โปรแกรมที่ 12.4
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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void list1_SelectedIndexChanged(object sender, EventArgs e)
{
int index = list1.SelectedIndex;
display.Text=list1.Items[index].ToString();
}
private void list2_SelectedIndexChanged(object sender, EventArgs e)
{
int index = list2.SelectedIndex;
display.Text=list2.Items[index].ToString();
}
}
}
โปรแกรมที่ 12.5
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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void list1_SelectedIndexChanged(object sender, EventArgs e)
{
int index = list1.SelectedIndex;
display.Text=list1.Items[index].ToString();
}
private void list2_SelectedIndexChanged(object sender, EventArgs e)
{
int index = list2.SelectedIndex;
display.Text=list2.Items[index].ToString();
}
}
}
โปรแกรมที่ 12.5
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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void add_Click(object sender, EventArgs e)
{
string str = text.Text;
listBox.Items.Add(str);
}
}
}
ใส่ข้อมูล
ลบข้อมูล
ลบทั้งหมด
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 WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void add_Click(object sender, EventArgs e)
{
string str = text.Text;
listBox.Items.Add(str);
}
private void delete_Click(object sender, EventArgs e)
{
int index = listBox.SelectedIndex;
listBox.Items.RemoveAt(index);
}
private void clear_Click(object sender, EventArgs e)
{
listBox.Items.Clear();
}
}
}