Print Datagrid

[yueru]

I just want to print and I've got the code msdn http://msdn.microsoft.com/en-us/library/aa287528(VS.71).aspx[^]

private void button3_Click(object sender, EventArgs e)
{
printDocument1.Print();
}

    private void printDocument1\_PrintPage(System.Object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        PaintEventArgs myPaintArgs = new PaintEventArgs(e.Graphics, new Rectangle(new Point(0, 0), this.Size));
        InvokePaint(dataGridView1, myPaintArgs);
    }

When I clicked at button 3 ,I got just only page and nothing in side What's wrong with my code