Dart: Scalable Application Development

Making a system call

A fairly common use case is that you need to call another program from your Dart app, or an operating system command. For this, the abstract class Process in the dart:io package is created.

How to do it...

Use the run method to begin an external program as shown in the following code snippet, where we start Notepad on a Windows system, which shows the question to open a new file tst.txt (refer to make_system_call\bin\ make_system_call.dart):

import 'dart:io';

main() {
  // running an external program process without interaction:
  Process.run('notepad', ['tst.txt']).then((ProcessResult rs){
    print(rs.exitCode);
    print(rs.stdout);
    print(rs.stderr);
  });
}

If the process is an OS command, use the runInShell argument, as shown in the ...