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
        }}