static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculatedLeveledDiscount, AlertUser):C2}");
Console.WriteLine();
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subtotal for cart 2 is {subTotal:c2}"),
(products, subTotal) =>
{
if (products.Count > 3)
{
return(subTotal * 0.5m);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 alert {message}"));
Console.WriteLine($"The total for the 2 cart is {total}");
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
// Display way 1:
private void messageBoxDemoButton_Click(object sender, EventArgs e)
{
// this is benefits of deleagetes. we can use ShoppingCartModel with ConsoleUI or WinFormUI.
decimal total = cart.GenerateTotal(SubTotalAlert, CalculateLevelDiscount, PrintOutDiscountAlert);
MessageBox.Show($"Total is : {Math.Round(total)}");
}
static void Main()
{
PopulateCartWithDemoData();
//passing in just the name of the method without any parentheses <- delegate passing
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser)}");
Console.WriteLine();
//passing in an anonymous method - shorthand
//the delegate cares only about output and input types.
//passing in subTotal to a method without a name the arrow describes the logic behind the method.
//the same goes for (products, subTotal) and (message).
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subtotal for cart 2 is {subTotal}"),
(products, subTotal) => {
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 Alert: { message }"));
Console.WriteLine($"The total for cart 2 is {total}");
Console.WriteLine();
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlter, CalculatedDiscount, AlertUser)}");
Console.WriteLine();
// Passing new functions
decimal total = cart.GenerateTotal(
(subTotal => Console.WriteLine($"Subtotal for cart 2: {subTotal}")),
((products, subTotal) => {
if (products.Count > 2)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
}
),
(message => Console.WriteLine($"Cart 2: {message}"))
);
Console.WriteLine($"Total for cart 2: {total}");
Console.ReadLine();
}
static void Main(string[] args)
{
PopulateCartWithItems();
Console.WriteLine($"Total cost for the items (after discount) {cart.GenerateTotal(SubtotalAlert, calculateDiscount, Alert):C2}");
//representing the call above with anoymous methods
decimal finaltotal = cart.GenerateTotal(
(subtotal) => Console.WriteLine($"Cart2: The subtotal is {subtotal:C2}"),
(products, subtotal) =>
{
if (products.Count > 3)
{
return(subtotal * 0.5M);
}
else
{
return(subtotal);
}
},
(alertmsg) => Console.WriteLine($"Cart2: alert: {alertmsg}"));
Console.WriteLine($"Cart2: Total cost for the items {finaltotal:C2}");
Console.ReadLine();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert,LeveledDiscountCalculation,AlertUserWithExclamation):C2}");
Console.WriteLine();
decimal total = cart.GenerateTotal(
(subTotal => Console.WriteLine($"The subtotal for cart 2 is {subTotal:C2}")),
(products, subTotal) => {
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 alert : {message} "));
Console.WriteLine($"The total for Cart 2 = {total:C2}");
//subTotal is parameter name passed to the annonymous function,
//lambda expression- unnamed function we can pass, since delegate doesn't matter about the name just in ant out types.
//2nd argument is passed Func, the "{}" allow us to have multiple lines of code
Console.WriteLine();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
//C2 Where C is currency (US Dollar) and 2 is the decimal place
//SubTotalAlert method is being passed to GenerateTotal.
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser):C2}");
Console.WriteLine();
//Another way to use delegates, creating an inline method (Anonymous method) or shorthand.
//This is the same way as - cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser):C2} but just shorthand and calculates discount differently.
//We don't need to name all delegates, a delegate just cares about the in types (params) and the return type.
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subTotal for cart 2 is {subTotal:C2}"),
(products, subTotal) => {
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 Alert: {message}"));
Console.WriteLine($"The total for cart 2 is {total:C2}");
Console.WriteLine();
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount,AlertUser):C2}");
Console.WriteLine();
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subtotal for cart 2 is {subTotal:C2}"),
(products, subTotal) =>
{
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 Alert: { message}"));
Console.WriteLine($"The total for cart 2 is {total:C2}");
Console.WriteLine();
IEnumerable <ProductModel> cartItems = cart.Items;
Console.WriteLine($"The Highest product price is {cartItems.Max(x => x.Price):C2}");
Console.WriteLine("Please press any key");
Console.ReadLine();
}
static void Main()
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser):C2}");
Console.WriteLine();
Console.WriteLine($"The total for the cart 2 is {cart.GenerateTotal((subTotal) => Console.WriteLine($"The Subtotal for cart 2 is {subTotal:C2}"),(items, subTotal) => subTotal * 0.50M,(message) => Console.WriteLine(message))}");
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
// we have 3 diffrent deleagete.
