C#：将图片文件上传到数据库两种方法。

string str;
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                str = openFileDialog1.FileName;
                pictureBox1.Image = Image.FromFile(str);
            }
        }//打开文件并在PictureBox中显示图片

        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            string filename = DateTime.Now.Ticks.ToString();//时间戳，保证图片名称不重复
            string name = @"F:\数据库作业\外卖\外卖\外卖\bin\Debug\image\" + filename;
            File.Copy(str, name);//将图片复制到指定文件夹
            _users.Domain(name);//利用SQL将文件路径上传至数据库
        }
        private void toolStripButton3_Click(object sender, EventArgs e)
        {
            var info = _users.SelectDomain();//SQL查询路径
            pictureBox1.Image = Image.FromFile(info.Rows[0][0].ToString());//显示照片
            this.pictureBox1.Refresh();
        }

string str;
        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                str = openFileDialog1.FileName;
                pictureBox1.Image = Image.FromFile(str);
            }
            
        }//打开文件并在PictureBox中显示图片

        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            FileStream fs = new FileStream(str, FileMode.Open, FileAccess.Read);
            BinaryReader br = new BinaryReader(fs);
            byte[] imgBytesIn = br.ReadBytes(Convert.ToInt32(fs.Length));//转成二进制数据的操作
            _users.Domain(imgBytesIn);
        }

        private void toolStripButton3_Click(object sender, EventArgs e)
        {
            var table = _users.SelectDomain();
            byte[] imagedata = (byte[])(table.Rows[0][0]);
            MemoryStream myStream = new MemoryStream(imagedata);//转成图片
            pictureBox1.Image = Image.FromStream(myStream);//显示图片
        }

    }