Question

1. Create a new “Area” project.
   1. Create a new Visual Studio Project and call it “Area”.
   2. This project will be used to calculate the area of certain figures, like circles, squares and rectangles.
   3. So add a title to the Form. The Form Title should say “Area”. Also add 3 labels, 3 Buttons, 3 Textboxes and 3 RadioButtons. The 3 Buttons should be near the bottom of the Form and say “Calc Area”, “Clear” and “Exit”. Make sure to give all your components names that make sense, like we did in the “GoTeam” project. The Labels and Textboxes should be near the top towards the right side. The labels should say “Radius”, “Width” and “Area” and the 3 Textboxes should be empty. And the 3 RadioButtons should be in the middle near the left side. They should read “Circle”, “Square” and “Rectangle”.
   4. Add all these components and run this project. Use the Properties window to change any colors or Fonts that you would like.

Assign 2: Add to the “Area” project from Lab #1.  

1. When the user selects the “Circle” radio button….make sure the top Label says “Radius:” and only one textbox is visible.
2. Then when the user clicks on the “Calculate” button…..calculate the area of a circle and display it in the “Area” textbox.   
3. When the user selects the “Square” radio button…. make sure the top Label says “Side:” and only one textbox is visible.
4. Then when the user clicks on the “Calculate” button…..calculate the area of a square and display it in the “Area” textbox.
5. When the user selects the “Rectangle” radio button…. make sure the top Label says “Height:” and the bottom Label say “Width:”. and only one textbox is visible.
6. Then when the user clicks on the “Calculate” button…..calculate the area of a rectangle and display it in the “Area” textbox.
7. Add an “Exit” button to this project. Make the exit button work.

Add a “Clear” button to this project. Also make the Clear button work, clear should clear all textbaoxes

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 2017 with name "Area".This application contains a form with name "Form1.cs".Below are the files associated with form1.

1.Form1.cs[Design]

2.Form1.Designer.cs

namespace Area
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;

/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows Form Designer generated code

