A C# folder exercice ,im beginer explain me pls

Okay let’s tackle this challenge.

The first step is to translate the complexity of the written requirements into plain simple terms where you and I can understand it. I apologize if I offend anyone but the requirements are verbose and inarticulate.

Translation:

Create an application that:

Calculates the total number of phones sold during the year
Calculate the total of the phone model from which no copies have sold.

Requirements:

We must use a two-dimensional array. The array must have 12 columns and any number of rows.
We must include a function named NT that returns an integer. Its job is to calculate the number of units sold over a 12-month period for any given model mobile phone. That’s the return value.
The application must open a file. The file will provide the data to populate the two-dimensional array.
The requirements state the following: “Count N lines containing 12 integers separated by space”. That means the file we’ll open is space delimited text file.
The application must produce a new output file entailing: Total phones sold, and indication of what did and did not sale. The format may look something like this:

Total Phones Sold:

Are Not

… and so on.

This format looks really weird but hey, it’s the requirements. Let’s re-read the requirements:

“The second line contains whole numbers separated by space -…” This defines the line in an abstract manner.

“… the index of the models of mobile phones that have not been sold If there are no such models, then the second line contains the expression: Are Not.” This defines the actual implementation of what a line will look like.

The index of mobile phones that have not been sold would have zero in all 12 columns in the data file.

If there are no such models then the second line contains the expression: Are Not, would be those that had sold, just the opposite or, those phones that have unit sold data in all 12 columns.

Translation: The first line is total units sold. The second line and those lines that follow is the summary. If an index didn’t have units sold then list its index in a whole number else replace the whole number with “Are Not”. It means the second line can either be a whole number representing an index of mobile phones not sold or it can be the expression “Are Not” representing phones that did sell.

Looking at the above hypothetical output we can see that index 3 and 5 did not sale any models. Indexes 0, 1, 2 and 4 did have units sold.

Although we will have calculated the total of the phone model from which no copies have sold, there is no requirement telling us to show it. We only have to show the index despite having totaled it. How are hard it is to add a bunch of zeros? LOL!

Programmer’s Liberty:

Because the requirements don’t specify: The type of two-dimensional array, I get to determine the type. That’s the rules. It will be a class array.

Notes:

Most of the useful array functionality is available to one dimensional arrays, like resizing for example for dynamic array building. In most cases as developers we use C#’s collections like a DataTables, SqlReaders, List, an ArrayList or a Dictionary to handle dynamic data. If this project were an application a corporation requested a developer would likely be requesting data from database management system, like oracle or sql server as opposed to file read. Today’s project is purely academic and our two dimensional will be hardcoded to finite size from a file read.

Let’s get a closer look at our class array:

Our Space Delimited Data File

Application UI for Clarity

Output File:

