image viewing in data grid view in dbms

SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from student_info where student_name like('%"+ textBox1.Text +"%') ";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
dataGridView1.DataSource = dt;

Bitmap img;
DataGridViewImageColumn imageCol = new DataGridViewImageColumn();
imageCol.HeaderText = "student_image";
imageCol.ImageLayout = DataGridViewImageCellLayout.Zoom;
imageCol.Width = 100;
dataGridView1.Columns.Add(imageCol);

foreach (DataRow dr in dt.Rows)
{
#### img = new Bitmap(@"..\..\" + dr["student_images"].ToString());
dataGridView1.Rows[i].Cells[8].Value = img;
dataGridView1.Rows[i].Height = 100;
i = i + 1;
}
}
}

}