private void txtQty_KeyDown(object sender, KeyEventArgs e)
        {
            /* if (raOR.Checked == true)
             * {
             *   if (e.KeyCode == Keys.Enter && txtQty.Text != string.Empty)
             *   {
             *       txtDescount.Focus();
             *   }
             * }
             */


            if (e.KeyCode == Keys.Enter)
            {
                if (raOR.Checked == true)
                {
                    if (order.VarifyQty(txtIDproduct.Text, Convert.ToInt32(txtQty.Text)).Rows.Count < 1)
                    {
                        MessageBox.Show("cadadkaan kuma jiro baqaarka", "baqaarka", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        return;
                    }
                }
                for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
                {
                    if (dataGridView1.Rows[i].Cells[0].Value.ToString() == txtIDproduct.Text)
                    {
                        MessageBox.Show("agabkaan waa ku jiraa liiska", "iska jir", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                        return;
                    }
                }
                if (raOR.Checked == true && state == "add")
                {
                    DataRow r = Dt.NewRow();

                    r[0] = txtIDproduct.Text;
                    r[1] = txtNameProduct.Text;
                    r[2] = txtPrice.Text;
                    r[3] = txtQty.Text;
                    r[4] = txtAmount.Text;
                    r[5] = lbcost.Text;
                    //r[6] = txtTotalAmount.Text;
                    Dt.Rows.Add(r);
                    dataGridView1.DataSource = Dt;
                }
                else if (raOR.Checked == true && state == "update")
                {
                    DataRow r1 = Dt1.NewRow();

                    r1[0] = txtIDproduct.Text;
                    r1[1] = txtNameProduct.Text;
                    r1[2] = txtPrice.Text;
                    r1[3] = txtQty.Text;
                    r1[4] = txtAmount.Text;
                    r1[5] = lbcost.Text;
                    // r1[6] = txtTotalAmount.Text;
                    Dt1.Rows.Add(r1);

                    dataGridView1.DataSource = Dt1;
                }
                else
                {
                    DataRow r2 = Dt2.NewRow();

                    r2[0] = txtIDproduct.Text;
                    r2[1] = txtNameProduct.Text;
                    r2[2] = txtPrice.Text;
                    r2[3] = txtQty.Text;
                    r2[4] = txtAmount.Text;
                    // r1[5] = lbcost.Text;
                    // r1[6] = txtTotalAmount.Text;
                    Dt2.Rows.Add(r2);

                    dataGridView1.DataSource = Dt2;
                }

                ClearBoxes();
                txtSumTotals.Text = (from DataGridViewRow row in dataGridView1.Rows
                                     where row.Cells[4].FormattedValue.ToString() != string.Empty
                                     select Convert.ToDouble(row.Cells[4].FormattedValue)).Sum().ToString();
            }
        }