我正在制作一个简单的预订系统，该系统使用GUI进行输入和显示，其中包含所有逻辑和存储可用/可用座位的类。我的问题我不知道如何在整个GUI使用表单加载时如何在类的实例上创建。但是我按下了按钮，但是每次单击按钮时，类中存储的数据都会重置。当表单加载时，如何在单击按钮时不重置数据，如何创建类的实例。下面是我的GUI代码，可以解决我的数据重置问题。感谢您的帮助，如果我在发布前搜索时错过了相关主题，请告诉我。
namespace AirLine
{
public partial class ReservationSystem : Form
{
public ReservationSystem()
{
InitializeComponent();
radioFirst.Checked = true; // start program with button checked
}
private void buttonBook_Click(object sender, EventArgs e)
{
Label[] labelFirst = new Label[] { labelFirst1, labelFirst2, labelFirst3, labelFirst4, labelFirst5 };
Label[] labelEcon = new Label[] { labelEcon1, labelEcon2, labelEcon3, labelEcon4, labelEcon5 };
CheckBox[] checkFirst = new CheckBox[] { checkFirst1, checkFirst2, checkFirst3, checkFirst4, checkFirst5 };
CheckBox[] checkEcon = new CheckBox[] { checkEcon1, checkEcon2, checkEcon3, checkEcon4, checkEcon5 };
Reservation res = new Reservation();
int x;
int i = 0; // counter for bool update
int k = 0; // counter for manual seat slecetion FirstClass
int c = 0; // counter for manual seat selection Econ
int j = 0; // counter to reset unchecked boxes
while (i < checkFirst.Length) //update fseats bool
{
if (checkFirst[i].Checked == true) //if box chceked correspsonding bool change to true
{
res.reserveFirstClassSeat(i);
}
if (checkEcon[i].Checked == true) //if box chceked correspsonding bool change to true
{
res.reserveEconomyClassSeat(i);
}
++i; // tick i
}
//booking of first avialible seat
try
{
string firstname = textFirst.Text;
string lastname = textLast.Text;
int age = Convert.ToInt32(textAge.Text);
string name = firstname + lastname + age;
if (textFirst.Text != "" && textLast.Text != "" && Enumerable.Range(1, 150).Contains(age)) //validate user input
{
if (radioFirst.Checked == true) //User selected first class
{
if (res.isFirstClassAvailable() == false && res.isEconomyClassAvailable() == true)
{
System.Windows.Forms.MessageBox.Show("First Class is full, Only Economy left"); // if first class is full inform user
}
if (res.isFirstClassAvailable() == true ) // verify a seat is open in first class
{
x = res.nextAvailableFirstClassSeat(); // store next availible seat number
res.reserveFirstClassSeat(x); // resevere next availible seat
checkFirst[x].Checked = true; // check checkbox of seat
labelFirst[x].Text = name; //Change label to reflect name and age of passenger
}
}
if (radioEcon.Checked == true) //User selected Econ class
{
if (res.isFirstClassAvailable() == true && res.isEconomyClassAvailable() == false)
{
System.Windows.Forms.MessageBox.Show("Economy is full, Only First Class left"); // if econ is full inform user
}
if (res.isEconomyClassAvailable() == true) // verify a seat is open in first class
{
x = res.nextAvailableEconomyClassSeat(); // store next availible seat number
res.reserveEconomyClassSeat(x); // resevere next availible seat
checkEcon[x].Checked = true; // check checkbox of seat
labelEcon[x].Text = name; //Change label to reflect name and age of passenger
}
}
}
else // if input is not valid
{
System.Windows.Forms.MessageBox.Show("Please Check Name, Age, and Seat #");
}
}
catch (FormatException)
{
System.Windows.Forms.MessageBox.Show("Please Check Name, Age, and Seat #");
}
// manual check of seat
try
{
string firstname = textFirst.Text;
string lastname = textLast.Text;
int age = Convert.ToInt32(textAge.Text);
string name = firstname + lastname + age;
if (textFirst.Text != "" && textLast.Text != "" && Enumerable.Range(1, 150).Contains(age)) //validate user input
{
if (radioManual.Checked == true)
{
while (k < checkFirst.Length)
{
if (checkFirst[k].Checked == true && labelFirst[k].Text == "Open") // see if box was checked and label is still "Open"
{
res.reserveFirstClassSeat(k);
labelFirst[k].Text = name;
}
++k;
}
while (c < checkEcon.Length)
{
if (checkEcon[c].Checked == true && labelEcon[c].Text == "Open")
{
res.reserveEconomyClassSeat(c);
labelEcon[c].Text = name;
}
++c;
}
}
}
else // if input is not valid
{
System.Windows.Forms.MessageBox.Show("Please Check Name, Age, and Seat #");
}
}
catch (FormatException)
{
System.Windows.Forms.MessageBox.Show("Please Check Name, Age, and Seat #");
}
if (res.isFirstClassAvailable() == false && res.isEconomyClassAvailable() == false) // if flight is full inform user
System.Windows.Forms.MessageBox.Show("Flight is Full");
{ // clear text boxes
textFirst.Text = "";
textLast.Text = "";
textAge.Text = "";
}
}
private void buttonUpdate_Click(object sender, EventArgs e)
{
Label[] labelFirst = new Label[] { labelFirst1, labelFirst2, labelFirst3, labelFirst4, labelFirst5 };
Label[] labelEcon = new Label[] { labelEcon1, labelEcon2, labelEcon3, labelEcon4, labelEcon5 };
CheckBox[] checkFirst = new CheckBox[] { checkFirst1, checkFirst2, checkFirst3, checkFirst4, checkFirst5 };
CheckBox[] checkEcon = new CheckBox[] { checkEcon1, checkEcon2, checkEcon3, checkEcon4, checkEcon5 };
int j = 0;
while (j < checkFirst.Length)
{
if (checkFirst[j].Checked == false)
{
labelFirst[j].Text = "Open";
}
if (checkEcon[j].Checked == false)
{
labelEcon[j].Text = "Open";
}
++j;
}
}
}
}
答案 0 :(得分：0)
要在整个GUI中使用myClass的实例，请执行以下操作。
public partial class MainWindow : Window
{
MyClass myClass;
public MainWindow()
{
myClass = new MyClass();
InitializeComponent();
}
}