Visual C# Examples: Employee Payroll

In this example, we will calculate the overtime worked by an employee of a company. To do this, we will consider each week day with 8 regular hours. If an employee works more than 8 hours in one day, any time over that is considered overtime. In our payroll simulation, we will cover two weeks but each week has its separate calculation. After collecting the time for both weeks and performing the calculation, we will display the number of regular hours, the number of hours worked overtime, the amount pay for the regular hours, and the amount pay for overtime, if any. At the end, we will display the total net pay.

1. Start a new Windows Application named GCSPayroll1
2. Set the form's Icon to Drive:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Graphics\icons\Office\CRDFLE03.ICO
3. Design the form as follows:
    

   Control Name Text Other Properties GroupBox   Employee Identification   Label   Employee #:   TextBox txtEmployeeNbr     Label   Hourly Salary:   TextBox txtHourlySalary     GroupBox   Time Period   Label Starting Date:     DateTimePicker dtpStartingDate     Label End Date:     DateTimePicker dtpEndDate     GroupBox   Time Sheet   Label   Monday   Label   Tuesday   Label   Wednesday   Label   Thursday   Label   Friday   Label   Saturday   Label   Sunday   Label   First Week:   TextBox txtMonday1 0.00 TextAlign: Right TextBox txtTuesday1 0.00 TextAlign: Right TextBox txtWednesday1 0.00 TextAlign: Right TextBox txtThursday1 0.00 TextAlign: Right TextBox txtFriday1 0.00 TextAlign: Right TextBox txtSaturday1 0.00 TextAlign: Right TextBox txtSunday1 0.00 TextAlign: Right Label   Second Week:   TextBox txtMonday2 0.00 TextAlign: Right TextBox txtTuesday2 0.00 TextAlign: Right TextBox txtWednesday2 0.00 TextAlign: Right TextBox txtThursday2 0.00 TextAlign: Right TextBox txtFriday2 0.00 TextAlign: Right TextBox txtSaturday2 0.00 TextAlign: Right TextBox txtSunday2 0.00 TextAlign: Right GroupBox   Payroll Processing   Label   Hours   Label   Amount   Button btnProcessIt Process It   Label   Regular   TextBox txtRegularHours 0.00 TextAlign: Right TextBox txtRegularAmount 0.00 TextAlign: Right Label   Total Earnings   TextBox txtTotalEarnings 0.00 TextAlign: Right Label   Overtime   TextBox txtOvertimeHours 0.00 TextAlign: Right TextBox txtOvertiimeAmount 0.00 TextAlign: Right Button btnClose

4. Double-click the Close button and implement its Click event as follows:
    

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

5. Execute it to test it and then close the form
6. Double-click an unoccupied area of the form and implement its Load event as follows:
    

   private void Form1_Load(object sender, System.EventArgs e) { DateTime todayDate = DateTime.Today; DateTime twoWeeksAgo = todayDate.AddDays(-14); this.dtpStartingDate.Value = twoWeeksAgo; }

7. Return to the form and click the top DateTimePicker control
8. In the Properties window, click the Events button and double-click the CloseUp field
9. Implement the event as follows:
    

   private void dtpStartingDate_CloseUp(object sender, System.EventArgs e) { // Get the starting date DateTime dteStart = this.dtpStartingDate.Value; // Find out if the user selected a day that is not Monday if( dteStart.DayOfWeek != DayOfWeek.Monday ) { MessageBox.Show("The date you selected in invalid\n" + "The time period should start on a Monday"); this.dtpStartingDate.Focus(); } }

10. Return to the form and click the other DateTimePicker control
11. In the Properties window, click the Events button and double-click the CloseUp field
12. Implement the event as follows:
     

    private void dtpEndDate_CloseUp(object sender, System.EventArgs e) { // Get the starting date DateTime dteStart = this.dtpStartingDate.Value; // Get the ending date DateTime dteEnd = this.dtpEndDate.Value; // Make sure the first day of the period is Monday if( dteStart.DayOfWeek != DayOfWeek.Monday ) { MessageBox.Show("The starting date you selected in invalid\n" + "The time period should start on a Monday"); this.dtpStartingDate.Focus(); } // Find the number of days that separate the start and end TimeSpan timeDifference = dteEnd.Subtract(dteStart); double fourteenDaysLater = timeDifference.Days; if( (dteEnd.DayOfWeek != DayOfWeek.Sunday) || (fourteenDaysLater != 13) ) { MessageBox.Show("The ending date you selected in invalid\n" + "The time period should span 2 weeks and end on a Sunday"); this.dtpEndDate.Focus(); } }

