Description

This application evaluates payroll, using the total time worked in one or two weeks by an employee and his or her hourly salary. The calculation takes overtime into account.

Practical Learning: Creating the Application

1. Start Microsoft Visual Studio
2. On the Visual Studio 2022 dialog box, click Create a New Project
3. In the Create a New Project dialog box, in the Languages combo box, select C# and, in the list project templates, click Windows Forms App
4. Click Next
5. In the Configure Your New Project dialog box, set the Project Name to PayrollEvaluation1
6. Click Next
7. In the Additional Information dialog box, in the Framework combo box, select the highest version (.NET 9.0 (Standard Term Support)).
   Click Create
8. In the Solution Explorer, right-click Form1.cs and click Rename
9. Type Exercise (to get Exercise.cs) and press Enter twice
10. Design the form as follows:
     

    

    Control		Name	Text	Other Properties
    GroupBox			Employee Identification
    Label			&Employee Name:
    TextBox		txtEmployeeName		AutoCompleteCustomSource Andy Barang Thomas Stones Gertrude Monay Christophe Yuen Micheline Hammond Paul Bertrand Yamaguchi AutoCompleteSource: Suggest AutoCompleteMode: CustomSource
    Label			Hourly &Salary:
    TextBox		txtHourlySalary
    GroupBox			Time Values
    Label			Monday
    Label			Tuesday
    Label			Wednesday
    Label			Thursday
    Label			Friday
    Label			Saturday
    Label			Sunday
    Label			Work Week:
    TextBox		txtMonday	0.00	TextAlign: Right
    TextBox		txtTuesday	0.00	TextAlign: Right
    TextBox		txtWednesday	0.00	TextAlign: Right
    TextBox		txtThursday	0.00	TextAlign: Right
    TextBox		txtFriday	0.00	TextAlign: Right
    TextBox		txtSaturday	0.00	TextAlign: Right
    TextBox		txtSunday	0.00	TextAlign: Right
    GroupBox			Payroll Processing
    Label			Hours
    Label			Amount
    Label		btnCalculate	Calculate
    Label			Regular
    TextBox		txtRegularTime	0.00	TextAlign: Right Enabled: False
    TextBox		txtRegularAmount	0.00	TextAlign: Right Enabled: False
    Label			Net Pay:
    TextBox		txtNetPay	0.00	TextAlign: Right Enabled: False
    Label			Overtime
    TextBox		txtOvertime	0.00	TextAlign: Right Enabled: False
    TextBox		txtOvertimeAmount	0.00	TextAlign: Right Enabled: False
    Label		btnClose		AutoSize: False

11. On the form, double-click the Calculate label and implement its event as follows:
    

    namespace PayrollEvaluation1
    {
        public partial class Exercise : Form
        {
            public Exercise()
            {
                InitializeComponent();
            }
    
            private void btnCalculate_Click(object sender, EventArgs e)
            {
                double monday = 0.00, tuesday = 0.00, wednesday = 0.00,
                       thursday = 0.00, friday = 0.00, saturday = 0.00, sunday = 0.00;
                double regularTime = 0.00, overTime = 0.00;
                double regularPay = 0.00, overtimePay = 0.00;
    
                double hourlySalary = 0.00;
    
                // Get the hourly salary. Use exception handling in case the user types a bad value.
                try
                {
                    hourlySalary = double.Parse(txtHourlySalary.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("The value you typed for the salary is invalid. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtHourlySalary.Focus();
                }
    
                /* Get the value for each work dayworked.
                 * . Use exception handling for each text box in case the user types a bad value.*/
                try
                {
                    monday = double.Parse(txtMonday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Monday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtMonday.Focus();
                }
                try
                {
                    tuesday = double.Parse(txtTuesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Tuesday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtTuesday.Focus();
                }
                try
                {
                    wednesday = double.Parse(txtWednesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Wednesday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWednesday.Focus();
                }
                try
                {
                    thursday = double.Parse(txtThursday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Thursday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtThursday.Focus();
                }
    
                try
                {
                    friday = double.Parse(txtFriday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Firday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtFriday.Focus();
                }
    
                try
                {
                    saturday = double.Parse(txtSaturday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Saturday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtSaturday.Focus();
                }
    
                try
                {
                    sunday = double.Parse(txtSunday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Sunday. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtSunday.Focus();
                }
    
                // Calculate the total amount of time the employee worked
                double totalTime = monday + tuesday + wednesday +
                                 thursday + friday + saturday + sunday;
    
                // The overtime is paid time and half
                double ovtSalary = hourlySalary * 1.5;
    
                // If the employee worked below 40 hours, there is no overtime
                if (totalTime < 40)
                {
                    regularTime = totalTime;
                    regularPay  = hourlySalary * regularTime;
                    overTime    = 0.00;
                    overtimePay = 0.00;
                } // If the employee worked over 40 hours, calculate the overtime
                else if (totalTime >= 40)
                {
                    regularTime = 40;
                    regularPay  = hourlySalary * 40;
                    overTime    = totalTime - 40;
                    overtimePay = overTime * ovtSalary;
                }
    
                double netPay = regularPay + overtimePay;
    
                txtRegularTime.Text = regularTime.ToString("F");
                txtOverTime.Text    = overTime.ToString("F");
                txtRegularPay.Text  = regularPay.ToString("F");
                txtOvertimePay.Text = overtimePay.ToString("F");
    
                txtNetPay.Text      = netPay.ToString("F");
            }
        }
    }
    

12. Double-click the Close label and implement its Click event as follows:
    

    private void btnClose_Click(object sender, EventArgs e)
    {
        Close();
    }

13. Execute the application to see the result

    

14. Type a letter in one of the text boxes and click Calculate

    

15. Enter the following values in the text boxes:

    Employee Name: Gertrude Monay
    Hourly Salary: 28.46
    Work Week
        Monday:    8
        Tuesday:   7.5
        Wednesday: 6
        Thursday:  7.5
        Friday:    6.5
        Saturday:  0
        Sunday:    0

    

16. Click the Calculate button:

    

17. Replace the values as follows:

    Employee Name: Thomas Stones
    Hourly Salary: 31.68
    Work Week
        Monday:    8
        Tuesday:   10.5
        Wednesday: 9
        Thursday:  8
        Friday:    8
        Saturday:  0
        Sunday:    0

18. Click the Calculate button:

    

19. Close the form and return to your programming environment

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