Question

Visual Studio Code C#

Well Document everyline saying what the code does.

Include designer code and .cscode

Extra 6-1 Create a simple calculator In this exercise, you'l1 create a form that accepts two operands and an operator from the user and then performs the requested operation. Simple Calculator Operand 1: 86 Operator Operand 2 11.11 Resut 7.7408 1. Start a new project named SimpleCalculator in the Extra Exercises Chapter 06SimpleCalculator directory 2. Add labels, text boxes, and buttons to the default form and set the properties of the form and its controls so they appear as shown above. When the user presses the Enter key, the Click event of the Calculate button should fire. When the user presses the Esc key, the Click event of the Exit button should fire 3. Code a private method named Calculate that performs the requested operatiorn and returns a decimal value. This method should accept the following arguments Description Argument decimal operandi string operatorl decimal operand2 The value entered for the first operand. One of these four operators: +, -, *, or / The value entered for the second operand. 4. Create an event handler for the Click event of the Calculate button. This event handler should get the two numbers and operand the user enters, call the Calculate method to get the result of the calculation, display the result rounded to four decimal places, and move the focus to the Operand 1 text box. Create an event handler for the Click event of the Exit button that closes the form Create an event handler that clears the Result text box if the user changes the text in any of the other text boxes Test the application to be sure it works correctly 5. 6. 7.

Answer 1

Form Design

Form1.Designer.cs

namespace SimpleCalculator
{
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.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.textBox3 = new System.Windows.Forms.TextBox();
this.textBox4 = new System.Windows.Forms.TextBox();
this.btn_Calculate = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label1.Location = new System.Drawing.Point(23, 32);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(82, 16);
this.label1.TabIndex = 0;
this.label1.Text = "Operand 1:";
//
// label2
//
this.label2.AutoSize = true;
this.label2.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label2.Location = new System.Drawing.Point(23, 74);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 16);
this.label2.TabIndex = 1;
this.label2.Text = "Operator:";
//
// label3
//
this.label3.AutoSize = true;
this.label3.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label3.Location = new System.Drawing.Point(23, 119);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(82, 16);
this.label3.TabIndex = 2;
this.label3.Text = "Operand 2:";
//
// label4
//
this.label4.AutoSize = true;
this.label4.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label4.Location = new System.Drawing.Point(23, 167);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(54, 16);
this.label4.TabIndex = 3;
this.label4.Text = "Result:";
//
// textBox1
//
this.textBox1.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textBox1.Location = new System.Drawing.Point(111, 29);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(100, 23);
this.textBox1.TabIndex = 4;
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);
//
// textBox2
//
this.textBox2.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textBox2.Location = new System.Drawing.Point(111, 71);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(100, 23);
this.textBox2.TabIndex = 5;
this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
this.textBox2.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox2_KeyDown);
//
// textBox3
//
this.textBox3.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textBox3.Location = new System.Drawing.Point(111, 116);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(100, 23);
this.textBox3.TabIndex = 6;
this.textBox3.TextChanged += new System.EventHandler(this.textBox3_TextChanged);
this.textBox3.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox3_KeyDown);
//
// textBox4
//
this.textBox4.Enabled = false;
this.textBox4.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.textBox4.Location = new System.Drawing.Point(111, 164);
this.textBox4.Name = "textBox4";
this.textBox4.Size = new System.Drawing.Size(100, 23);
this.textBox4.TabIndex = 7;
//
// btn_Calculate
//
this.btn_Calculate.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.btn_Calculate.Location = new System.Drawing.Point(26, 211);
this.btn_Calculate.Name = "btn_Calculate";
this.btn_Calculate.Size = new System.Drawing.Size(95, 26);
this.btn_Calculate.TabIndex = 8;
this.btn_Calculate.Text = "Calculate";
this.btn_Calculate.UseVisualStyleBackColor = true;
this.btn_Calculate.Click += new System.EventHandler(this.btn_Calculate_Click);
//
// button2
//
this.button2.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.button2.Location = new System.Drawing.Point(136, 211);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 26);
this.button2.TabIndex = 9;
this.button2.Text = "Exit";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(237, 258);
this.Controls.Add(this.button2);
this.Controls.Add(this.btn_Calculate);
this.Controls.Add(this.textBox4);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label4);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "Simple Calculator";
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.TextBox textBox4;
private System.Windows.Forms.Button btn_Calculate;
private System.Windows.Forms.Button button2;
}
}

***************************************************************************

Form1.cs

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 SimpleCalculator
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
  
// method for calculation
private double Calculate(double operand1,double operand2,char operator1)
{
double ans = 0.0;
if (operator1.Equals('+')) // if operator is + then do addition
ans = operand1 + operand2;
else
if (operator1.Equals('-'))   // if operator is - then do subtraction
ans = operand1 - operand2;
else
if (operator1.Equals('*'))   // if operator is * then do multplication
ans = operand1 * operand2;
else
if (operator1.Equals('/'))   // if operator is / then do division
ans = operand1 / operand2;
return Math.Round(ans, 4); // Rounding number to 4th decimal position
}

// when calculate button is clicked
private void btn_Calculate_Click(object sender, EventArgs e)
{
try
{

// getting two operands and one operator from form
double operand1 = Convert.ToDouble(textBox1.Text);
double operand2 = Convert.ToDouble(textBox3.Text);
char operator1 = Convert.ToChar(textBox2.Text);

// call Calculate method to get output
double answer=Calculate(operand1,operand2,operator1);
textBox4.Text = answer + ""; // display output in text box
}
catch (Exception)
{
MessageBox.Show("Invalid input");
}
}

private void button2_Click(object sender, EventArgs e)
{
// when user clicks on exit button or press esc
// then from will be closed
this.Close();
}

private void textBox1_TextChanged(object sender, EventArgs e)
{

// if text box1 text changed then clearing result text box
textBox4.Clear();
}

private void textBox2_TextChanged(object sender, EventArgs e)
{
textBox4.Clear();
}

private void textBox3_TextChanged(object sender, EventArgs e)
{
textBox4.Clear();
}
// following three methods for calculate button on enter key
private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
this.AcceptButton = btn_Calculate;
}

private void textBox2_KeyDown(object sender, KeyEventArgs e)
{
this.AcceptButton = btn_Calculate;
}

private void textBox3_KeyDown(object sender, KeyEventArgs e)
{
this.AcceptButton = btn_Calculate;
}
// for escape button
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (keyData == (Keys.Escape))
{
Close();
return true;
}
return base.ProcessCmdKey(ref msg, keyData);
}
}
}

Output