static void CastingExamples()
{
//A Manager "is-a" System.Object, so we can
//store a Manager reference in an object variable just fine
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
Hexagon hex;
try
{
hex = (Hexagon)frank;
}
catch (InvalidCastException ex)
{
Console.WriteLine(ex.Message);
}
//A Manager "is-an" Employee too
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit); //send as argument - Manager Instead Employee
//A PTSalesPerson "is-a" SalesPerson
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill); //send as argument - PTSalesPerson instead Employee
}
static void Casting()
{
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.WriteLine("=> Casting Rules");
object frank = new Manager("Frank", 9, 3000, 40000, "111111111", 5);
Employee moon = new Manager("Moon", 2, 3001, 20000, "101111111", 10);
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100002, "102111111", 90);
GivePromotion(moon); GivePromotion(jill);
GivePromotion((Manager)frank);
object obj = new object();
try
{
GivePromotion((Manager)obj);
}
catch (Exception e)
{
Console.WriteLine($"Erorr for GiveGromotion(obj): {e.Message}");
}
Console.WriteLine($"Types: frank <{frank.GetType().Name}>, moon <{moon.GetType()}>, jill <{jill.GetType().Name}>, obj <{obj.GetType()}>");
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
// A Manager "is-an" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
// Hexagon hex = (Hexagon)frank;
// Use "as" to test compability.
Hexagon hex2 = frank as Hexagon;
if (hex2 == null)
{
Console.WriteLine("Sorry, frank is not a Hexagon...");
}
}
static void Main(string[] args)
{
Console.WriteLine("***** The Employee Class Hierarchy *****\n");
SalesPerson fred = new SalesPerson();
fred.Age = 32;
fred.Name = "Fred";
fred.SalesNumber = 50;
Manager chucky = new Manager("Chucky", 50, 92, 100000, "333-23-2332", 9000);
chucky.GiveBonus(300);
chucky.DisplayStats();
Console.WriteLine();
SalesPerson frank = new SalesPerson("Frank", 43, 93, 3000, "932-23-3232", 31);
frank.GiveBonus(200);
frank.DisplayStats();
CastingExamples();
//Привести объект Manager к объекту Hexagon невозможно
//но этот код нормально скомпилируется!
try
{
object ted = new Manager();
Hexagon hex = (Hexagon)ted;
}
catch (InvalidCastException ex)
{
Console.WriteLine($"{ex.Message}\n");
}
//Использование ключевого слова as для проверки совместимости приводимых типов
object[] things = new object[5];
things[0] = new SalesPerson();
things[1] = false;
things[2] = new Manager();
things[3] = "Last thing";
things[4] = new PTSalesPerson();
foreach (object item in things)
{
Employee h = item as SalesPerson;
if (h == null)
{
Console.WriteLine($"Item is not SalesPerson");
}
else
{
Console.WriteLine($"{item} is SalesPerson");
}
}
Console.ReadLine();
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
// Error!
//GivePromotion(frank);
// OK!
GivePromotion((Manager)frank);
// Ack! You can't cast frank to a Hexagon, but this compiles fine!
//Hexagon hex = (Hexagon)frank;
// Catach a possible invalid cast.
Hexagon hex;
try
{
hex = (Hexagon)frank;
}
catch (InvalidCastException ex)
{
Console.WriteLine(ex.Message);
}
// Use "as" to test compatability.
