.RedirectStandardOutput gives exception and process.waitforexit() hangs C# application

Question

using process i am getting an exception while using process.StartInfo.RedirectStandardOutput = true; the exception is below "StandardOut has not been redirected or the process hasn't started yet."

i am using process.WaitForExit which hangs my application gui so i used process.StandardOutput.ReadToEnd(); before WaitForExit as per MSDN but now my process run for infinite time and gives above exception in log file and GUI also hangs.

                Process process = new Process();
                process.StartInfo.WorkingDirectory = Path.GetDirectoryName(Application.ExecutablePath);


                string strArguments = ""; 

                process.StartInfo.FileName = @"appname.bat";
                process.StartInfo.Arguments = strArguments;
                process.StartInfo.CreateNoWindow = true;
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                process.StartInfo.RedirectStandardOutput = true;
                process.StartInfo.RedirectStandardError = true;

                process.Start();


                string output = process.StandardOutput.ReadToEnd();
                process.WaitForExit();
                process.Close();

I am not getting where am i lacking or where is the error in the code... Even i have tried time out in waitforexit also but didn't get success.

Duplicate http://stackoverflow.com/questions/139593/processstartinfo-hanging-on-waitforexit-why — Sergio Rykov, Feb 28 '13 at 11:13

score 2 · Answer 1 · answered Sep 14 '12 at 13:40

2

Try this

 process.StartInfo.RedirectStandardOutput = true;
    process.OutputDataReceived += (sender, args) => Console.WriteLine("received output: {0}", args.Data);
    process.Start();
    process.BeginOutputReadLine();

answered Sep 14 '12 at 13:40

ígor

1,144
7
16

user1797678 · Answer 2 · 2015-07-08T11:30:07.653

0

process.WaitForExit(); string output = process.StandardOutput.ReadToEnd();

You should try this. Change sequence of code.

edited Jul 08 '15 at 11:30

answered Jun 12 '15 at 07:13

user1797678

1
2

process.startinfo.RedirectStandardOutput gives exception and process.waitforexit() hangs C# application

2 Answers2