C# 加载图片的应用

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 WindowsFormsApplication2
{
    public partial class Form1 : Form
    {
        //int ClockCount = 0;
        int ImageIndex = 1;
        public Form1()
        {
            InitializeComponent();
        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            ImageIndex++;
            if (ImageIndex > 4)
                ImageIndex = 1;
            pictureBox1.Image = Image.FromFile(ImageIndex.ToString() + ".jpg");
        }

        private void pictureBox1_Click(object sender, EventArgs e)
        {

        }








    }
}

图片效果：