object[] things = new object[4];
things[0] = new Hexagon();
things[1] = false;
things[2] = new Manager();
things[3] = "Last thing";
foreach (object item in things)
{
Hexagon h = item as Hexagon;
if (h == null)
{
Console.WriteLine("Item is not a hexagon");
}
else
{
h.Draw();
}
}
// A Manager "is-a" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
}
static void CastingExamples()
{
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1118", 90);
GivePromotion(moonUnit);
GivePromotion(jill);
GivePromotion((Manager)frank);
}
// Populate an initial set of Employees
void InitialEmployees()
{
// Create Employees
Executive dan = new Executive("Dan", "Brown", DateTime.Parse("3/20/1963"), 200000, "121-12-1211", 50000, ExecTitle.CEO);
Executive connie = new Executive("Connie", "Chung", DateTime.Parse("2/5/1972"), 150000, "229-67-7898", 40000, ExecTitle.CFO);
Manager chucky = new Manager("Chucky", "Jones", DateTime.Parse("4/23/1967"), 100000, "333-23-2322", 9000);
Manager mary = new Manager("Mary", "Williams", DateTime.Parse("5/9/1963"), 200000, "121-12-1211", 9500);
Engineer bob = new Engineer("Bob", "Roe", DateTime.Parse("6/30/1986"), 120000, "334-24-2422", DegreeName.MS);
SalesPerson fran = new SalesPerson("Fran", "Smith", DateTime.Parse("7/5/1975"), 80000, "932-32-3232", 31);
PTSalesPerson sam = new PTSalesPerson("Sam", "Abbott", DateTime.Parse("8/11/1984"), 20000, "525-76-5030", 20);
PTSalesPerson sally = new PTSalesPerson("Sally", "McRae", DateTime.Parse("9/12/1979"), 30000, "913-43-4343", 10);
SupportPerson mike = new SupportPerson("Mike", "Roberts", DateTime.Parse("10/31/1975"), 15000, "229-67-7898", ShiftName.One);
SupportPerson steve = new SupportPerson("Steve", "Kinny", DateTime.Parse("11/21/1982"), 80000, "913-43-4343", ShiftName.Two);
// Bonuses and promotions
dan.GiveBonus(1000);
bob.GiveBonus(500);
sally.GiveBonus(400);
dan.GivePromotion();
chucky.GivePromotion();
fran.GivePromotion();
// Add reports - just report error and continue on exception
try
{
dan.AddReport(chucky);
dan.AddReport(mary);
connie.AddReport(fran);
connie.AddReport(sally);
mary.AddReport(sam);
mary.AddReport(mike);
chucky.AddReport(bob);
chucky.AddReport(steve);
}
catch (Exception e)
{
MessageBox.Show($"Error adding reports: {e.Message}");
}
// Add Expenses
dan.Expenses.Add(new Expense(DateTime.Parse("1/25/2017"), ExpenseCategory.Travel, "Airline Tickets - San Diego", 300.55));
dan.Expenses.Add(new Expense(DateTime.Parse("1/27/2017"), ExpenseCategory.Meals, "Breakfast at Hotel", 27.61));
dan.Expenses.Add(new Expense(DateTime.Parse("1/29/2017"), ExpenseCategory.Lodging, "Conference Hotel - 5 nights", 423.15));
// Add Employees to list
List <Employee> emps = new List <Employee>()
{
dan, connie, chucky, mary, bob, fran, sam, sally, mike, steve
};
foreach (Employee e in emps)
{
Add(e);
}
}
public void CastingExamples()
{
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
SalesPerson jill = new PTSalesPerson("Jill", 834, 3001, 100000, "111-12-1119", 90);
GivePromotion(jill);
}
static void CastingExamples()
{
// Manager "is-a" System.Object, so we can
// store a manager reference in an onject variable
object frank = new Manager("Frank", 9, 300, 40000, "111-11-111", 5);
// A Manager "is-an" Employee too
Employee moonUnit = new Manager("MoonUnit", 2, 3001, 2000, "111-11-1234", 1);
// A PTSalesPerson "is-a" SalesPerson
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 10000, "1231", 90);
}
static void CastingExamples()
{
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "222-22-2222", 5);
//Manager "is-an" employee too
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
//PTSales "is-an" SalesPerson too
SalesPerson Jill = new PTSalesPerson("Jill", 834, 3002, 10000, "111-12-1119", 90);
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3012, 40000, "1978-06-27-4572", 5);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "1897-04-13-5167", 1);
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "2017-06-2673", 90);
GivePromotion(moonUnit);
GivePromotion(jill);
// To promote frank we need to use an explicit class.
GivePromotion((Manager)frank);
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
// A Manager "is-an" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
// A Manager "is-an" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
}
static void FunWithCasting()
{
// A Manager "is-a" System.Object.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
// A Manager "is-a" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
// Streamline the staff.
FireThisPerson(moonUnit);
FireThisPerson(jill);
FireThisPerson((Manager)frank);
}
public static int Main(string[] args)
{
Console.WriteLine("These folks work at " + Employee.Company);
Console.WriteLine();
// Uncomment to test abstract base class.
// Employee e = new Employee();
Manager chucky = new Manager("Chucky", 92, 100000, "333-23-2322", 9000);
chucky.GiveBonus(300);
chucky.DisplayStats();
Console.WriteLine();
SalesPerson fran = new SalesPerson("Fran", 93, 30000, "932-32-3232", 31);
fran.GiveBonus(201);
fran.DisplayStats();
// Casting!
