我已经创建了菜单项的类,并且我无法弄清楚某人某人从组合框中选择比萨并选择浇头时如何获得价格。我从数据库中获得比萨价格和最佳价格。这是我的比萨类如何从数据库中检索数据
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace ItalianoLIB.BLL
{
public class Pizza
{
public string pizzaName { get; set; }
public string toppingName { get; set; }
public double toppingPrice { get; set; }
public double pizzaPrice { get; set; }
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace ItalianoWIN.PLL
{
public partial class PizzaMenu : Form
{
public string newPizzaName { get; set; }
public string newToppingName { get; set; }
public double newToppingPrice { get; set; }
public double newPizzaPrice { get; set; }
public PizzaMenu()
{
InitializeComponent();
}
private void Pizza_Load(object sender, EventArgs e)
{
//new connection from the DButils class
SqlConnection con = new SqlConnection(ItalianoLIB.DLL.DButils.CONSTR);
con.Open();
//fill Pizza type combo box
SqlDataAdapter da = new SqlDataAdapter("select * from pizza", con);
DataTable dt = new DataTable();
da.Fill(dt);
for (int i = 0; i < dt.Rows.Count; i++)
{
cboPizzaType.Items.Add(dt.Rows[i]["PizzaType"]);
}
//fill toppings listbox
SqlDataAdapter da2 = new SqlDataAdapter("select * from Topping",con);
DataTable dt2 = new DataTable();
da2.Fill(dt2);
for (int i = 0; i < dt2.Rows.Count; i++)
{
lstToppings.Items.Add(dt2.Rows[i]["ToppingName"]);
}
con.Close();
}
private void cboPizzaType_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void lstToppings_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void bnPizOrd_Click(object sender, EventArgs e)
{
newPizzaName = cboPizzaType.Text.ToString();
//Brings the user back to the main form
this.DialogResult = DialogResult.OK;
}
private void bnAddTop_Click(object sender, EventArgs e)
{
object obj = lstToppings.SelectedItem;
lstSelTop.Items.Add(obj);
lstToppings.Items.Remove(obj);
}
private void bnDelTop_Click(object sender, EventArgs e)
{
object obj = lstSelTop.SelectedItem;
lstToppings.Items.Add(obj);
lstSelTop.Items.Remove(obj);
}
}
}
建议您写一个只与数据库交互的小命令行程序检索你知道的东西已经存在,或者更新那里的东西。试图插入某些东西会变得更复杂。 – octopusgrabbus 2012-04-24 21:07:37
你究竟在问什么?你没有说明任何不起作用 – 2012-04-24 21:08:41
我有在sql服务器中的披萨表,它有一个pizzaName和披萨价格。我用sql server中的披萨表填充组合框。我试图找出某人在组合框中选择一个披萨时,我如何从所选项目的披萨价格字段中获得价格。 – 2012-04-24 21:17:27