c# - Execute couple command in cmd. Executed only one command -

hellp. in 'plumbing' have 3 command should performed sequentially, , each request must wait until end of previous command. have done 1st request, 2nd , 3rd skips... please suggest how change 'plumbing'?

string strcmdtext = s1; var startinfo = new processstartinfo    {    filename = "cmd.exe",    redirectstandardinput = true,    redirectstandardoutput = true,    useshellexecute = false,    createnowindow = true    };  var process = new process { startinfo = startinfo }; process.start(); process.standardinput.writeline(strcmdtext); process.waitforexit();  string strcmdtext1 = s2; process.standardinput.writeline(strcmdtext1); process.waitforexit();  string strcmdtext2 = s3; process.standardinput.writeline(strcmdtext2); process.standardinput.writeline("exit"); 

thank you.

let's go through code:

• you start instance of cmd.exe:

  var process = new process { startinfo = startinfo }; process.start(); 

• you write command standard input:

  process.standardinput.writeline(strcmdtext); 

• and wait cmd.exe exit:

  process.waitforexit(); 

• now, write command standard input:

  string strcmdtext1 = s2; process.standardinput.writeline(strcmdtext1); 

• wait, what? cmd.exe exited in previous step, there's no more process send command in first place.

• then wait process exit, it's dead long time ago:

  process.waitforexit(); 

• and repeat same non-working code:

  string strcmdtext2 = s3; process.standardinput.writeline(strcmdtext2); process.standardinput.writeline("exit"); 

you should better understand what's the problem now. looks cmd.exe quits after executing first command.

there's couple things can try:

• get rid of cmd.exe altogether. unless execute batch script can directly call intended executable (like python.exe).

• start 3 different instances of cmd.exe 3 commands.

• try pass arguments cmd.exe, /q.

try first approach first, it's cleanest one.