Homework 4 (C# Interfaces and Collections)

Ø Make a stepwise refinement, WinEmployee4.exe Windows App, that manages Employee data. The App is demonstrated without source by Homework4.exe

Ø (40) Make the Employees enumerable

§ Make Employees IEnumerable

§ Instead of an Array, change the internals to use some System.Collection such as ArrayList, and foreach when iterating in the code base.

§ Do this in a new container class Employs. Employs will be much like the “Cars” container class in Troelsen.

§ Employs methods should include

§ public void AddEmployee( Employee emp)

§ public void RemoveEmployee( int EmpID)

§ public int Count; // property, employee count

§ public void ClearAll()

§ public bool Present( Employee emp) // Exists already?

§ Update the payroll calculations and other methods as needed

Ø The new “foreach” IEnumerable capability should be demonstrated in the payroll calculation (see below).

Ø (25) Improve the Employee find capability

§ Employs should have a “Find by ID” and “Name Pattern Match” employee lookup capability methods

§ public Employee WithID( int EmpID) // ID search

§ public Employee FindName( string NamePattern) // Regex for Name is preferred

Ø (25) Add a new BonusInfo C# class that has properties that will get and set bonus amounts for all the Employee derived types, and a method to Clear bonus amounts

§ The legal Bonus ranges are:

§ Manager- 2000.00 max

§ Sales- 4000.00 max

§ PT Sales- 1000.00 max

§ HR- 500.00 max

§ Consultant-1000.00 max

Ø The BonusInfo object basically has 5 entries, one for each Employee derived type. The BonusInfo object is maintained by a single “Bonus” entry Button (and textbox) for each Employee type, and the textbox entry is checked for validity against the values above (and a custom Exception thrown and handled for bad values). A separate “Reset Bonuses” button will clear all BonusInfo entries to zero.

Ø (10) Add a C# Custom Exception “BonusRangeException” to WinEmployee that is used when checking the range of bonus entries, upon bonus entry

§ Use the “BonusRangeException” for all BonusInfo properties

Ø Any bonus calculation will be taken (an exact match to the Homework 4 demo is not required). The BonusInfo data should be used in some way for the bonus.
As an example of a possible new calculation for any Manager’s or Sales Persons’s salary:
Individual Employee’s salary = bonus + base_salary ;

managers bonus = (bonus from BonusInfo object for all Managers)
sales bonus =
(bonus per sale, from BonusInfo object) *
(sales bonus amount, from SalesPerson Employee object);

NOTE BENE: Future assignments will build on the current Employee App

§ The Employees class will be improved to

§ Have name, ID, and other indexers; and a “++” operator

§ Be written and recovered to a file

§ Be written and recovered to an ADO.NET database

§ Have much more appropriate GUI elements

§ Much more