Execute long time command in SSH.NET and display the results continuously in TextBox

Question

Is there any way to execute Linux command and display the result in text box in Windows application like PuTTY.

For example I\'m trying to execute the following commands

Answer 1

First, do not use "shell" channel to automate a command execution, unless you have a good reason. Use "exec" channel (CreateCommand or RunCommand in SSH.NET).

To feed the output to a TextBox, just keep reading the stream on a background thread:

private void button1_Click(object sender, EventArgs e)
{
    new Task(() => RunCommand()).Start();
}

private void RunCommand()
{
    var host = "hostname";
    var username = "username";
    var password = "password";

    using (var client = new SshClient(host, username, password))
    {
        client.Connect();
        // If the command2 depend on an environment modified by command1,
        // execute them like this.
        // If not, use separate CreateCommand calls.
        var cmd = client.CreateCommand("command1; command2");

        var result = cmd.BeginExecute();

        using (var reader =
                   new StreamReader(cmd.OutputStream, Encoding.UTF8, true, 1024, true))
        {
            while (!result.IsCompleted || !reader.EndOfStream)
            {
                string line = reader.ReadLine();
                if (line != null)
                {
                    textBox1.Invoke(
                        (MethodInvoker)(() =>
                            textBox1.AppendText(line + Environment.NewLine)));
                }
            }
        }

        cmd.EndExecute(result);
    }
}

---

For a slightly different approach, see a similar WPF question:
SSH.NET real-time command output monitoring.

Some programs, like Python, may buffer the output, when executed this way. See:
How to continuously write output from Python Program running on a remote host (Raspberry Pi) executed with C# SSH.NET on local console?