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1 创建窗体项目，添加一个pictureBox1控件和一个openFileDialog1控件

//添加引用using System.IO;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 View{
       public partial class OtherForm : Form    {
           public OtherForm()        {
               InitializeComponent();        }                //定义一组图片变量        byte[] picturebytes;        private void upfile_Click(object sender, EventArgs e)        {
               //定义打开文件的类型，图片格式            openFileDialog1.Filter = "**jpg|*.JPG|*.GIF|*.GIF|*.BMP|*.BMP";            //获取打开图片返回值            if (openFileDialog1.ShowDialog() == DialogResult.OK)            {
                   string fullpath = openFileDialog1.FileName;//文件路径                FileStream fs = new FileStream(fullpath, FileMode.Open);                                picturebytes = new byte[fs.Length];                BinaryReader br = new BinaryReader(fs);                picturebytes = br.ReadBytes(Convert.ToInt32(fs.Length));                MemoryStream ms = new MemoryStream(picturebytes);                Bitmap img = new Bitmap(ms);                pictureBox1.Image = img;            }            else            {
                   MessageBox.Show("图片打开失败");            }        }                     }}

2 测试

转载地址：http://vnabi.baihongyu.com/