listBox和pictureBox的使用

重要属性：
pictureBox中SizeMode可以更改图像显示的尺寸大小。

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;

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

        //为了在两个方法中都能访问到
        String[] path = Directory.GetFiles("E:\00","*.jpg");
        private void Form1_Load(object sender, EventArgs e)
        {
             for ( int i = 0; i < path.Length; i++)
            {
                 //根据路径名获取文件名称
                 string fileName = Path.GetFileName(path[i]);
                 listBox1.Items.Add(fileName);
            }
        }

        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            //添加图片文件，需要添加全路径
            pictureBox1.Image = Image.FromFile(path[listBox1.SelectedIndex]);
        }
    }
}

使用List

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;

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

        //为了在两个方法中都能访问到
        List<string> list = new List<string>();

        private void Form1_Load(object sender, EventArgs e)
        {
            String[] path = Directory.GetFiles("E:\00", "*.jpg");
             for ( int i = 0; i < path.Length; i++)
            {
                 //根据路径名获取文件名称
                 string fileName = Path.GetFileName(path[i]);
                 listBox1.Items.Add(fileName);

                 //将图片全路径添加到List泛型中；
                 list.Add(path[i]);
            }
        }

        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            //添加图片文件，需要添加全路径
            pictureBox1.Image = Image.FromFile(list[listBox1.SelectedIndex]);
        }

        private void listBox1_Click(object sender, EventArgs e)
        {
            
            pictureBox1.Image = Image.FromFile(list[listBox1.SelectedIndex]);
        }
    }
}