13. Return to the form. Double-click the Process It button and implement its Click event as follows:
     

    private void btnPresseIt_Click(object sender, System.EventArgs e) { double monday1 = 0.00, tuesday1 = 0.00, wednesday1 = 0.00, thursday1 = 0.00, friday1 = 0.00, saturday1 = 0.00, sunday1 = 0.00, monday2 = 0.00, tuesday2 = 0.00, wednesday2 = 0.00, thursday2 = 0.00, friday2 = 0.00, saturday2 = 0.00, sunday2 = 0.00; double totalHoursWeek1, totalHoursWeek2; double regHours1 = 0.00, regHours2 = 0.00, ovtHours1 = 0.00, ovtHours2 = 0.00; double regAmount1 = 0.00, regAmount2 = 0.00, ovtAmount1 = 0.00, ovtAmount2 = 0.00; double regularHours, overtimeHours; double regularAmount, overtimeAmount, totalEarnings; double hourlySalary = 0.00; // Retrieve the hourly salary try { hourlySalary = double.Parse(this.txtHourlySalary.Text); } catch(FormatException) { MessageBox.Show("The value you typed for the salary is invalid \n" + "Please try again"); this.txtHourlySalary.Focus(); } // Retrieve the value of each day worked try { monday1 = double.Parse(this.txtMonday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtMonday1.Focus(); } try { tuesday1 = double.Parse(this.txtTuesday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtTuesday1.Focus(); } try { wednesday1 = double.Parse(this.txtWednesday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtWednesday1.Focus(); } try { thursday1 = double.Parse(this.txtThursday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtThursday1.Focus(); } try { friday1 = double.Parse(this.txtFriday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtFriday1.Focus(); } try { saturday1 = double.Parse(this.txtSaturday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtSaturday1.Focus(); } try { sunday1 = double.Parse(this.txtSunday1.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtSunday1.Focus(); } try { monday2 = double.Parse(this.txtMonday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtMonday2.Focus(); } try { tuesday2 = double.Parse(this.txtTuesday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtTuesday2.Focus(); } try { wednesday2 = double.Parse(this.txtWednesday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtWednesday2.Focus(); } try { thursday2 = double.Parse(this.txtThursday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtThursday2.Focus(); } try { friday2 = double.Parse(this.txtFriday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtFriday2.Focus(); } try { saturday2 = double.Parse(this.txtSaturday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtSaturday2.Focus(); } try { sunday2 = double.Parse(this.txtSunday2.Text); } catch(FormatException) { MessageBox.Show("You typed an invalid value\n" + "Please try again"); this.txtSunday2.Focus(); } // Calculate the total number of hours for each week totalHoursWeek1 = monday1 + tuesday1 + wednesday1 + thursday1 + friday1 + saturday1 + sunday1; totalHoursWeek2 = monday2 + tuesday2 + wednesday2 + thursday2 + friday2 + saturday2 + sunday2; // The overtime is paid time and half double ovtSalary = hourlySalary * 1.5; // If the employee worked under 40 hours, there is no overtime if( totalHoursWeek1 < 40 ) { regHours1 = totalHoursWeek1; regAmount1 = hourlySalary * regHours1; ovtHours1 = 0.00; ovtAmount1 = 0.00; } // If the employee worked over 40 hours, calculate the overtime else if( totalHoursWeek1 >= 40 ) { regHours1 = 40; regAmount1 = hourlySalary * 40; ovtHours1 = totalHoursWeek1 - 40; ovtAmount1 = ovtHours1 * ovtSalary; } if( totalHoursWeek2 < 40 ) { regHours2 = totalHoursWeek2; regAmount2 = hourlySalary * regHours2; ovtHours2 = 0.00; ovtAmount2 = 0.00; } else if( totalHoursWeek2 >= 40 ) { regHours2 = 40; regAmount2 = hourlySalary * 40; ovtHours2 = totalHoursWeek2 - 40; ovtAmount2 = ovtHours2 * ovtSalary; } regularHours = regHours1 + regHours2; overtimeHours = ovtHours1 + ovtHours2; regularAmount = regAmount1 + regAmount2; overtimeAmount = ovtAmount1 + ovtAmount2; totalEarnings = regularAmount + overtimeAmount; this.txtRegularHours.Text = regularHours.ToString("F"); this.txtOvertimeHours.Text = overtimeHours.ToString("F"); this.txtRegularAmount.Text = regularAmount.ToString("F"); this.txtOvertimeAmount.Text = overtimeAmount.ToString("F"); this.txtTotalEarnings.Text = totalEarnings.ToString("F"); }

14. Execute the application to test it
     
    
15. After using it, close the form and return to your programming environment