// One is simple way of doing with delegate keyword
// other one is Func<> and
// the other one is Action<>
// (SubTotalAlert, CalculateLevelDiscount, AlertUser)
static void Main(string[] args)
{
PopulateCartWithDemoData();
// Display Way 1: passing 3 created methods to generatetotal SubTotalAlert, CalculateLevelDiscount, AlertUser
Console.WriteLine($"Total for the cart is (included discount) : {Math.Round(cart.GenerateTotal(SubTotalAlert, CalculateLevelDiscount, AlertUser),2)}");
Console.WriteLine();
// Display way 2: instead of passing 3 method (SubTotalAlert, CalculateLevelDiscount, AlertUser)
// we create those methods inline (inside generatetotal as paramater)
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subtotal for cart 2 is {Math.Round(subTotal,2)}"),
(products, subTotal) =>
{
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 Alert: {message}"));
Console.WriteLine($"The total for cart 2 is : {total} ");
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
private void TotalTextBoxBtn_Click(object sender, EventArgs e)
{
//I don't know how to do this without the total variable; :(
//TotalTextBox.Text = cart.GenerateTotal(
// (preTotal) => PreTotalTextBox.Text = $"{preTotal:C2}",
// (items, preTotal) => preTotal - (items.Count * 2),
// (x) => { }).ToString();
decimal total = cart.GenerateTotal(
(preTotal) => PreTotalTextBox.Text = $"{preTotal:C2}",
(items, preTotal) => preTotal - (items.Count * 2),
(x) => { });
TotalTextBox.Text = $"{total:C2}";
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(Alert, CalculateDiscountedSubTotal, Alert):C2}");
Console.WriteLine("******************");
var total = cart.GenerateTotal(subTotal => Console.WriteLine($"The subtotal for cart 2 is {subTotal:C2}"),
(items, subTotal) => items.Count > 3 ? subTotal * 0.50M : subTotal,
message => Console.WriteLine(message)
);
Console.WriteLine($"The total for the cart2 is {total:C2}");
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.WriteLine();
Console.ReadKey();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
cart.GenerateTotal(getSubtotal, GetTotalBeforeDiscount, computeDiscountedTotal, printTotalAfterDiscount);
Console.WriteLine("Press any key to exit...");
Console.ReadLine();
}
private void btnCalculate_Click(object sender, EventArgs e)
{
decimal total = cart.GenerateTotal((subtotal) => txtSubtotal.Text += $"{subtotal:C2}. ",
(productlist, subtotal) => subtotal - productlist.Count(),
(msg) => { }
);
txtTotalDisc.Text = $"after discount: ${total:C2}";
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser):C2}");
Console.WriteLine();
Console.Write("Please press any key to exit the application");
Console.ReadKey();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
Console.WriteLine($"The total for the cart is {cart.GenerateTotal():C2}");
Console.WriteLine();
Console.Write("Please press any key to exit the application...");
Console.ReadKey();
}
static void Main(string[] args)
{
PopulateCartWithDemoData();
/*
* c2 indicates that I want this to be a money which in since I'm in the US is going to be a dollar sign and it's going to have two places after the
* decimal that's the two and so they'll show it formatted as money.
*/
Console.WriteLine($"The total for the cart is {cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, AlertUser):C2}");
Console.WriteLine();
/*
* How to create GenerateTotal method inline?
* We can do so with the use of Anonymous method. Since it is anonymous we don't need to give it a name for our method because the delegate doesn't care
* all the delegate cares about is output type and input types.
*/
decimal total = cart.GenerateTotal((subTotal) => Console.WriteLine($"The subtotal for cart 2 is {subTotal:C2}"),
(products, subTotal) =>
{
if (products.Count > 3)
{
return(subTotal * 0.5M);
}
else
{
return(subTotal);
}
},
(message) => Console.WriteLine($"Cart 2 Alert: { message }"));
Console.WriteLine($"The total for Cart 2 is {total:C2}");
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Please press any key to exit the application");
Console.ReadKey();
}
private void MessageBoxDemo_Click(object sender, EventArgs e)
{
decimal total = cart.GenerateTotal(SubTotalAlert, CalculateLeveledDiscount, PrintOutDiscountAlert);
MessageBox.Show($"The total is {total:C2}");
}
private void messageBoxDemoButton_Click(object sender, EventArgs e)
{
decimal total = cart.GenerateTotal(SubTotalAlert, CalculetedLevelDiscount, PrintOutDiscountAlert);
MessageBox.Show($"The total is {total}");
}