Application Code: Main Form

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Sandbox2
{
// an enumeration of months. This will dictate to a cell which month (or columns in the array) it belongs to.
enum Month { January=1,
February =2,
March =3,
April =4,
May =5,
June =6,
July =7,
August =8,
September =9,
October =10,
November =11,
December =12 }
public partial class SalesDashboard : Form
{
// Support Variables
MobilePhoneSalesUnit[,] mpsuSales = null;
public SalesDashboard()
{
InitializeComponent();
}
private void SalesDashboard_Load(object sender, EventArgs e)
{
// build data columns
InitializeDataColumns();
}
private void InitializeDataColumns()
{
// per the requirements we have an explicit description of 12 columns.
// therefore we'll hardcode 12 columns
lvwData.Columns.Clear();
lvwData.Columns.Add("Jan", 50);
lvwData.Columns.Add("Feb", 50);
lvwData.Columns.Add("Mar", 50);
lvwData.Columns.Add("Apr", 50);
lvwData.Columns.Add("May", 50);
lvwData.Columns.Add("Jun", 50);
lvwData.Columns.Add("Jul", 50);
lvwData.Columns.Add("Aug", 50);
lvwData.Columns.Add("Sep", 50);
lvwData.Columns.Add("Oct", 50);
lvwData.Columns.Add("Nov", 50);
lvwData.Columns.Add("Dec", 50);
}
private void btnOpen_Click(object sender, EventArgs e)
{
// support variables
OpenFileDialog ofd = new OpenFileDialog();
mpsuSales = new MobilePhoneSalesUnit[6,12];
int rowCount = 0;
int colCount = 0;
int monthCount = 1;
int unitsSold = 0;
string filePath = string.Empty;
try
{
// configure OpenFileDialog to our preference
// Get right to the point. No where's waldo of files!
ofd.InitialDirectory = @"C:\Users\jaxpr\OneDrive\Documents";
ofd.Filter = "Text Files (*.txt)|*.txt|All files (*.*)|*.*";
ofd.Multiselect = false;
// present open file dialog wait for file selction and an OK
if(ofd.ShowDialog() == DialogResult.OK)
{
// get the file path
filePath = ofd.FileName;
// open a streamreader to the file
System.IO.StreamReader data = new System.IO.StreamReader(filePath);
// if we have a live object then proceed
if (data != null)
{
using (data)
{
// start with empty line type string
string line = string.Empty;
// loop through each line in the csv file
while ((line = data.ReadLine()) != null)
{
// take a line and parse it into a one dim array of elements
string[] elements = line.Split(' ');
// go through each element
foreach (string element in elements)
{
// the rest of the file
if (int.TryParse(element, out unitsSold) == true)
{
// reset monthCount on need basis
if(monthCount==13)
{
monthCount = 1;
}
// reset colCount on need basis
if(colCount==12)
{
colCount = 0;
}
// create a new MobilePhoneSalesUnit
MobilePhoneSalesUnit singleMonthUnit = new MobilePhoneSalesUnit();
// Populate MobilePhoneSalesUnit with data
singleMonthUnit.SetValues(string.Empty, (Month)monthCount, unitsSold);
// Add the MobilePhoneSalesUnit to the array
mpsuSales[rowCount, colCount] = singleMonthUnit;
// advance colCount, monthCounth
colCount++;
monthCount++;
}
else
{
// thorw an exception and allow the catch to handle it without crippling our app
throw new Exception("Ah, Nuts! Something's wrong!");
}
}
// advance rowCount
rowCount++;
}
}
}
// show visitors to c-sharpcorner what the array looks like
CreateVisualOfArray();
// create the output file
CreateOutputFile(filePath);
}
}
catch (Exception ex)
{
// Let me know if something goes wrong
string message = ex.Message;
MessageBox.Show(message, "Mobile Phone Units Sold", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void CreateVisualOfArray()
{
// Method: CreateVisualOfArray
// Return: None
// Populates a listview control lvwData with the array data
// Support Variables
ListViewItem i = null;
MobilePhoneSalesUnit unit = null;
// initializie listview content
lvwData.Items.Clear();
// for each row create a listview item
for (int rowCount = 0; rowCount < 6; rowCount++)
{
i = new ListViewItem();
// for each column create a listview subitem
for (int colCount=0; colCount<12; colCount++)
{
unit = mpsuSales[rowCount, colCount];
if (colCount == 0)
{
i.Text = unit.UnitsSold.ToString();
}
else
{
ListViewItem.ListViewSubItem s = new ListViewItem.ListViewSubItem();
s.Text = unit.UnitsSold.ToString();
i.SubItems.Add(s);
}
}
// add populated listview item to the listview control for display
lvwData.Items.Add(i);
}
}
private void CreateOutputFile(string filePath)
{
// Method: CreateOutputFile
// Return: None
// Creates a text output file with report or summary like content
// Support Variables
try
{
filePath = System.IO.Path.GetDirectoryName(filePath);
filePath = string.Concat(filePath, @"\SalesSummary.txt");
System.IO.StreamWriter swReportWriter = new System.IO.StreamWriter(filePath);
using (swReportWriter)
{
// Write the first line: Total Sold
int totalUnitsSold = GetTotalUnitsSold();
string totalPhonesSold = string.Concat("Total Mobile Phones Sold: ", totalUnitsSold);
swReportWriter.WriteLine(totalPhonesSold);
// each row is a mobile phone model
for (int rowCount=0; rowCount<6; rowCount++)
{
// per the requirements use funtion NT to get
// mobile phone model units sold
// the second line and those that follow
int totalUnitsPerModelSold = NT(rowCount);
string summary = string.Empty;
// Calculate the total of the phone model from which no copies have sold.
if(totalUnitsPerModelSold == 0)
{
//
summary = string.Concat("Index: ", rowCount.ToString());
}
// then second line contains expression: Are Not
else
{
summary = "Are Not";
}
swReportWriter.WriteLine(summary);
}
}
MessageBox.Show("Output File is Ready", "Total Mobile Phones Sold", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch(Exception ex)
{
// Let me know if something goes wrong
string message = ex.Message;
MessageBox.Show(message, "Mobile Phone Units Sold", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private int GetTotalUnitsSold()
{
// Method: GetTotalUnitsSold
// Return: int
// Sums all the mobile phone models monthly units sold
// default result is 0
int result = 0;
// each row is a mobile phone model
for (int rowCount = 0; rowCount < 6; rowCount++)
{
// per the requirements use funtion NT to get
// mobile phone model units sold
int totalUnitsPerModelSold = NT(rowCount);
// if nothing was sold then write a line
result = result + totalUnitsPerModelSold;
}
return result;
}
private int NT(int MobilePhoneModel)
{
// Method: NT
// Return: int
// requirement: a functioned named NT, takes a parameter, performs a total and returns total value
// default return value
int result = 0;
// each column is a month
for(int colCount=0; colCount<12; colCount++)
{
// the month's data is in the object located in the array
// Remember, a row is a mobile phone model
// the object mpsu is the data about mobile phone model divided into 12 elements
// each element is a sales record in a month
MobilePhoneSalesUnit mpsu = mpsuSales[MobilePhoneModel, colCount];
result = result + mpsu.UnitsSold;
}
return result;
}
}
}

Class: Mobile Phone Sales Unit

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Sandbox2
{
class MobilePhoneSalesUnit
{
// encapsulated data
string m_model = string.Empty;
Month m_month = Month.January;
int m_unitsSold = 0;
// class constructor
public MobilePhoneSalesUnit()
{
// nothing here for now
}
// class read only properties
public string Model
{
get { return m_model; }
}
public Month Month
{
get { return m_month; }
}
public int UnitsSold
{
get { return m_unitsSold; }
}
public void SetValues(string model, Month month, int unitsSold)
{
m_model = model;
m_month = month;
m_unitsSold = unitsSold;
}
}

Have a great day!