// A Manager 'is-a' object.
object o = new Manager("Frank Zappa", 9, 40000, "111-11-1111", 5);
// A Manager 'is-a' Employee too.
Employee e = new Manager("MoonUnit Zappa", 2, 20000, "101-11-1321", 1);
// A PTSales dude(tte) is a Sales dude(tte)
SalesPerson sp = new PTSalesPerson("Jill", 834, 100000, "111-12-1119", 90);
FireThisPerson(e);
FireThisPerson(sp);
// Error! Must cast when moving from base to derived!
// FireThisPerson(o);
FireThisPerson((Employee)o);
// Numerical casts...
int x = 30000;
byte b = (byte)x; // Loss of information here…
return(0);
}
static void CastingExamples()
{
object frank = new Manager("Frank", 93, 12, 34.3f, 18);
Employee kurt = new Manager("Kurt", 23, 1, 13, 8);
GivePromotion(kurt);
SalesPerson nick = new PTSalesPerson("Nick", 45, 15, 18, 29);
GivePromotion(nick);
GivePromotion((Manager)frank);
PTSalesPerson pt = frank as PTSalesPerson;
if (pt == null)
{
Console.WriteLine("Frank is not a sales manager");
}
}
static List <Employee> InitialEmployees()
{
Executive dan = new Executive("Dan", "Doe", DateTime.Parse("3/20/1963"), 200000, "121-12-1211", 50000, ExecTitle.CEO);
Executive connie = new Executive("Connie", "Chung", DateTime.Parse("2/5/1972"), 150000, "229-67-7898", 40000, ExecTitle.CFO);
Manager chucky = new Manager("Chucky", "Kirkland", DateTime.Parse("4/23/1967"), 100000, "333-23-2322", 9000);
Manager mary = new Manager("Mary", "Tompson", DateTime.Parse("5/9/1963"), 200000, "121-12-1211", 9500);
Engineer bob = new Engineer("Bob", "Pirs", DateTime.Parse("6/30/1986"), 120000, "334-24-2422", DegreeName.MS);
SalesPerson fran = new SalesPerson("Fran", "Smith", DateTime.Parse("7/5/1975"), 80000, "932-32-3232", 31);
PTSalesPerson sam = new PTSalesPerson("Sam", "Abbot", DateTime.Parse("8/11/1984"), 20000, "525-76-5030", 20);
PTSalesPerson sally = new PTSalesPerson("Sally", "McRae", DateTime.Parse("9/12/1979"), 30000, "913-43-4343", 10);
SupportPerson mike = new SupportPerson("Mike", "Roberts", DateTime.Parse("10/31/1975"), 15000, "229-67-7898", ShiftName.One);
SupportPerson steve = new SupportPerson("Steve", "Kinny", DateTime.Parse("11/21/1982"), 80000, "913-43-4343", ShiftName.Two);
// Bonuses and promotions
dan.GiveBonus(1000);
bob.GiveBonus(500);
sally.GiveBonus(400);
dan.GivePromotion();
chucky.GivePromotion();
fran.GivePromotion();
// Add reports - just report error and continue on exception
try
{
dan.AddReport(chucky);
dan.AddReport(mary);
connie.AddReport(fran);
connie.AddReport(sally);
mary.AddReport(sam);
mary.AddReport(mike);
chucky.AddReport(bob);
chucky.AddReport(steve);
}
catch (Exception e)
{
Console.WriteLine($"Error when adding reports: {e.Message}");
}
return(new List <Employee>()
{
dan, connie, chucky, mary, bob, fran, sam, sally, mike, steve
});
//return new List<Employee>() { dan, connie, chucky };
}
static void CastingExamples()
{
//Manager是(is-a) System.Object,因此我们刚好可以在object变量中存储Manage引用
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
//Manager同样是Employee
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// PTSalesPerson是SalesPerson
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
}
static void CastingExamples()
{
//Manager является System.Object, поэтому в переменной
//типа Object можно хранить ссылку на Manager
object fran = new Manager("Fran Zappa", 9, 3000, 40000, "111-11-1111", 5);
//GivePromotion(fran) - Ошибка! Object не является Manager
GivePromotion((Manager)fran); //Верно! Явное приведение
//Manager также является Employee
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit); //Пример неявного приведения
//PTSalesPerson является SalesPerson
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1191", 90);
GivePromotion(jill); //Примеры неявного приведения
}
static void CastingExamples()
{
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
Salesperson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90, 4);
PTSalesPerson TestPTSP = new PTSalesPerson("TestPTSP", 22, 99, 20000, "13337", 20, 4);
GivePromotion((Manager)frank);
GivePromotion((Salesperson)TestPTSP);
Salesperson sp = frank as Salesperson;
if (sp == null)
{
Console.WriteLine("Sorry, frank is not a salesperson...");
}
}
static void CastingExamples()
{
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
GivePromotion((Manager)frank);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
//PtSalesPerson "является" SalesPerson
Salesperson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111 - 12 - 1119", 90);
GivePromotion(jill);
// Использование as для проверки соместимости.
