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 Test
{
public partial class ListBox01 : Form
{
public ListBox01()
{
InitializeComponent();
}
private void button1_Click(object
sender, EventArgs e)
{
//listBox1.SelectedIndex
: 항목의 위치(int)
//listBox1.SelectedItem
: 항목 자체(String)
//선택된 항목이 반드시 존재할때만...
if
(listBox1.SelectedIndex > -1)
{
}
MessageBox.Show(listBox1.SelectedIndex.ToString());
MessageBox.Show(listBox1.SelectedItem.ToString());
}
private void button2_Click(object
sender, EventArgs e)
{
//동적으로 항목추가
listBox1.Items.Add("추가항목");
}
private void button3_Click(object
sender, EventArgs e)
{
//항목 수정하기 -> 누구?
listBox1.Items[2] = "three";
}
private void button4_Click(object
sender, EventArgs e)
{
//1. 선택된 항목이 존재하는지?
//2. 선택된 항목 얻어오기
//2. 그 항목의 값을 수정하기
if
(listBox1.SelectedIndex > -1)
{
listBox1.Items[listBox1.SelectedIndex] = "수정";
}
else
{
MessageBox.Show("항목을 선택하세요");
}
}
private void button5_Click(object
sender, EventArgs e)
{
if
(listBox1.SelectedIndex > -1)
{
//항목 삭제
listBox1.Items.RemoveAt(listBox1.SelectedIndex);
}
else
{
MessageBox.Show("항목을 선택하세요");
}
}
private void button6_Click(object
sender, EventArgs e)
{
//특정 항목을 선택하기(클릭처럼)
this.listBox1.SelectedIndex
= 3;
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs
e)
{
label1.Text = listBox1.SelectedIndex.ToString();
}
private void listBox2_SelectedIndexChanged(object sender, EventArgs
e)
{
}
private void ListBox01_Load(object
sender, EventArgs e)
{
for (int i = 0; i < 9; i++)
{
listBox2.Items.Add((i * 100).ToString());
}
}
private void button7_Click(object
sender, EventArgs e)
{
//선택된 항목들
//listBox2.SelectedIndices
//listBox2.SelectedItems
for (int i = 0; i < listBox2.SelectedIndices.Count;
i++)
{
label2.Text += "\r\n"
+ listBox2.SelectedIndices[i].ToString();
}
for (int i = 0; i < listBox2.SelectedItems.Count; i++)
{
label2.Text += "\r\n"
+ listBox2.SelectedItems[i].ToString();
}
}
}
}