/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.lblRadius = new System.Windows.Forms.Label();
this.btnCalcArea = new System.Windows.Forms.Button();
this.rbtCircle = new System.Windows.Forms.RadioButton();
this.btnClear = new System.Windows.Forms.Button();
this.btnExit = new System.Windows.Forms.Button();
this.txtRadius = new System.Windows.Forms.TextBox();
this.txtWidth = new System.Windows.Forms.TextBox();
this.lblWidth = new System.Windows.Forms.Label();
this.txtArea = new System.Windows.Forms.TextBox();
this.lblArea = new System.Windows.Forms.Label();
this.rbtSquare = new System.Windows.Forms.RadioButton();
this.rbtRectangle = new System.Windows.Forms.RadioButton();
this.SuspendLayout();
//
// lblRadius
//
this.lblRadius.AutoSize = true;
this.lblRadius.Location = new System.Drawing.Point(12, 18);
this.lblRadius.Name = "lblRadius";
this.lblRadius.Size = new System.Drawing.Size(40, 13);
this.lblRadius.TabIndex = 0;
this.lblRadius.Text = "Radius";
//
// btnCalcArea
//
this.btnCalcArea.Location = new System.Drawing.Point(27, 120);
this.btnCalcArea.Name = "btnCalcArea";
this.btnCalcArea.Size = new System.Drawing.Size(75, 23);
this.btnCalcArea.TabIndex = 1;
this.btnCalcArea.Text = "&Calc Area";
this.btnCalcArea.UseVisualStyleBackColor = true;
this.btnCalcArea.Click += new System.EventHandler(this.btnCalcArea_Click);
//
// rbtCircle
//
this.rbtCircle.AutoSize = true;
this.rbtCircle.Location = new System.Drawing.Point(218, 18);
this.rbtCircle.Name = "rbtCircle";
this.rbtCircle.Size = new System.Drawing.Size(51, 17);
this.rbtCircle.TabIndex = 2;
this.rbtCircle.TabStop = true;
this.rbtCircle.Text = "Circle";
this.rbtCircle.UseVisualStyleBackColor = true;
this.rbtCircle.CheckedChanged += new System.EventHandler(this.rbtCircle_CheckedChanged);
//
// btnClear
//
this.btnClear.Location = new System.Drawing.Point(120, 120);
this.btnClear.Name = "btnClear";
this.btnClear.Size = new System.Drawing.Size(75, 23);
this.btnClear.TabIndex = 3;
this.btnClear.Text = "C&lear";
this.btnClear.UseVisualStyleBackColor = true;
this.btnClear.Click += new System.EventHandler(this.btnClear_Click);
//
// btnExit
//
this.btnExit.Location = new System.Drawing.Point(217, 120);
this.btnExit.Name = "btnExit";
this.btnExit.Size = new System.Drawing.Size(75, 23);
this.btnExit.TabIndex = 4;
this.btnExit.Text = "E&xit";
this.btnExit.UseVisualStyleBackColor = true;
this.btnExit.Click += new System.EventHandler(this.btnExit_Click);
//
// txtRadius
//
this.txtRadius.Location = new System.Drawing.Point(66, 15);
this.txtRadius.Name = "txtRadius";
this.txtRadius.Size = new System.Drawing.Size(100, 20);
this.txtRadius.TabIndex = 5;
//
// txtWidth
//
this.txtWidth.Location = new System.Drawing.Point(66, 47);
this.txtWidth.Name = "txtWidth";
this.txtWidth.Size = new System.Drawing.Size(100, 20);
this.txtWidth.TabIndex = 7;
//
// lblWidth
//
this.lblWidth.AutoSize = true;
this.lblWidth.Location = new System.Drawing.Point(12, 50);
this.lblWidth.Name = "lblWidth";
this.lblWidth.Size = new System.Drawing.Size(35, 13);
this.lblWidth.TabIndex = 6;
this.lblWidth.Text = "Width";
//
// txtArea
//
this.txtArea.Location = new System.Drawing.Point(66, 77);
this.txtArea.Name = "txtArea";
this.txtArea.Size = new System.Drawing.Size(100, 20);
this.txtArea.TabIndex = 9;
//
// lblArea
//
this.lblArea.AutoSize = true;
this.lblArea.Location = new System.Drawing.Point(12, 80);
this.lblArea.Name = "lblArea";
this.lblArea.Size = new System.Drawing.Size(29, 13);
this.lblArea.TabIndex = 8;
this.lblArea.Text = "Area";
//
// rbtSquare
//
this.rbtSquare.AutoSize = true;
this.rbtSquare.Location = new System.Drawing.Point(218, 50);
this.rbtSquare.Name = "rbtSquare";
this.rbtSquare.Size = new System.Drawing.Size(59, 17);
this.rbtSquare.TabIndex = 10;
this.rbtSquare.TabStop = true;
this.rbtSquare.Text = "Square";
this.rbtSquare.UseVisualStyleBackColor = true;
this.rbtSquare.CheckedChanged += new System.EventHandler(this.rbtSquare_CheckedChanged);
//
// rbtRectangle
//
this.rbtRectangle.AutoSize = true;
this.rbtRectangle.Location = new System.Drawing.Point(218, 80);
this.rbtRectangle.Name = "rbtRectangle";
this.rbtRectangle.Size = new System.Drawing.Size(74, 17);
this.rbtRectangle.TabIndex = 11;
this.rbtRectangle.TabStop = true;
this.rbtRectangle.Text = "Rectangle";
this.rbtRectangle.UseVisualStyleBackColor = true;
this.rbtRectangle.CheckedChanged += new System.EventHandler(this.rbtRectangle_CheckedChanged);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(312, 171);
this.Controls.Add(this.rbtRectangle);
this.Controls.Add(this.rbtSquare);
this.Controls.Add(this.txtArea);
this.Controls.Add(this.lblArea);
this.Controls.Add(this.txtWidth);
this.Controls.Add(this.lblWidth);
this.Controls.Add(this.txtRadius);
this.Controls.Add(this.btnExit);
this.Controls.Add(this.btnClear);
this.Controls.Add(this.rbtCircle);
this.Controls.Add(this.btnCalcArea);
this.Controls.Add(this.lblRadius);
this.Name = "Form1";
this.Text = "Area";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Label lblRadius;
private System.Windows.Forms.Button btnCalcArea;
private System.Windows.Forms.RadioButton rbtCircle;
private System.Windows.Forms.Button btnClear;
private System.Windows.Forms.Button btnExit;
private System.Windows.Forms.TextBox txtRadius;
private System.Windows.Forms.TextBox txtWidth;
private System.Windows.Forms.Label lblWidth;
private System.Windows.Forms.TextBox txtArea;
private System.Windows.Forms.Label lblArea;
private System.Windows.Forms.RadioButton rbtSquare;
private System.Windows.Forms.RadioButton rbtRectangle;
}
}