Salesperson hex2 = frank as Salesperson;
if (hex2 == null)
{
Console.WriteLine("Sorry, frank is not a Salesperson");
}
}
static void Subclasses()
{
Console.ForegroundColor = ConsoleColor.Green;
SalesPerson fred = new SalesPerson {
Age = 31, Name = "Fred", SalesNumber = 50
};
Console.WriteLine($"SalesPerson: {fred.Name}, {fred.SalesNumber}, {fred.Age}");
PTSalesPerson jason = new PTSalesPerson {
Age = 26, Name = "Jason", SalesNumber = 35
};
Console.WriteLine($"Part-time SalesPerson: {jason.Name}, {jason.SalesNumber}, {jason.Age}");
Manager chucky = new Manager("Chucky", 50, 92, 100000, "333-23-2322", 9000);
Console.WriteLine($"Manager: {chucky.Name}, {chucky.StockOptions}, {chucky.Age}");
}
static void Main(string[] args)
{
Console.WriteLine("***** The Employee Class Hierarchy ******\n");
Salesperson fred = new Salesperson();
fred.Age = 31;
fred.Name = "Fred";
fred.SalesNumber = 50;
Manager chucky = new Manager("Chucky", 50, 92, 100000, "333-23-2322", 9000);
double cost = chucky.GetBenefitCost();
Console.WriteLine("Chucky benefit cost: {0}", cost);
PTSalesPerson TestPTSP = new PTSalesPerson("Alex", 24, 93, 500000, "1337-1337", 4000, 4);
Console.WriteLine("SalesPerson {0} works {1} hours / day", TestPTSP.Name, TestPTSP.WorkHours);
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** The Employee Class Hierarchy ****\n");
Manager chucky = new Manager("Cucky", 50, 92, 100000, "333-23-2322", 9000);
chucky.GiveBonus(300);
chucky.DisplayStats();
Console.WriteLine();
SalesPerson fran = new SalesPerson("Fran", 43, 93, 300, "932-32-3232", 31);
fran.GiveBonus(200);
fran.DisplayStats();
// A Manager "is-a" System.Object, so we can
// store a Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "123", 5);
GivePromotion((Manager)frank); // explicit casting, yay!
//A Manager "is-an" Employee too
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "567", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson
SalesPerson jill = new PTSalesPerson("Jill", 834, 30001, 123123, "123124", 90);
GivePromotion(jill);
// Use "as" to test compatability
/* Hexagon hex2 = frank as Hexagon;
* if (hex2 == null)
* Console.WriteLine("Sorry, frank is not a Hexagon...");
*/
Console.ReadLine();
}
static void CastingExamples() {
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
//GivePromotion(frank);//doesn't work bc "frank" is stored in a System.Object, which is higher up
//than Employee on the inheritance chain, so an implicit cast can't happen...
//instead we must EXPLICITLY cast it along the lines of (ClassIWantToCastTo)referenceIHave...
//even though it makes NO sense to cast frank to a Hexagon, you can!
//***Hexagon hex = (Hexagon)frank;*** and it compiles!
//Nothing would blow up until runtime when you'd get an exception
//When you are explicitly casting you can use a try/catch to check for compatibility...
//Hexagon hex;
//try
//{
// hex = (Hexagon)frank;
//}
//catch (InvalidCastException ex)
//{
// Console.WriteLine(ex.Message); }
//you can also test for compatibility via the "as" keyword...
