If you’re using ListViews in c# (Winforms or WPF – like a ListBox – but better), you’ve probably wanted to update the ListView data (ItemsSource – I also hope you’re using binding) without blocking the UI. Below is a simple method I’ve used that seems to work well, and allows you to pass parameters if needed. You can also download the entire project at: https://github.com/cbitting/ListViewUpdateMultiThread
using System; using System.Collections.Generic; using System.Linq; using System.Threading; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; namespace wpfMultiThreadListViewUpdate { public class Person { public string Name { get; set; } } public partial class MainWindow : Window { private Thread _thread; public MainWindow() { InitializeComponent(); } private void btnUpdate_Click(object sender, RoutedEventArgs e) { _thread = new Thread(() => showSomePeople(new Random().Next(4, 15), lstvwPeople)); _thread.Start(); } private void showSomePeople(int numberToGet, ListView listvw) { List<Person> somePeople = getSomePeople(numberToGet); Dispatcher.BeginInvoke(new Action(delegate() { listvw.ItemsSource = somePeople; })); } private List<Person> getSomePeople(int numberToGet) { List<Person> peeps = new List<Person>(); for (int i = 0; i < numberToGet; i++) { peeps.Add(new Person() { Name = randomName() }); Thread.Sleep(200); } return peeps; } private string randomName() { const string chrs = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; Random rdm = new Random(); return new string(Enumerable.Repeat(chrs, 6) .Select(s => s[rdm.Next(s.Length)]).ToArray()); } } }
Chris Bitting 