Question

I am currently working on a program, that can handle Minecraft servers. I am running my batch witch logs the server, and i now want the batch (called batch in my code) to log in my listbox called lg_log.

If it is possible, how can I do that?

I am programming in visual studio – Windows forms in c#.

Edit: This is my code:

Process batch = new Process();

string PathtoRunFile = @"\Servers\Base\start_server.bat";
string current_directory = Directory.GetCurrentDirectory();
string server_base = @"\Servers\Base";
string working_directory = current_directory + server_base;

batch.StartInfo.FileName = current_directory + PathtoRunFile;
batch.StartInfo.Arguments = "";
batch.StartInfo.WorkingDirectory = working_directory;

batch.StartInfo.UseShellExecute = true;
batch.Start();

Answer 1

The Process.StartInfo contains properties like RedirectStandardOutput. By setting this flag to true, you will be able to add an event handler to batch.StartInfo.OutputDataReceived and listen for any events. Somewhat like so:

Edit: You might also want to enable redirecting the ErrorOutput in order to receive error messages.

Edit: As requested, here is a fully working example. Make sure that test.bat exists.

using System.Diagnostics;
using System.Drawing;
using System.Windows.Forms;

public class Program {
    public static void Main() {
        var form = new Form {ClientSize = new Size(400, 300)};
        var button = new Button {Location = new Point(0, 0), Text = "Start", Size = new Size(400, 22)};
        var listBox = new ListBox {Location = new Point(0, 22), Size = new Size(400, 278)};
        form.Controls.AddRange(new Control[] {button, listBox});

        button.Click += (sender, eventArgs) => {
            var info = new ProcessStartInfo("test.bat") {UseShellExecute = false, RedirectStandardOutput = true};
            var proc = new Process {StartInfo = info, EnableRaisingEvents = true};
            proc.OutputDataReceived += (obj, args) => {
                if (args.Data != null) {
                    listBox.Items.Add(args.Data);
                }
            };
            proc.Start();
            proc.BeginOutputReadLine();
        };

        form.ShowDialog();
    }
}