Reading Batch shell script output into C# .Net Program

For a project I am building a new front end for an old Batch script System. I have to use Windows XP and C# with .Net. I don't want to touch this old Backend system as it's crafted over the past Decade. So my Id开发者_JS百科ea is to start the cmd.exe Program and execute the Bash script in there. For this I will use the "system" function in .Net.

But I also need to read the "Batch script commandline Output" back into my C# Program. I could redirect it into a file. But there has to be a way to get the Standard Output from CMD.exe in into my C# Program.

Thank you very much!

Given the updated question. Here's how you can launch cmd.exe to run a batch file and capture the output of the script in a C# application.

var process = new Process();
var startinfo = new ProcessStartInfo("cmd.exe", @"/C c:\tools\hello.bat");
startinfo.RedirectStandardOutput = true;
startinfo.UseShellExecute = false;
process.StartInfo = startinfo;
process.OutputDataReceived += (sender, args) => Console.WriteLine(args.Data); // do whatever processing you need to do in this handler
process.Start();
process.BeginOutputReadLine();
process.WaitForExit();

Your ways are good. But you only get the whole Output at the end. I wanted the output when the script was running. So here it is, first pretty much the same, but than I twised the output. If you have problems look at: http://msdn.microsoft.com/en-us/library/system.diagnostics.processstartinfo.aspx

public void execute(string workingDirectory, string command)
{   

    // create the ProcessStartInfo using "cmd" as the program to be run, and "/c " as the parameters.
    // Incidentally, /c tells cmd that we want it to execute the command that follows, and then exit.
    System.Diagnostics.ProcessStartInfo procStartInfo = new System.Diagnostics.ProcessStartInfo(workingDirectory + "\\" + "my.bat ", command);

    procStartInfo.WorkingDirectory = workingDirectory;

    //This means that it will be redirected to the Process.StandardOutput StreamReader.
    procStartInfo.RedirectStandardOutput = true;
    //This means that it will be redirected to the Process.StandardError StreamReader. (same as StdOutput)
    procStartInfo.RedirectStandardError = true;

    procStartInfo.UseShellExecute = false;
    // Do not create the black window.
    procStartInfo.CreateNoWindow = true;
    // Now we create a process, assign its ProcessStartInfo and start it
    System.Diagnostics.Process proc = new System.Diagnostics.Process();

    //This is importend, else some Events will not fire!
     proc.EnableRaisingEvents = true;

    // passing the Startinfo to the process
    proc.StartInfo = procStartInfo;

    // The given Funktion will be raised if the Process wants to print an output to consol                    
    proc.OutputDataReceived += DoSomething;
    // Std Error
    proc.ErrorDataReceived += DoSomethingHorrible;
    // If Batch File is finished this Event will be raised
    proc.Exited += Exited;
}

Something is off, but whatever you get the idea...

The DoSomething is this function:

void DoSomething(object sendingProcess, DataReceivedEventArgs outLine);
{
   string current = outLine.Data;
}

Hope this Helps

You can't capture the output with the system function, you have to go a bit deeper into the subprocess API.

using System;
using System.Diagnostics;
Process process = Process.Start(new ProcessStartInfo("bash", path_to_script) {
                                    UseShellExecute = false,
                                    RedirectStandardOutput = true
                                });
string output = process.StandardOutput.ReadToEnd();
process.WaitForExit();
if (process.ExitCode != 0) { … /*the process exited with an error code*/ }

You seem to be confused as to whether you're trying to run a bash script or a batch file. These are not the same thing. Bash is a unix shell, for which several Windows ports exist. “Batch file” is the name commonly given to cmd scripts. The code above assumes that you want to run a bash script. If you want to run a cmd script, change bash to cmd. If you want to run a bash script and bash.exe is not on your PATH, change bash to the full path to bash.exe.