我的代码没有向datagridview添加数据

Question

我的问题是我的代码无效。扫描条形码时，应将项目添加到网格中。

我所做的是当项目被扫描时，它将出现在文本框中，其名称将出现在另一个文本框中，之后如果项目有库存，项目数据将被添加到datagridview。

这是我的代码。

using (var con = new SqlConnection("Data Source=hamo25.ddns.net;Initial Catalog=POS;Persist Security Info=True;User ID=sa;Password=31045"))
        using (var cmd = new SqlCommand("SELECT * FROM Products WHERE Item_Code = @BarCode", con))
        {
            cmd.Parameters.Add(new SqlParameter("@BarCode", code.Text));
            con.Open();
            SqlDataReader reader = cmd.ExecuteReader();
            while (reader.Read())
            {

                foreach (DataGridViewRow row in receiptgrid.Rows)
                {
                    //Condition item out of stock
                    if (Convert.ToInt32(reader.GetInt32(4)) > 1)
                    {
                        repeat:

                        name.AppendText(Environment.NewLine + reader.GetString(1));
                        string pname = reader.GetString(1);
                        string price = reader.GetString(2);
                        bool Found = false;
                        if (receiptgrid.Rows.Count > 0)
                        {
                            if (Convert.ToString(row.Cells[0].Value) == reader.GetString(1) && Convert.ToString(row.Cells[1].Value) == reader.GetString(2))
                            {
                                row.Cells[2].Value = Convert.ToString(1 + Convert.ToInt32(row.Cells[2].Value));
                                Found = true;
                            }
                            if (!Found)
                            {
                                receiptgrid.Rows.Add(pname, price, 1, price, date.Text);
                            }
                            else
                            {
                                receiptgrid.Rows.Add(pname, price, 1, price);
                            }
                            //Multiplying the qty by the price ==================================================================
                            row.Cells[receiptgrid.Columns["Total"].Index].Value = Convert.ToDouble(row.Cells[receiptgrid.Columns["Price"].Index].Value) * Convert.ToDouble(row.Cells[receiptgrid.Columns["QTY"].Index].Value);
                            Thread.Sleep(500);
                            name.Text = string.Empty;
                            name.Select(0, 0);
                            name.ScrollToCaret();

                            name.Select(0, 0);
                            name.ScrollToCaret();
                            name.Text = string.Empty;
                        }
                        //contiton if item is out of stock
                        else if (Convert.ToInt32(reader.GetInt32(4)) == 1)
                        {
                            DialogResult result = MessageBox.Show("This item should be out of stock, Continue anyway?", "POS", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation);
                            if (result == DialogResult.Yes)
                            {
                                goto repeat;
                            }
                            else
                            {
                                MessageBox.Show("This Item is out of Stock", "POS", MessageBoxButtons.OK, MessageBoxIcon.Hand);
                            }
                        }
                    }
                }
            }
        }
        //Calculating the total =================================================
        double sum = 0;
        for (int i = 0; i < receiptgrid.Rows.Count; i++)
        {
            sum += Convert.ToDouble(receiptgrid.Rows[i].Cells[3].Value);
        }
        Totaltxt.Text = sum.ToString();
        //end
        int qty = 0;
        for (int i = 0; i < receiptgrid.Rows.Count; i++)
        {
            qty += Convert.ToInt32(receiptgrid.Rows[i].Cells[2].Value);
        }
        Totalqty.Text = qty.ToString();
    }

谢谢