using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

namespace ListBoxAddRangeTest

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void listBox1_SelectedValueChanged(object sender, EventArgs e)

        {

            if (listBox1.SelectedItems.Count > 0)

            {

                System.Windows.Forms.MessageBox.Show(listBox1.SelectedItems[0].ToString());

            }

        }

        private void button1_Click(object sender, EventArgs e)

        {

            string[] testArray = new string[] { "me", "you" };

            listBox1.Items.AddRange(testArray);

            listBox1.SelectedIndex = 0;//就是这里，人工选中

        }

    }

}