C# 触摸屏 浏览图片示例源码

【实例简介】

触摸屏上图片浏览,通用触摸屏查询软件
【实例截图】

【核心代码】

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;
using System.IO;

/*
 *功能：通用触摸屏图片浏览控件
 *编写：JiangBo
 *时间：2017-4-5
 *公司：ZhongLi Group 
 */
namespace 触摸屏
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public int iMouseX; //存储鼠标按钮按下时的X坐标
        public int iSelectImg = 0; //鼠标点击时图片编号
        public string sSelectImg;//鼠标点击时图片路径
        List<pic> piclist = new List<pic>();
        int i = 0;
 
        class pic
        {
            public int id;
            public string fname;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            pictureBox2.Visible = false;
            pictureBox3.Visible = false;
            string spath = Application.StartupPath   @"\background.jpg";
            //动态设置背景图片
            if (File.Exists(spath))
            {
                //存在文件
                this.BackgroundImage = Image.FromFile(Application.StartupPath   @"\background.jpg");
            }


            // C#遍历指定文件夹中的所有文件 
            DirectoryInfo TheFolder1 = new DirectoryInfo(Application.StartupPath   @"\img\");
            //遍历文件
                foreach (FileInfo NextFile1 in TheFolder1.GetFiles())
                {
                    string sFiletype;
                    sFiletype = NextFile1.Name.Substring(NextFile1.Name.LastIndexOf(".")   1, NextFile1.Name.Length - NextFile1.Name.LastIndexOf(".") - 1);
                    if (sFiletype == "JPG" || sFiletype == "jpg" || sFiletype == "JEPG" || sFiletype == "jpeg" || sFiletype == "BMP" || sFiletype == "bmp" || sFiletype == "PNG" || sFiletype == "png" || sFiletype == "GIF" || sFiletype == "gif")
                    {
                        i  ;
                        piclist.Add(new pic()
                        {
                            id = i,
                            fname = Application.StartupPath   @"\img\"   NextFile1.Name 
                        });
                    }
                }
            if(i==1)
            {
                pictureBox1.Load(piclist[0].fname);
            }
            if (i > 1)
            {
                pictureBox1.Load(piclist[0].fname);
                pictureBox3.Load(piclist[1].fname);
            }
            iSelectImg = 0;
        }

        private void pictureBox6_Click(object sender, EventArgs e)
        {
            System.Environment.Exit(0); 
        }
        
        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            iMouseX = e.X;
        }

        private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            if (iMouseX > e.X)
            {
                //鼠标按钮按下时的X坐标大于鼠标当前位置的X坐标，表示鼠标向左滑动
                //切换下一张图片
                if (iSelectImg >= i - 1)
                {
                    pictureBox3.Visible = false;
                    return;
                }
                if (iSelectImg >= 0)
                {
                    pictureBox2.Visible = true;
                    pictureBox2.Load(piclist[iSelectImg].fname);
                }
                pictureBox1.Load(piclist[iSelectImg   1].fname);
                if (iSelectImg < i - 2)
                {
                    pictureBox3.Visible = true;
                    pictureBox3.Load(piclist[iSelectImg   2].fname);
                }

                iSelectImg  ;
            }
            else
            {
                //切换上一张图片
                if (iSelectImg == 0)
                {
                    pictureBox2.Visible = false;
                    return;
                }
                if (iSelectImg > 1)
                {
                    pictureBox2.Visible = true;
                    pictureBox2.Load(piclist[iSelectImg - 2].fname);
                }
                pictureBox1.Load(piclist[iSelectImg - 1].fname);
                if (iSelectImg <= i - 1)
                {
                    pictureBox3.Visible = true;
                    pictureBox3.Load(piclist[iSelectImg].fname);  
                }
                iSelectImg--;
            }
        }


        
    }
}