//object[] things = new object[4];
//things[0] = new Hexagon();
//things[1] = false;
//things[2] = new Manager();
//things[3] = "Last Thing";
//foreach (object item in things)
//{
// Hexagon h = item as Hexagon;
// if (h == null)
// {
// Console.WriteLine("Item is not a hexagon");
// }
// else
// h.Draw();
//}
//comparisons can also be made with the "is" keyword. This checks for a return of flase, rather
//than a null value as was seen with "as" keyword. "is" doesn't doesn't perform a cast, it just
//checks compatibility so that you can subsequenly cast as you like(w/o a PITA try/catch)
GivePromotion((Manager)frank);
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1111", 1);
GivePromotion(moonUnit);
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 10000, "111-22-3333", 90);
GivePromotion(jill);
}
static void CastingExamples()
{
// A Manager "is-a" System.Object, so we can store a
// Manager reference in an object variable just fine.
object frank = new Manager("Frank Zappa", 9, 3000, 40000, "111-11-1111", 5);
// Error! Cannot pass 'System.Object' to 'Employee'
//GivePromotion(frank);
// OK!
GivePromotion((Manager)frank);
// A Manager "is-an" Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 2, 3001, 20000, "101-11-1321", 1);
GivePromotion(moonUnit);
// A PTSalesPerson "is-a" SalesPerson.
SalesPerson jill = new PTSalesPerson("Jill", 834, 3002, 100000, "111-12-1119", 90);
GivePromotion(jill);
// Ack! You can't cast frank to a Hexagon, but this
// compiles fine!
// Would recieve runtime exception.
frank = new Manager();
//Hexagon hex = (Hexagon)frank;
// Catch a possible invalid cast.
Hexagon hex;
try
{
hex = (Hexagon)frank;
}
catch (InvalidCastException ex)
{
Console.WriteLine(ex.Message);
}
// Use "as" to test compatibilty.
// "as" returns a null reference.
object[] things = new object[4];
things[0] = new Hexagon();
things[1] = false;
things[2] = new Manager();
things[3] = "Last thing";
foreach (object item in things)
{
Hexagon h = item as Hexagon;
if (h == null)
{
Console.WriteLine("Item is not a hexagon");
}
else
{
h.Draw();
}
}
// Discards with the "is" keyword
// use as catchall in if or switch statement
if (frank is var _)
{
// do something
}
}
static void Main(string[] args)
{
#region Uncomment to test abstract base class.
// Employee e = new Employee();
// Uncomment to test readonly field.
// Employee brenner = new Employee();
// brenner.SSNField = "666-66-6666";
#endregion
Console.WriteLine("***** These folks work at {0} *****",
Employee.Company);
Manager chucky = new Manager("Chucky", 35, 92, 100000, "333-23-2322", 9000);
chucky.GiveBonus(300);
chucky.DisplayStats();
chucky.Age++; // Happy birthday Chuck!
Console.WriteLine();
SalesPerson fran = new SalesPerson("Fran", 26, 93, 30000, "932-32-3232", 31);
fran.GiveBonus(200);
fran.DisplayStats();
Console.WriteLine();
#region Casting examples
Console.WriteLine("***** Casting examples *****");
// A Manager 'is-a' object.
object frank = new Manager("Frank Zappa", 50, 9, 40000, "111-11-1111", 5);
// A Manager 'is-a' Employee too.
Employee moonUnit = new Manager("MoonUnit Zappa", 16, 2, 20000, "101-11-1321", 1);
// A PTSales dude(tte) is a Sales dude(tte)
SalesPerson jill = new PTSalesPerson("Jill", 30, 834, 100000, "111-12-1119", 90);
// Cast from the generic System.Object into a strongly
// typed Manager.
Console.WriteLine("***** Counting frank's stock options *****");
Manager mgr = (Manager)frank;
Console.WriteLine("Frank's options: {0}", mgr.NumbOpts);
Console.WriteLine("Frank's options: {0}",
((Manager)frank).NumbOpts);
Console.WriteLine("\n***** Firing employees using casting operations! *****");
TheMachine.FireThisPerson(moonUnit);
Console.WriteLine();
TheMachine.FireThisPerson(jill);
Console.WriteLine();
// Error! Must cast when moving from base to derived!
// TheMachine.FireThisPerson(frank);
TheMachine.FireThisPerson((Employee)frank);
Console.WriteLine();
#endregion
// Creating a (very) nested BenefitPackageLevel enum variable.
