Question

Programming question. Using Visual Studio 2019 C#. Windows Forms Application.

Write the code to display the message “Entry error” in the msgLabel when the value in the Integer units variable is less than or equal to 0. Otherwise, calculate the total owed as follows: If the value stored in the units variable is less than 20, multiply the value by $10; otherwise, multiply it by $5. Store the total owed in the total variable.

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a new Windows Forms Application in C# is created using Visual Studio with name "DemoWindowsForms".This application contains a form with name "demoForm.cs".Below are the files associated with form1.

1.demoForm.cs[Design]

Value for Total VariableX Enter value for Units Calculate

2.demoForm.Designer.cs

3.demoForm.cs

//namespace
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;
//application namespace
namespace DemoWindowsForms
{
public partial class demoForm : Form
{
public demoForm()
{
InitializeComponent();
}
//Calculate button click
private void btnCalculate_Click(object sender, EventArgs e)
{
//taking value of units
int units = int.Parse(txtUnits.Text);
//declaring variale total
int total = 0;
//checking value of units
if(units>0)
{
//checking value of units variable
if(units < 20)
{
//calculate total
total = units * 10;//multiply by 10
}
else
{
//calculate total
total = units * 5;//multiply by 5
}
//display total
msgLabel.Text = "Total : " + total;
}
else
{
//display error on the lable
msgLabel.Text = "Entry error";
}

}
}
}

======================================================

Output : Run application using F5 and will get the screen as shown below

Screen 1 :

Value for Total VariableX Enter value for Units Calculate

Screen 2 :Screen when units are <=0

Value for Total Variable-X Enter value for Units Calculate Entry error

Screen 3 :Screen when units are < 20

Value for Total Variable - Enter value for Units 15 Calculate Total 150

Screen 4 :Screen when units are > 20

Value for Total Variable - Enter value for Units Calculate Total 110

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.