// Delete employee button
private void BtnDeleteEmployee_Click(object sender, EventArgs e)
{
// Locating the selected employee in the list box and deleting it
ClsEmployeeDetails lcEmplyeeDetails = (ClsEmployeeDetails)LstEmployees.SelectedItem;
// If the list is empty display message box saying there are no employees to delete
if (lcEmplyeeDetails == null)
{
DialogResult NoEmployeeToDelete = MessageBox.Show("There are no employees to delete", "No Employees",
MessageBoxButtons.OK, MessageBoxIcon.Error);
if (NoEmployeeToDelete == DialogResult.OK)
{
return;
}
}
else
{
// Display message box asking if user wants to delete an employee first
DialogResult DeletingEmployeeMessage = MessageBox.Show("You are about to delete an employee, are you sure you want to do this?", "Deleting Employee",
MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
// If user selects yes
if (DeletingEmployeeMessage == DialogResult.Yes)
{
// Call delete employee method
DeleteEmployee();
}
else
{
// Else close the message box and dont delete because the user clicked no
return;
}
}
}
// Delete employee details
private void DeleteEmployee()
{
// Find the selected employee in the list
ClsEmployeeDetails lcEmployeeDetails = (ClsEmployeeDetails)LstEmployees.SelectedItem;
// Remove the selected employee
ClsEmployeeList.EmployeeList.Remove(lcEmployeeDetails.ID);
// Update the list box to show that the employee has been removed
UpdateDisplay();
}
// Execute when we want this form to display itself, we now have show dialog to return a boolean rather than a dialog result due to the classes now call show dialog,
// If we continue to use dialog result in our classes then we would need a refernce to window forms which is called talking to strangers and is poor style
public bool ShowDialog(ClsEmployeeDetails prEmployeeDetails)
{
// Storing the parameter value in our member variable _EmployeeDetails
_EmployeeDetails = prEmployeeDetails;
// Calling the update display method
UpdateDisplay();
// Default method, this will return OK or cancel depends on what the user clicks on
// This now returns a bool true/false
return(ShowDialog() == DialogResult.OK);
}
// Edit employee details, now accepts an employee parameter
private void EditEmployeeDetails()
{
// Locating the selected employee in the list box and editing it
ClsEmployeeDetails lcEmplyeeDetails = (ClsEmployeeDetails)LstEmployees.SelectedItem;
// If employee is not empty we edit it
if (lcEmplyeeDetails != null && lcEmplyeeDetails.ViewEdit())
{
// Call update display method
UpdateDisplay();
}
}
// Create employee method
private void CreateEmployee()
{
// We create a new employee by calling the factory method NewEmployee in ClsEmployeeDetails and stroing it in the local variable lcEmployeeDetails
ClsEmployeeDetails lcEmployeeDetails = ClsEmployeeDetails.NewEmployee(CboEmployeeType.SelectedIndex);
// If the user didn't cancel
if (lcEmployeeDetails != null && lcEmployeeDetails.ViewEdit())
{
// Add the new employee details to the list box, as we are adding to a dictionary we need to put the key in
ClsEmployeeList.EmployeeList.Add(lcEmployeeDetails.ID, lcEmployeeDetails);
// Then we update the display to show the new employee in teh list box
UpdateDisplay();
}
}
// Modify employee button
private void BtnModifyEmployee_Click(object sender, EventArgs e)
{
// Locating the selected employee in the list box and editing it
ClsEmployeeDetails lcEmplyeeDetails = (ClsEmployeeDetails)LstEmployees.SelectedItem;
// If no employees exist
if (lcEmplyeeDetails == null)
{
// Call the message box method and display it
NoEmployeeToEdit();
}
else
{
// Else edit the employe details
EditEmployeeDetails();
}
}