Employee.BenefitPackage.BenefitPackageLevel myBenifitLevel =
Employee.BenefitPackage.BenefitPackageLevel.Platinum;
Console.ReadLine();
}
static void Main()
{
Console.WriteLine("***** Assignment 4: Employee Reports *****\n");
// Create Employees
Manager chucky = new Manager("Chucky", 50, 92, 100000, "333-23-2322", 9000);
Manager mary = new Manager("Mary", 54, 90, 200000, "121-12-1211", 9500);
SalesPerson fran = new SalesPerson("Fran", 43, 93, 80000, "932-32-3232", 31);
SalesPerson bob = new SalesPerson("Bob", 31, 94, 120000, "334-24-2422", 30);
PTSalesPerson sally = new PTSalesPerson("Sally", 32, 95, 30000, "913-43-4343", 10);
PTSalesPerson sam = new PTSalesPerson("Sam", 33, 96, 20000, "525-76-5030", 20);
PTSalesPerson mike = new PTSalesPerson("Mike", 45, 91, 15000, "229-67-7898", 30);
// Employee list
Employee[] emps = { chucky, mary, fran, bob, sally, sam, mike };
// Add reports
try
{
mary.AddReport(fran);
mary.AddReport(mike);
chucky.AddReport(bob);
chucky.AddReport(sally);
chucky.AddReport(sam);
mary.RemoveReport(fran);
mary.RemoveReport(chucky);
chucky.AddReport(fran);
chucky.AddReport(mike);
chucky.AddReport(mary);
}
catch (Manager.TooManyReportsException e)
{
Console.WriteLine("*** Error! ***");
Console.WriteLine("Source: {0}", e.Source);
Console.WriteLine("Method: {0}", e.TargetSite);
Console.WriteLine("Message: {0}", e.Message);
Console.WriteLine("Custom Data:");
foreach (DictionaryEntry de in e.Data)
{
Console.WriteLine("-> {0}: {1}", de.Key, de.Value);
}
}
Console.WriteLine("\nDisplay Managers\n");
mary.DisplayStats();
Console.WriteLine();
chucky.RemoveReport(sam); // Remove a report for testing
chucky.DisplayStats();
Console.Write("Reports by Name: ");
foreach (Employee emp in chucky.ReportsByName())
{
Console.Write("{0} ", emp.Name);
}
Console.Write("\nReports by Age: ");
foreach (Employee emp in chucky.ReportsByAge())
{
Console.Write("{0}-{1} ", emp.Age, emp.Name);
}
Console.Write("\nReports by Pay: ");
foreach (Employee emp in chucky.ReportsByPay())
{
Console.Write("{0:C}-{1} ", emp.Pay, emp.Name);
}
Console.WriteLine();
Console.ReadLine();
}
public CompDetails(Object data) : this()
{
this.DataContext = data;
if (data is Employee)
{
string name = "";
string value = "";
if (data is Manager)
{
Manager man = (Manager)data;
name = "Reports";
string options = "Stock Options";
// Set spare prop name and value
man.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = man.ReportsByName();
this.SpareProp2Name.Content = options;
this.SpareProp2Value.Content = man.StockOptions;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
this.SpareProp2Name.Visibility = Visibility.Visible;
this.SpareProp2Value.Visibility = Visibility.Visible;
}
if (data is Executive)
{
Executive exe = (Executive)data;
name = "Reports";
string options = "Stock Options ";
// Set spare prop name and value
exe.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = exe.ReportsByName();
this.SpareProp2Name.Content = options;
this.SpareProp2Value.Content = exe.StockOptions;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
this.SpareProp2Name.Visibility = Visibility.Visible;
this.SpareProp2Value.Visibility = Visibility.Visible;
}
if (data is Engineer)
{
Engineer eng = (Engineer)data;
name = "Highest Degree";
// Set spare prop name and value
eng.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = eng.HighestDegree;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
}
if (data is SalesPerson)
{
SalesPerson sales = (SalesPerson)data;
name = "Number of Sales";
// Set spare prop name and value
sales.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = sales.SalesNumber;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
}
if (data is PTSalesPerson)
{
PTSalesPerson pTSales = (PTSalesPerson)data;
name = "Number of Sales";
// Set spare prop name and value
pTSales.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = pTSales.SalesNumber;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
}
if (data is SupportPerson)
{
SupportPerson support = (SupportPerson)data;
name = "Shift: ";
// Set spare prop name and value
support.GetSpareProp1(ref name, ref value);
this.SpareProp1Name.Content = name;
this.SpareProp1Value.Content = support.Shift;
// Make visible after setting values
this.SpareProp1Name.Visibility = Visibility.Visible;
this.SpareProp1Value.Visibility = Visibility.Visible;
}
}
}