How to display the image to picturebox from sql server2008

Question

private void button5_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=RAFIUDDEEN-PC\\SQLEXPRESS;Initial Catalog=MKH;Integrated Security=True");
try
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter();
string sql = "Select *from Detail where Roll_Number='" + textBox2.Text + "'";
SqlCommand cmd = new SqlCommand(sql, con);
if (con.State != ConnectionState.Open)
con.Open();
cmd.ExecuteNonQuery();
SqlDataReader dr = cmd.ExecuteReader();
DataSet ds = new DataSet();
DataRow rrw;

while (dr.Read())
{
if (dr.HasRows)
{
string Name = dr.GetString(1);
textBox6.Text = dr.GetDateTime(5).ToShortDateString();
string Admission_Number = dr.GetString(3);
string Class = dr.GetString(4);
string Mother_Tongue = dr.GetString(6);
string Academic_Year = dr.GetString(10);
string Father_Name = dr.GetString(11);
string Email_ID = dr.GetString(7);
string Address = dr.GetString(12);
string City = dr.GetString(13);
string State = dr.GetString(14);
textBox12.Text = dr.GetDateTime(9).ToShortDateString();
string Pin_code = dr.GetInt32(15).ToString();
string Phone = dr.GetString(16);

textBox1.Text = Name;
textBox3.Text = Admission_Number;
comboBox1.Text = Class;
comboBox2.Text = Mother_Tongue;
comboBox3.Text = Academic_Year;
textBox11.Text = Father_Name;
textBox4.Text = Email_ID;
textBox5.Text = Address;
textBox7.Text = City;
textBox8.Text = State;
textBox9.Text = Pin_code;
textBox10.Text = Phone;

byte[] Photo = (byte[])(dr[8]);
if (Photo == null)
pictureBox1.Image = null;
else
{
MemoryStream ms = new MemoryStream(Photo);
pictureBox1.Image = Image.FromStream(ms);
}
}
}
}

catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
con.Close();


}

 

 

Every one pls help me!! Photo are not showing in the Picturebox...Showing the messagebox Paramter are not valid... How will be solved..??