Question

我正在尝试使用for-if循环来运行一些CheckBoxList控件，以查看是否选中了复选框。如果选中，它将向DB运行INSERT语句。

我的第一个CheckBoxList（stapleCheckBoxList）正常工作（例如。如果我选中了所有4个复选框，相应的项目将被插入到数据库中）。但是对于我的第二个CheckBoxList（seafoodCheckBoxList），它似乎只对所选的第一个复选框执行INSERT。任何人都可以在下面找出我的代码有什么问题吗？

protected void btnTSubmit_Click(object sender, EventArgs e)
    {
        int i;
        int intOrderNo = (int)Session["sOrderNo"];
        int Qty;
        int UnitPrice;
        string ProdId;

        if (txtPaxQty.Text != String.Empty)
        {
            UnitPrice = 12;
            Qty = int.Parse(txtPaxQty.Text);
            ProdId = "PK001";

            OleDbConnection DBconn2 = new OleDbConnection();
            DBconn2.ConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data source="
                        + Server.MapPath("~/App_Data/ParissDB.mdb");
            OleDbCommand cmd = new OleDbCommand();
            cmd.Connection = DBconn2;
            cmd.CommandType = System.Data.CommandType.Text;
            cmd.CommandText = "INSERT INTO itemsTable(iOrderNo, iProductId, iQty, iUnitPrice)"
            + "VALUES (@OrderNo, @ProductId, @Qty, @UnitPrice)";
            cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
            cmd.Parameters.AddWithValue("@ProductId", ProdId);
            cmd.Parameters.AddWithValue("@Qty", Qty);
            cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
            DBconn2.Open();
            cmd.ExecuteNonQuery();
            DBconn2.Close();
        }

        for (i = 0; i < stapleCheckBoxList.Items.Count; i++)
        {
            String str = "";

            if (stapleCheckBoxList.Items[i].Selected)
            {

                str = stapleCheckBoxList.Items[i].Text;

                OleDbConnection DBconn = new OleDbConnection();
                DBconn.ConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data source="
                            + Server.MapPath("~/App_Data/ParissDB.mdb");

                Qty = 0;
                UnitPrice = 0;

                OleDbCommand cmd = new OleDbCommand();
                cmd.Connection = DBconn;
                cmd.CommandType = System.Data.CommandType.Text;
                cmd.CommandText = "INSERT INTO itemsTable(iOrderNo, iProductId, iQty, iUnitPrice)"
                + "VALUES (@OrderNo, @ProductId, @Qty, @UnitPrice)";

                //Staple

                if (stapleCheckBoxList.Items[i].Text == "Yang Chow Fried Rice")
                {
                    str = "ST001";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (stapleCheckBoxList.Items[i].Text == "Pineapple Fried Rice")
                {
                    str = "ST002";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (stapleCheckBoxList.Items[i].Text == "Mee Goreng")
                {
                    str = "ST003";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (stapleCheckBoxList.Items[i].Text == "Fried Udon with Seafood")
                {
                    str = "ST004";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }


                //Response.Redirect("Delivery.aspx");
            }
        }

        for (i = 0; i < seafoodCheckBoxList.Items.Count; i++)
        {
            String str2 = "";

            if (seafoodCheckBoxList.Items[i].Selected)
            {

                str2 = seafoodCheckBoxList.Items[i].Text;

                OleDbConnection DBconn = new OleDbConnection();
                DBconn.ConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data source="
                            + Server.MapPath("~/App_Data/ParissDB.mdb");

                Qty = 0;
                UnitPrice = 0;

                OleDbCommand cmd = new OleDbCommand();
                cmd.Connection = DBconn;
                cmd.CommandType = System.Data.CommandType.Text;
                cmd.CommandText = "INSERT INTO itemsTable(iOrderNo, iProductId, iQty, iUnitPrice)"
                + "VALUES (@OrderNo, @ProductId, @Qty, @UnitPrice)";

                //Seafood

                if (seafoodCheckBoxList.Items[i].Text == "Butter Prawns")
                {
                    str2 = "SE002";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str2);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (seafoodCheckBoxList.Items[i].Text == "Cereal Prawns")
                {
                    str2 = "SE001";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str2);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (seafoodCheckBoxList.Items[i].Text == "Thai Style Prawns")
                {
                    str2 = "SE003";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str2);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                if (seafoodCheckBoxList.Items[i].Text == "BBQ Squid")
                {
                    str2 = "SE004";
                    cmd.Parameters.AddWithValue("@OrderNo", intOrderNo);
                    cmd.Parameters.AddWithValue("@ProductId", str2);
                    cmd.Parameters.AddWithValue("@Qty", Qty);
                    cmd.Parameters.AddWithValue("@UnitPrice", UnitPrice);
                    DBconn.Open();
                    cmd.ExecuteNonQuery();
                    DBconn.Close();
                }

                Response.Redirect("Delivery.aspx");
            }

        }

Answer 1

该行

Response.Redirect("Delivery.aspx");

位于for循环内。所以第一次进入循环时，你已经被重定向了。只需将重定向移至for循环后。

你应该严格考虑重构你的代码。除了其他方面，还有太多重复的东西可以转换为方法。

对于IF Loop无法正常工作

1 个答案: