我是学生。这是我们使用两个不同类文件的第一个项目，它也是使用Forms的第二个项目。所以，我对这两者都没有多少经验。
声明并实例化对象，但在任何后续方法中都无法识别该对象。我正在按照书上的代码。书上的代码声明/实例化如下：
In [60]: %timeit orig(Kx, Ky, u, v, pk)
10 loops, best of 3: 33.6 ms per loop
In [61]: %timeit alt(Kx, Ky, u, v, pk)
1000 loops, best of 3: 349 µs per loop
我认为它需要像这样，但这对后续的参考文献仍然没有帮助：
new Order = new Order( );
这是驱动程序和两个类文件的完整列表：
驱动：
Order newOrder = new Order( );
OrderGUI.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Diner
{
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new OrderGUI());
}
}
}
Order.cs： 使用系统; 使用System.Windows.Forms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Diner
{
public partial class OrderGUI : Form
{
public OrderGUI()
{
InitializeComponent();
}
//For Load - create object
private void OrderGUI_Load(object sender, System.EventArgs e)
{
newOrder = new Order();
for (int i = 0; i < newOrder.menuEntree.Length; i++)
{
this.lstBxEntree.Items.Add(newOrder.menuEntree[i]);
}
}
// Event handler that gets the entree from the
// Listbox and sets the entree price of the Order object.
private void lstBxEntree_SelectedIndexChanged
(object sender, System.EventArgs e)
{
newOrder.Entree = this.lstBxEntree.Text;
}
// Event handler that gets the special request -
// if one is selected from the predefined list.
private void cmboSpecial_SelectedIndexChanged
(object sender, System.EventArgs e)
{
newOrder.SpecialRequest = this.cmboSpecial.Text;
}
// Menu item that displays the order.
private void menuDisplayOrder_Click(object sender,
System.EventArgs e)
{
}
// Event handler that gets the radio button selected and
// sets the drink selection for the Order object
private void Drink_CheckedChanged(object sender,
System.EventArgs e)
{
if (this.radTea.Checked)
newOrder.DrinkSelection = radTea.Text;
else
if (this.radCoffee.Checked)
newOrder.DrinkSelection = radCoffee.Text;
else
if (this.radSoda.Checked)
newOrder.DrinkSelection = radSoda.Text;
else
if (this.radLemon.Checked)
newOrder.DrinkSelection = radLemon.Text;
else
if (this.radJuice.Checked)
newOrder.DrinkSelection = radJuice.Text;
else
if (this.radMilk.Checked)
newOrder.DrinkSelection = radMilk.Text;
}
// Event handler that gets raised when the check box
// for the Water gets clicked.
private void ckBxWater_CheckedChanged
(object sender, System.EventArgs e)
{
if (this.ckBxWater.Checked)
newOrder.WaterSelection = true;
else
newOrder.WaterSelection = false;
}
// Event handler that gets raised when the user types
// values into the text area of the combo box.
private void cmboSpecial_KeyPress
(object sender,
System.Windows.Forms.KeyPressEventArgs e)
{
newOrder.SpecialRequest = this.cmboSpecial.Text;
}
// Event handler that gets raised when the Edit menu
// is clicked to change the entree.
private void menuEditEntree_Click
(object sender, System.EventArgs e)
{
}
// Event handler that gets raised when the Edit menu
// is clicked to change the drink.
private void menuEditDrink_Click
(object sender, System.EventArgs e)
{
}
// Clears selections for all drink radio buttons.
public void ClearDrinks()
{
this.radMilk.Checked = false;
this.radJuice.Checked = false;
this.radSoda.Checked = false;
this.radLemon.Checked = false;
this.radTea.Checked = false;
this.radCoffee.Checked = false;
}
// Clears all selections so that a new order
// can be placed. Resets the Order object back
// to its default values.
private void menuClearOrder_Click
(object sender, System.EventArgs e)
{
}
// Displays the values for the current instance of
// Order object members
private void menuPlaceOrder_Click(object sender,
System.EventArgs e)
{
}
// Event handler that gets raised when the Edit menu
// is clicked to change the special requests.
private void menuEditSpecial_Click(object sender,
System.EventArgs e)
{
}
// Event handler that gets raised when the Help
// menu is clicked to show the About message.
private void menuAbout_Click(object sender,
System.EventArgs e)
{
MessageBox.Show("Student Union -" +
" Diner by the Valley" +
"\n\n\nVersion 1.0");
}
// Event handler that gets raised when the
// Exit is clicked
private void menuExit_Click(object sender,
System.EventArgs e)
{
Application.Exit();
}
}
}