Exam preparation C# Sorting

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Collections;

using System.IO;

 

namespace ConsoleApplication5

{

//Sorting programming

//I create 3 classes Product, Sorting and Program.

//Product class has ID, name, price, taxrate, tax and total price.

//Soting class has compare method.

//Program class has user to input product, create their objects and sort by total price.

//Also, this result stores txt file.

class
Program

{

static
void Main(string[] args)

{

//Create ArrayList

ArrayList al = new
ArrayList();

 

//Input TaxRate

Console.WriteLine("Please input TaxRate.");

//Read TaxRate

string input = Console.ReadLine();

//Convert double

double taxrate = double.Parse(input);

 

//Set TaxRate value

Product.SetTaxRate(taxrate);

 

//Declare variable for do while loop

int i = 0;

 

//Start do while loop

do

{

//Input ID

Console.WriteLine("Please input product ID.");

//Read ID

string input1 = Console.ReadLine();

//Convert integer

int id = int.Parse(input1);

 

//Input Name

Console.WriteLine("Please input product Name.");

//Read Name

string name = Console.ReadLine();

 

//Input price

Console.WriteLine("Please input product Price.");

//Read price

string input2 = Console.ReadLine();

//Convert double

double price = double.Parse(input2);

 

//Create object

Product pr= new Product(id, name, price);

al.Add(pr);

 

//Ask to input another product

Console.WriteLine("Do you want to input another prodyct? yes-1 no-0");

//Read answer

string input3 = Console.ReadLine();

//Convert integer

i = int.Parse(input3);

 

//End of do while loop

}

while (i == 1);

 

//Display current Array order before sorting

foreach (Product pr in al)

{

//Set tax value

pr.SetTax();

//Set total price value

pr.SetTotalPrice();

//Display current value

Console.WriteLine("ID: "+pr.GetID() + "\nName: " + pr.GetName() + "\nPrice: " + pr.GetPrice() + "\nTax: " + pr.GetTax() + "\nTotalPrice: " + pr.GetTotalPrice()+"\n");

}

 

//Excute sorting

al.Sort(new Sorting());

 

try

{

//Initialize filestreem

FileStream fs = new
FileStream

(

//Set file access

@"E:\VirtualExpander_J\C#\Fileaccess\exampractice.txt",

FileMode.Create,

FileAccess.ReadWrite,

FileShare.Read

);

 

//Initialize stream writer

StreamWriter sw = new
StreamWriter(fs);

 

//Display current Array order after sorting

foreach (Product pr1 in al)

{

 

//Display current value

Console.WriteLine("ID: " + pr1.GetID() + "\nName: " + pr1.GetName() + "\nPrice: " + pr1.GetPrice() + "\nTax: " + pr1.GetTax() + "\nTotalPrice: " + pr1.GetTotalPrice() + "\n");

 

//Write current value

sw.WriteLine("ID: " + pr1.GetID() + "Name: " + pr1.GetName() + "Price: " + pr1.GetPrice() + "Tax: " + pr1.GetTax() + "TotalPrice: " + pr1.GetTotalPrice() + "\n");

}

 

//Close stream writer

sw.Close();

//Close file streem

fs.Close();

}

catch

{

Console.WriteLine("Try block error");

}

}

}

//Product template

class
Product

{

//Declare variables

int ID;

string Name;

double Price;

static
double TaxRate;

double Tax;

double TotalPrice;

 

//Create method return ID

public
int GetID()

{

return ID;

}

 

//Create method return Name

public
string GetName()

{

return Name;

}

 

//Create method return Price

public
double GetPrice()

{

return Price;

}

 

//Create static method set TaxRate

public
static
void SetTaxRate(double d)

{

TaxRate = d;

}

 

//Create ststic method return TaxRate

public
static
double GetTaxRate()

{

return TaxRate;

}

 

//Create method calculate Tax

public
void SetTax()

{

Tax = Price * TaxRate;

}

 

//Create method return Tax

public
double GetTax()

{

return Tax;

}

 

//Create method calculate TotalPrice

public
void SetTotalPrice()

{

TotalPrice = Price + Tax;

}

 

//Create method return TotalPrice

public
double GetTotalPrice()

{

return TotalPrice;

}

 

//Constructor of Product class

public Product(int id, string name, double price)

{

ID = id;

Name = name;

Price = price;

}

//End of product class

}

//Sorting

class
Sorting : IComparer

{

//Compare method

public
int Compare(object a, object b)

{

//Declare return value

int value = 0;

 

//Cast object a and b

Product prod = (Product)a;

Product prod1 = (Product)b;

 

//Get TotalPrice value

double comprice = prod.GetTotalPrice();

double comprice1 = prod1.GetTotalPrice();

 

//Compare each case

if (comprice > comprice1)

{

value = 10;

}

 

if (comprice == comprice1)

{

value = 0;

}

 

if (comprice < comprice1)

{

value = -10;

}

 

//return result

return value;

}

}

}