Adding and Removing items from a ListBox

This is a small piece of code which can help startup programmers in ASP.Net

Paste this code in the code section.

void cmdAdd_Click(object sender, EventArgs e)
{
     ListItem LI = ListBox1.SelectedItem;
       
     if (LI != null)
     {
          ListBox2.Items.Add(LI);
          ListBox2.SelectedIndex = -1;
          ListBox1.Items.Remove(LI);
          ListBox1.SelectedIndex = -1;
     }
}
               
void cmdRemove_Click(object sender, EventArgs e)
{
     ListItem LI = ListBox2.SelectedItem;
               
     if (LI != null)
     {
          ListBox1.Items.Add(LI);
          ListBox1.SelectedIndex = -1;
          ListBox2.Items.Remove(LI);
          ListBox2.SelectedIndex = -1;
     }
}

This example requires two listboxes named ListBox1 and ListBox2. At least one of them having some items.