This WPF program is lacking a IsRegisteredAlready method. The program needs the
ID: 3581680 • Letter: T
Question
This WPF program is lacking a IsRegisteredAlready method. The program needs the method to return an "sorry! User already registered in this course" and not include the chosen class.
namespace WPFRegisterStudent
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
Course choice;
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
Course course1 = new Course("IT 145");
Course course2 = new Course("IT 200");
Course course3 = new Course("IT 201");
Course course4 = new Course("IT 270");
Course course5 = new Course("IT 315");
Course course6 = new Course("IT 328");
Course course7 = new Course("IT 330");
this.comboBox.Items.Add(course1);
this.comboBox.Items.Add(course2);
this.comboBox.Items.Add(course3);
this.comboBox.Items.Add(course4);
this.comboBox.Items.Add(course5);
this.comboBox.Items.Add(course6);
this.comboBox.Items.Add(course7);
this.textBox.Text = "";
}
private void button_Click(object sender, RoutedEventArgs e)
{
choice = (Course)(this.comboBox.SelectedItem);
this.listBox.Items.Add(choice);
if (choice.IsRegisteredAlready() == true)
MessageBox.Show("sorry! User already registered in this course");
else if (this.textBox.Text == "9")
MessageBox.Show("sorry! User already registered in 3 courses");
else
{
choice.SetToRegistered();
if (this.textBox.Text == "")
this.textBox.Text = "3";
else if (this.textBox.Text == "3")
this.textBox.Text = "6";
else if (this.textBox.Text == "6")
this.textBox.Text = "9";
MessageBox.Show("Congratulations!User you have registered for" + Environment.NewLine +choice.ToString());
}
}
}
}
namespace WPFRegisterStudent
{
class Course
{
private string name = "";
private bool isRegisteredAlready = false;
public Course(string name)
{
this.name = name;
}
public void setName(string name)
{
this.name = name;
}
public string getName()
{
return name;
}
public bool IsRegisteredAlready()
{
return isRegisteredAlready;
}
public void SetToRegistered()
{
isRegisteredAlready = true;
}
public override string ToString()
{
return getName();
}
}
}
Explanation / Answer
MainWindow.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WPFRegisterStudent
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
Course choice;
int TotalCreditHours = 0; //Used to increment how many credit hours have been registered
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
Course course1 = new Course("IT 145");
Course course2 = new Course("IT 200");
Course course3 = new Course("IT 201");
Course course4 = new Course("IT 270");
Course course5 = new Course("IT 315");
Course course6 = new Course("IT 328");
Course course7 = new Course("IT 330");
this.comboBox.Items.Add(course1);
this.comboBox.Items.Add(course2);
this.comboBox.Items.Add(course3);
this.comboBox.Items.Add(course4);
this.comboBox.Items.Add(course5);
this.comboBox.Items.Add(course6);
this.comboBox.Items.Add(course7);
this.textBox.Text = "";
}
private void button_Click(object sender, RoutedEventArgs e)
{
choice = (Course)(this.comboBox.SelectedItem);
string courseName = choice.ToString();
switch (validateUserSelection(choice))
{
case 0://Display error confirmation: Already registered
label3.Content = "You have already registered for this course " + courseName;
break;
case 1: //Display error confirmation: Too many credit hours
label3.Content = "You cannot register for more than 9 credit hours.";
break;
case 2:
choice.SetToRegistered(); //Sets registration bool to true (See ValidateUserSelection function)
listBox.Items.Add(choice); // Display a registration confirmation message
label3.Content = "Registration confirmed for course " + courseName;
TotalCreditHours += 3; // update the total credit hours textbox if registration is confirmed for a selected course
textBox.Text = TotalCreditHours.ToString();
break;
}
}
private int validateUserSelection(Course selectedCourse) //Create code to validate user selection (the choice object)
{
if (selectedCourse.IsRegisteredAlready()) //Checks to see if course is already registered
{
return 0;
}
else if (TotalCreditHours > 8) //Checks to see if exceeded 8/ reached 9 credit hours
{
return 1;
}
return 2;
}
}
}
Course.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace WPFRegisterStudent
{
class Course
{
private string name = "";
private bool isRegisteredAlready = false;
public Course(string name)
{
this.name = name;
}
public void setName(string name)
{
this.name = name;
}
public string getName()
{
return name;
}
public bool IsRegisteredAlready()
{
return isRegisteredAlready;
}
public void SetToRegistered()
{
isRegisteredAlready = true;
}
public override string ToString()
{
return getName();
}
}
}
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