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;using System.Data.SqlClient;namespace main{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void btnUpload_Click(object sender, EventArgs e)        {            OpenFileDialog ofd = new OpenFileDialog();            ofd.Filter = "*.jpg|*.jpg|*.png|*.png|*.bmp|*.bmp";            if (ofd.ShowDialog() == DialogResult.OK)            {                string fileName = ofd.FileName;                FileStream fs = new FileStream(fileName, FileMode.Open);                byte[] imageBytes = new byte[fs.Length];                BinaryReader br = new BinaryReader(fs);                imageBytes = br.ReadBytes(Convert.ToInt32(fs.Length));                string s = "server=PC-20171113RBMO;database=StudentDB;Trusted_Connection=true";                SqlConnection con = new SqlConnection(s);                string c = "insert into Pic(image) values(@pic)";                SqlCommand cmd = new SqlCommand(c, con);                SqlParameter para = new SqlParameter("@pic", SqlDbType.Image);                para.Value = imageBytes;                cmd.Parameters.Add(para);                con.Open();                cmd.ExecuteNonQuery();                con.Close();            }        }        private void btnRead_Click(object sender, EventArgs e)        {            string s = "server=PC-20171113RBMO;database=StudentDB;Trusted_Connection=true";            SqlConnection con = new SqlConnection(s);            string c = "select image from Pic where ID = " + textBox1.Text.Trim();            SqlCommand cmd = new SqlCommand(c, con);            con.Open();            byte[] image = (byte[])cmd.ExecuteScalar();            con.Close();            MemoryStream ms = new MemoryStream(image);            Bitmap bmp = new Bitmap(ms);            pictureBox1.Image = bmp;        }    }}