Question

Must be in C#: 7. E-MAIL ADDRESS BOOK Create a Windows Forms Application with a class named PersonEntry. The PersonEntry class should have properties for a person’s name, e-mail address, and phone number. Also, create a text file that contains the names, e-mail addresses, and phone numbers for at least five people. When the application starts, it should read the data from the file and create a PersonEntry object for each person’s data. The PersonEntry objects should be added to a List, and each person’s name should be displayed in a list box on the application’s main form. When the user selects a name from the list box, a second form should appear displaying that person’s name, e-mail address, and phone number. There are additional requirements; please see Main Differences between the Textbook Instructions and This Document above.

Answer 1

SourceCode:

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.IO;

namespace PhoneBook

{

    public partial class Form1 : Form

    {

        //create a List object of PersonEntry type

        List<PersonEntry> entries = new List<PersonEntry>();

        public Form1()

        {

            InitializeComponent();

        }

        //create a class called PersonEntry

        class PersonEntry

        {

            //declare the required class variables

            public string name;

            public string email;

            public string phone_num;

            //define the constructor of the class

            public PersonEntry()

            {

                name = "";

                email = "";

                phone_num = "";

            }

            //setter methods

            public void setName(string pname)

            {

                name = pname;

            }

            public void setEmail(string pemail)

            {

                email = pemail;

            }

            public void setPhone(string phone)

            {

                phone_num = phone;

            }

            //getter methods

            public string getName()

            {

                return name;

            }

            public string getEmail()

            {

                return email;

            }

            public string getPhone()

            {

                return phone_num;

            }

        }

        //when the create list button is click the following

        //is done

        private void listbtn_Click(object sender, EventArgs e)

        {

            //declare a string variable and a delimiter

            string line;

            char delimiter = '\t';

            //create an object to StreamReader

            StreamReader readfile = new StreamReader(@"C:\Users\soujanya.m\Documents\Visual Studio 2010\Projects\PhoneBook\PhoneBook\PhoneBook.txt");

            //loop until end of stream

            while (!readfile.EndOfStream)

            {

                //read each line from the file

                line = readfile.ReadLine();

                //split the line at give delimiter

                string[] parse = line.Split(delimiter);

                //create an object to the PersonEntry class

                PersonEntry perEntry = new PersonEntry();

                //set the values

                perEntry.setName(parse[0]);

                perEntry.setEmail(parse[1]);

                perEntry.setPhone(parse[2]);

                //add the object to the list called entries

                entries.Add(perEntry);

                //add the names to the list box

                listBox1.Items.Add(perEntry.getName());

            }

        }

        //logic to close the form on clicking the exit button

        private void exitbtn_Click(object sender, EventArgs e)

        {

            Close();

        }

        //when the items are selected, a new form will be opened

        //and displays the respective details of the name selected

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            Form newform = new Form();

            int index = listBox1.SelectedIndex;

            newform.Text = entries[index].getName() + " details: ";

            string str = "";

            Label lb = new Label();

            //add the string values to display

            str += "Name: " + entries[index].getName() + "\n";

            str += "Email address: " + entries[index].getEmail() + "\n";

            str += "Phone number: " + entries[index].getPhone() + "\n";

            //set the size and font of the label

            lb.Font = new Font("Serif", 12, FontStyle.Bold);

            lb.Size = new System.Drawing.Size(250, 250);

            //add the string to the label

            lb.Text = str;

            lb.Visible = true;

            lb.Location = new System.Drawing.Point(10, 10);

            //add the label to the newform

            newform.Controls.Add(lb);

            //set the size of the new form

            newform.Size = new System.Drawing.Size(300, 200);

            newform.ShowDialog();

        }

    }

}

Sample Input and Output: