c# - 如何将一个类的实例传递给另一个窗体 C#

Question

因此，在主窗口类的顶部，我声明了一个员工类的实例，并将其命名为 staff1

public partial class MainWindow : Window
{

    Staff staff1 = new Staff();
    public double grossPay;
    public double taxRate;
    public MainWindow()
    {           
        InitializeComponent();
    }

    private void btnSet_Click(object sender, RoutedEventArgs e)
    {
        staff1.staffID = Convert.ToInt32(txtStaffID.Text);
        staff1.firstName = txtFirstName.Text;
        staff1.surname = txtSurname.Text;
        staff1.dob = txtDOB.Text;
        staff1.department = txtDepartment.Text;
        staff1.hourlyPayRate = Convert.ToDouble(txtPayRate.Text);
        staff1.hoursWorked = Convert.ToDouble(txtHoursWorked.Text);
   }

    private void btnClear_Click(object sender, RoutedEventArgs e)
    {
        txtStaffID.Text = "";
        txtFirstName.Text = "";
        txtSurname.Text = "";
        txtDOB.Text = "";
        txtDepartment.Text = "";
        txtPayRate.Text = "";
        txtHoursWorked.Text = "";
    }

    private void txtDOB_TextChanged(object sender, TextChangedEventArgs e) { }

    private void btnGet_Click(object sender, RoutedEventArgs e)
    {
        txtStaffID.Text = Convert.ToString(staff1.staffID);
        txtFirstName.Text = staff1.firstName;
        txtSurname.Text = staff1.surname;
        txtDOB.Text = staff1.dob;
        txtDepartment.Text = staff1.department;
        txtPayRate.Text = Convert.ToString(staff1.hourlyPayRate);
        txtHoursWorked.Text = Convert.ToString(staff1.hoursWorked);
    }

    private void btnCalcPay_Click(object sender, RoutedEventArgs e)
    {
        grossPay = staff1.calcPay();
        taxRate = staff1.calcTaxRate();
        Payslip P = new Payslip();
        P.Show();     
    }
}

然后我有另一个名为 Payslip 的表单，我想做的就是能够以新表单访问我类(class)的 staff1 实例，但我不能

public partial class Payslip : Window
{
    public Payslip()
    {
        InitializeComponent();
       // Want to be able to access staff1 here ????
    }
}

Answer 1

通过构造函数传递给它

// make a constructor in the second form that takes Staff as parameter
Staff _staff;
public Payslip(Staff s)
{
   InitializeComponent();
   _staff = s;
}

private void btnCalcPay_Click(object sender, RoutedEventArgs e)
{
    grossPay = staff1.calcPay();
    taxRate = staff1.calcTaxRate();
    // pass the staff1 instance to constructor when creating the Form 
    Payslip P = new Payslip(staff1); 
    P.Show();
}