图片在数据库中的读入与读出 (C#)

第一步：            //获取当前选择的图片      this.pictureBox1.Image = Image.FromStream(this.openFileDialog1.OpenFile());      //获取当前图片的路径          string path = openFileDialog1.FileName.ToString();      //将制定路径的图片添加到FileStream类中             FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);      //通过FileStream对象实例化BinaryReader对象          BinaryReader br = new BinaryReader(fs);      //通过BinaryReader类对象的ReadBytes()方法将FileStream类对象转化为二进制数组          byte[] imgBytesIn = br.ReadBytes(Convert.ToInt32(fs.Length));      第二步：      //将图片添加到数据库中      string sql="insert into pic values(@pic)";        SqlParameter[] param = new SqlParameter[] { new SqlParameter("@pic", imgBytesIn) };      DBHelper.GetExecuteQuery(sql, param);      第三步：      //将图片从数据库中取出      string sql="select * from pic where id=0";      SqlDataReader reader = DBHelper.GetExecuteReader(sql, null);          MemoryStream mss = null;          if (reader.Read())          {              byte[] bytes = (byte[])reader["pic"];              mss = new MemoryStream(bytes);          }             this.pictureBox2.Image = Image.FromStream(mss);