3.Form1.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 Area
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//Form load event
private void Form1_Load(object sender, EventArgs e)
{
//hide all labels and textboxes
lblRadius.Visible = false;
lblWidth.Visible = false;
lblArea.Visible = false;
txtArea.Visible = false;
txtRadius.Visible = false;
txtWidth.Visible = false;

}
//when circle radio button is selected
private void rbtCircle_CheckedChanged(object sender, EventArgs e)
{
//make label and textbox visible
lblRadius.Visible = true;
txtRadius.Visible = true;
txtWidth.Visible = false;
lblWidth.Visible = false;
lblArea.Visible = false;
txtArea.Visible = false;
}
//when square radio button is selected
private void rbtSquare_CheckedChanged(object sender, EventArgs e)
{
//make label and textbox visible
lblRadius.Visible = true;
lblRadius.Text = "Side";
txtRadius.Visible = true;
txtWidth.Visible = false;
lblWidth.Visible = false;

}
//when rectangle radio button is selected
private void rbtRectangle_CheckedChanged(object sender, EventArgs e)
{
//make label and textbox visible
lblRadius.Visible = true;
lblRadius.Text = "Height";
txtRadius.Visible = true;
txtWidth.Visible = true;
lblWidth.Visible = true;
lblArea.Visible = false;
txtArea.Visible = false;
}
//calculate button click
private void btnCalcArea_Click(object sender, EventArgs e)
{
//checking which radio button is selected
if(rbtCircle.Checked==true)
{
//if circle radio button is selected then
//taking radius enered by user
double radius = double.Parse(txtRadius.Text);
//calculate and display area of circle
txtArea.Text = (Math.PI * radius * radius).ToString("0.00");
txtArea.Visible = true;
lblArea.Visible = true;
}
//checking which radio is selected
else if (rbtSquare.Checked == true)
{
//if Square radio button is selected then
//taking side enered by user
double side = double.Parse(txtRadius.Text);
//calculate and display area of square
txtArea.Text = (side*side).ToString("0.00");
txtArea.Visible = true;
lblArea.Visible = true;
}
//checking which radio is selected
else if (rbtRectangle.Checked == true)
{
//if rectangle radio button is selected then
//taking height and width enered by user
double height = double.Parse(txtRadius.Text);
//taking width entered by user
double width = double.Parse(txtWidth.Text);
//calculate and display area of rectangle
txtArea.Text = (height * width).ToString("0.00");
txtArea.Visible = true;
lblArea.Visible = true;
}
}
//Clear button click
private void btnClear_Click(object sender, EventArgs e)
{
//when clear button clicked ,clear all textboxes
txtArea.Text = "";
txtRadius.Text = "";
txtWidth.Text = "";
}
//Exit button click
private void btnExit_Click(object sender, EventArgs e)
{
//When exit button clicked , close the form
this.Close();
}
}
}

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

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

Screen 1 :

Screen 2 :Screen showing area of circle

Screen 3 :Screen showing area of square

Screen 4 :Screen showing area of rectangle

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