C#课后习题---消息对话框实验

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Xin
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button2_Click(object sender, EventArgs e)
{
MessageBox.Show("单击了我", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("单击了我", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
}

private void Form1_Load(object sender, EventArgs e)
{
this.KeyPreview = true;
button2.BackgroundImage = Image.FromFile(Application.StartupPath + @"\12.jpg");
button2.BackgroundImageLayout = System.Windows.Forms.ImageLayout.Zoom;
}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult dt = MessageBox.Show("确认要退出吗？","结束提示框", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning);
if(DialogResult.Cancel==dt)
{
e.Cancel = true;//取消，不做任何操作
}
if(DialogResult.Yes==dt)
{
Application.Exit();
}
}

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.Alt && e.KeyCode == Keys.B)
{
MessageBox.Show("单击了我", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
}
}
}
}