Problem in printing the data gridview

Quote:

only solution i found to restrict the problem to occur is checking if any row exist in the grid. then print else popup message for asking to fill the grid first. is there any other solution besides this please let me know.

Bitmap bitmap;
        private void btnPrint_Click(object sender, EventArgs e)
        {
            try
            {
                int height = grdSpanSale.Height;
                grdSpanSale.Height = grdSpanSale.RowCount * grdSpanSale.RowTemplate.Height;

                //Create a Bitmap and draw the DataGridView on it.
                bitmap = new Bitmap(this.grdSpanSale.Width, this.grdSpanSale.Height);
                grdSpanSale.DrawToBitmap(bitmap, new Rectangle(0, 0, this.grdSpanSale.Width, this.grdSpanSale.Height));

                //Resize DataGridView back to original height.
                grdSpanSale.Height = height;

                //Show the Print Preview Dialog.
                printPreviewDialog1.Document = printDocument1;
                printPreviewDialog1.PrintPreviewControl.Zoom = 1;
                printPreviewDialog1.ShowDialog();
            }
            catch/*(Exception exec)*/
            {
                fromTOdate();
                //MessageBox.Show(exec.ToString());
            }
        }
        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            e.Graphics.DrawImage(bitmap, 0, 0);
        }