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 PayrollEvaluation2
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			First Week:
    TextBox		txtWeek1Monday	0.00	TextAlign: Right
    TextBox		txtWeek1Tuesday	0.00	TextAlign: Right
    TextBox		txtWeek1Wednesday	0.00	TextAlign: Right
    TextBox		txtWeek1Thursday	0.00	TextAlign: Right
    TextBox		txtWeek1Friday	0.00	TextAlign: Right
    TextBox		txtWeek1Saturday	0.00	TextAlign: Right
    TextBox		txtWeek1Sunday	0.00	TextAlign: Right
    Label			Second Week:
    TextBox		txtWeek2Monday	0.00	TextAlign: Right
    TextBox		txtWeek2Tuesday	0.00	TextAlign: Right
    TextBox		txtWeek2Wednesday	0.00	TextAlign: Right
    TextBox		txtWeek2Thursday	0.00	TextAlign: Right
    TextBox		txtWeek2Friday	0.00	TextAlign: Right
    TextBox		txtWeek2Saturday	0.00	TextAlign: Right
    TextBox		txtWeek2Sunday	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 PayrollEvaluation2
    {
        public partial class Exercise : Form
        {
            public Exercise()
            {
                InitializeComponent();
            }
    
            private void btnCalculate_Click(object sender, EventArgs e)
            {
                double week1Monday    = 0.00, week1Tuesday  = 0.00, week1Wednesday = 0.00,
                       week1Thursday  = 0.00, week1Friday   = 0.00, week1Saturday  = 0.00,
                       week1Sunday    = 0.00, week2Monday   = 0.00, week2Ttuesday  = 0.00,
                       week2Wednesday = 0.00, week2Thursday = 0.00, week2Friday    = 0.00,
                       week2Saturday  = 0.00, week2Sunday   = 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
                {
                    week1Monday = double.Parse(txtWeek1Monday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Monday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Monday.Focus();
                }
                try
                {
                    week1Tuesday = double.Parse(txtWeek1Tuesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Tuesday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    this.txtWeek1Tuesday.Focus();
                }
                try
                {
                    week1Wednesday = double.Parse(txtWeek1Wednesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Wednesday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Wednesday.Focus();
                }
                try
                {
                    week1Thursday = double.Parse(txtWeek1Thursday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Thursday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Thursday.Focus();
                }
    
                try
                {
                    week1Friday = double.Parse(txtWeek1Friday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Firday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Friday.Focus();
                }
    
                try
                {
                    week1Saturday = double.Parse(txtWeek1Saturday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Saturday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Saturday.Focus();
                }
    
                try
                {
                    week1Sunday = double.Parse(txtWeek1Sunday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Sunday of the first week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek1Sunday.Focus();
                }
                try
                {
                    week2Monday = double.Parse(txtWeek2Monday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Monday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Monday.Focus();
                }
                try
                {
                    week2Ttuesday = double.Parse(txtWeek2Tuesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Tuesday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Tuesday.Focus();
                }
                try
                {
                    week2Wednesday = double.Parse(txtWeek2Wednesday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Wednesday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Wednesday.Focus();
                }
                try
                {
                    week2Thursday = double.Parse(txtWeek2Thursday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Thursday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Thursday.Focus();
                }
                try
                {
                    week2Friday = double.Parse(txtWeek2Friday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Friday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Friday.Focus();
                }
                try
                {
                    week2Saturday = double.Parse(txtWeek2Saturday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Saturday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Saturday.Focus();
                }
                try
                {
                    week2Sunday = double.Parse(txtWeek2Sunday.Text);
                }
                catch (FormatException)
                {
                    MessageBox.Show("You typed an invalid value for Sunday of the second week. " +
                                    "Please try again.", "Payroll Evaluation",
                                    MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtWeek2Sunday.Focus();
                }
    
                // Calculate the total number of hours for each week
                double week1TotalTime = week1Monday   + week1Tuesday  + week1Wednesday +
                                        week1Thursday + week1Friday   + week1Saturday  + week1Sunday;
                double week2TotalTime = week2Monday   + week2Ttuesday + week2Wednesday +
                                        week2Thursday + week2Friday   + week2Saturday  + week2Sunday;
    
                // The overtime is paid time and half
                double ovtSalary = hourlySalary * 1.5;
    
                double week1RegularTime = 0.00, week2RegularTime = 0.00,
                       week1OverTime    = 0.00, week2OverTime    = 0.00;
                double week1RegularPay  = 0.00, week2RegularPay  = 0.00,
                       week1OvertimePay = 0.00, week2OvertimePay = 0.00;
    
                // If the employee worked below 40 hours, there is no overtime
                if (week1TotalTime < 40)
                {
                    week1RegularTime = week1TotalTime;
                    week1RegularPay  = hourlySalary * week1RegularTime;
                    week1OverTime    = 0.00;
                    week1OvertimePay = 0.00;
                } // If the employee worked over 40 hours, calculate the overtime
                else if (week1TotalTime >= 40)
                {
                    week1RegularTime = 40;
                    week1RegularPay  = hourlySalary * 40;
                    week1OverTime    = week1TotalTime - 40;
                    week1OvertimePay = week1OverTime * ovtSalary;
                }
    
                if (week2TotalTime < 40)
                {
                    week2RegularTime = week2TotalTime;
                    week2RegularPay  = hourlySalary * week2RegularTime;
                    week2OverTime    = 0.00;
                    week2OvertimePay = 0.00;
                }
                else if (week2TotalTime >= 40)
                {
                    week2RegularTime = 40;
                    week2RegularPay  = hourlySalary * 40;
                    week2OverTime    = week2TotalTime - 40;
                    week2OvertimePay = week2OverTime * ovtSalary;
                }
    
                double regularTime  = week1RegularTime + week2RegularTime;
                double overTime     = week1OverTime + week2OverTime;
                double regularPay   = week1RegularPay + week2RegularPay;
                double overtimePay  = week1OvertimePay + week2OvertimePay;
                
                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. Enter the following values in the text boxes:

    Employee Name: Gertrude Monay
    Hourly Salary: 28.46
    First Week
        Monday:    8
        Tuesday:   7.5
        Wednesday: 6
        Thursday:  7.5
        Friday:    6.5
        Saturday:  0
        Sunday:    0
    Second Week
        Monday:    7
        Tuesday:   8
        Wednesday: 6
        Thursday:  6
        Friday:    8
        Saturday:  0
        Sunday:    0

    

15. Click the Calculate button:

    

16. Replace the values as follows:

    Employee Name: Thomas Stones
    Hourly Salary: 31.68
    First Week
        Monday:    8
        Tuesday:   10
        Wednesday: 9
        Thursday:  8.5
        Friday:    8
        Saturday:  0
        Sunday:    0
    Second Week
        Monday:    9
        Tuesday:   8
        Wednesday: 10.5
        Thursday:  9
        Friday:    8.5
        Saturday:  0
        Sunday:    0

17. Click the Calculate button:

    

18. Close the form and return to your programming environment

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