Load ListBox Using ThreadPool in C#
ThreadPool is a class which contains a pool of threads. By using these threads, we can send work in the form of the delegate. Here we discuss how to load data into ListBox using ThreadPool class in C#.
Open Microsoft Visual Studio 2015 => Create Windows Application and name it as ListBoxThreadPool and add below code to the Form1.
using System;
using System.Windows.Forms;
namespace ListBoxThreadPool
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private delegate void Add(int i);
private void AddItem(int I)
{
listBox1.Items.Add("ListBox-" + i);
Application.DoEvents();
}
private void LoadListBox(object state)
{
for (int i = 0; i < 100000; i++)
listBox1.Invoke(new Add(AddItem), new object[] { i });
}
private void Form1_Load(object sender, EventArgs e)
{
System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(LoadListBox));
}
}
}
As shown above w define the delegate to call LoadListBox() method. Inside LoadListBox() we are calling AddItem() method which doesn’t return any value. Run the application, and we get the output as below.
