please help me I tried to print all of the data value in grid view until null value and max value per-page is 20 but my code loops many page there is no end please help me?

private void SetInvoiceData(Graphics g, System.Drawing.Printing.PrintPageEventArgs e)
{
    // Set Invoice Table:
    string FieldValue = "";
    int CurrentRecord = 0;
    int RecordsPerPage = 20; // twenty items in a page
    decimal Amount = 0;
    bool StopReading = false;

    // Set Table Head:
    int xItems = leftMargin;
    CurrentY = CurrentY + InvoiceFontHeight;

    g.DrawString("Items", InvoiceFont, BlueBrush, xItems, CurrentY);
    int xQty = xItems + (int)g.MeasureString("Items", InvoiceFont).Width + 4;

    g.DrawString("Qty", InvoiceFont, BlueBrush, xQty, CurrentY);
    int xPrice = xQty + (int)g.MeasureString("Qty", InvoiceFont).Width + 72;

    g.DrawString("Price", InvoiceFont, BlueBrush, xPrice, CurrentY);
    int xSubTotal = xPrice + (int)g.MeasureString("Price", InvoiceFont).Width + 4;

    g.DrawString("SubTotal", InvoiceFont, BlueBrush, xSubTotal, CurrentY);
    //int xSpecialization = xAddress + (int)g.MeasureString("Specialization", InvoiceFont).Width + 4;

    // g.DrawString("Discount", InvoiceFont, BlueBrush, xSpecialization, CurrentY);

    AmountPosition = xSubTotal + (int)g.MeasureString("SubTotal", InvoiceFont).Width + 4;
    //g.DrawString("Extended Price", InvoiceFont, BlueBrush, AmountPosition, CurrentY);

    // Set Invoice Table:
    CurrentY = CurrentY + InvoiceFontHeight + 8;



    while (CurrentRecord < RecordsPerPage)
    {
        foreach (DataGridViewRow row in itemgridview.Rows)
        {
            FieldValue = row.Cells[0].Value.ToString();
            // FieldValue = itemgridview.Rows["items"].ToString();
            g.DrawString(FieldValue, InvoiceFont, BlackBrush, xItems, CurrentY);


            //FieldValue = dr["itmqty"].ToString();
            FieldValue = row.Cells[1].Value.ToString();

            // if Length of (Product Name) > 20, Draw 20 character only
            if (FieldValue.Length > 20)

                FieldValue = FieldValue.Remove(20, FieldValue.Length - 20);
            g.DrawString(FieldValue, InvoiceFont, BlackBrush, xQty, CurrentY);

            //FieldValue = String.Format(dr["itemprice"].ToString());
            FieldValue = row.Cells[2].Value.ToString();
            g.DrawString(FieldValue, InvoiceFont, BlackBrush, xPrice, CurrentY);

            //FieldValue = dr["subtotal"].ToString();
            FieldValue = row.Cells[3].Value.ToString();
            g.DrawString(FieldValue, InvoiceFont, BlackBrush, xSubTotal, CurrentY);


            CurrentY = CurrentY + InvoiceFontHeight;


            if (itemgridview.Rows.Count.ToString() == null)
            {
                StopReading = true;
                break;
            }
            else
            {
                CurrentRecord++;
            }
        }
    }