Display progress bar while doing some work in C#?

Question

I want to display a progress bar while doing some work, but that would hang the UI and the progress bar won\'t update.

I have a WinForm ProgressForm with a Pro

Answer 1

And another example that BackgroundWorker is the right way to do it...

using System;
using System.ComponentModel;
using System.Threading;
using System.Windows.Forms;

namespace SerialSample
{
    public partial class Form1 : Form
    {
        private BackgroundWorker _BackgroundWorker;
        private Random _Random;

        public Form1()
        {
            InitializeComponent();
            _ProgressBar.Style = ProgressBarStyle.Marquee;
            _ProgressBar.Visible = false;
            _Random = new Random();

            InitializeBackgroundWorker();
        }

        private void InitializeBackgroundWorker()
        {
            _BackgroundWorker = new BackgroundWorker();
            _BackgroundWorker.WorkerReportsProgress = true;

            _BackgroundWorker.DoWork += (sender, e) => ((MethodInvoker)e.Argument).Invoke();
            _BackgroundWorker.ProgressChanged += (sender, e) =>
                {
                    _ProgressBar.Style = ProgressBarStyle.Continuous;
                    _ProgressBar.Value = e.ProgressPercentage;
                };
            _BackgroundWorker.RunWorkerCompleted += (sender, e) =>
            {
                if (_ProgressBar.Style == ProgressBarStyle.Marquee)
                {
                    _ProgressBar.Visible = false;
                }
            };
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            _BackgroundWorker.RunWorkerAsync(new MethodInvoker(() =>
                {
                    _ProgressBar.BeginInvoke(new MethodInvoker(() => _ProgressBar.Visible = true));
                    for (int i = 0; i < 1000; i++)
                    {
                        Thread.Sleep(10);
                        _BackgroundWorker.ReportProgress(i / 10);
                    }
                }));
        }
    }
}