Storing And Restoring Graphics

hi,

i want to draw a bitmap programaticaly and store it to a db.when i try to display it from the db the drawings appear in a black back ground . how can i solve this problem.

i restore the bitmap by using a dataset and data bind contrls from

visual studio designer and codes to draw and store the bitmap is here :



private void button1_Click(object sender, EventArgs e)

{

pictureBox1.Paint+=new PaintEventHandler(pictureBox1_Paint);

pictureBox1.Refresh();

}

private void pictureBox1_Paint(object sender, PaintEventArgs e)

{

PaintImage(e.Graphics);

}

private void PaintImage(Graphics gr)

{

int p1 = Convert.ToInt32(textBox1.Text);

int p2 = Convert.ToInt32(textBox2.Text);

int p3 = Convert.ToInt32(textBox3.Text);



Pen myPen = new Pen(Color.Blue);

gr.DrawCurve(myPen, new Point[] { new Point(50, p1), new Point(100, p2), new Point(150, p3) });

}

private void button2_Click(object sender, EventArgs e)

{

Bitmap bmp = new Bitmap(pictureBox1.Width,pictureBox1.Height );

Graphics gr = Graphics.FromImage(bmp);

PaintImage(gr );



MemoryStream stream = new MemoryStream();

bmp.Save (stream, System.Drawing.Imaging.ImageFormat.Bmp );

byte[] bytes = stream.ToArray();

SqlConnection sqc = new SqlConnection("server=farhad;database=graphics_test;integrated security=sspi");

SqlCommand cmd = new SqlCommand("insert graph values(@p1,@p2,@p3,@graph)");

cmd.Connection = sqc;

cmd.Parameters.Add("@p1", SqlDbType.NVarChar);

cmd.Parameters.Add("@p2", SqlDbType.NVarChar);

cmd.Parameters.Add("@p3", SqlDbType.NVarChar);

cmd.Parameters.Add("@graph", SqlDbType.Image);

cmd.Parameters[0].Value = textBox1.Text;

cmd.Parameters[1].Value = textBox2.Text;

cmd.Parameters[2].Value = textBox3.Text;

cmd.Parameters[3].Value = bytes;

sqc.Open();

SqlDataReader reader = cmd.ExecuteReader();

reader.Read();

reader.Close();

sqc.Close();





}