// Fig. 15.20: CheckedListBoxTestForm.cs
// Using a CheckedListBox to add items to a display ListBox
using System;
using System.Windows.Forms;

namespace CheckedListBoxTest
{
   // Form uses a checked ListBox to add items to a display ListBox
   public partial class CheckedListBoxTestForm : Form
   {
      // constructor
      public CheckedListBoxTestForm()
      {
         InitializeComponent();
      } // end constructor

      // item about to change
      // add or remove from display ListBox
      private void itemCheckedListBox_ItemCheck(
         object sender, ItemCheckEventArgs e )
      {
         // obtain reference of selected item
         string item = itemCheckedListBox.SelectedItem.ToString();

         // if item checked add to ListBox
         // otherwise remove from ListBox
         if ( e.NewValue == CheckState.Checked )
            displayListBox.Items.Add( item );
         else
            displayListBox.Items.Remove( item );
      } // end method itemCheckedListBox_ItemCheck
   } // end class CheckedListBoxTestForm
} // end namespace CheckedListBox

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