I made a basic calculator using visual studio, DotNet & C#

Simple calculator using DotNet Technology and C#

I made this simple mini-calculator project for my BCA 5th semester assignment. I have provided the source code.

An icon used: Icon Archive

Functions of this projects

• Basic calculations like addition, subtraction, multiplication, and division.

• GUI is made from windows form (DotNet framework).

Source Code

---

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 myCalculator

{

    public partial class Form1 : Form

    {

        Double resultValue = 0;

        string operationPerformd = "";

        bool isoperationIsPerformed = false;

        public Form1()

        {

            InitializeComponent();

        }

        private void button_click(object sender, EventArgs e)

        {

            if ((textBox_Result.Text == "0") || (isoperationIsPerformed))

            

                textBox_Result.Clear();

            

            isoperationIsPerformed = false;

            Button button = (Button)sender; //capture the event of all buttons

            if (button.Text == ".")

            {

                if (!textBox_Result.Text.Contains("."))

                    textBox_Result.Text = textBox_Result.Text + button.Text;

            }

            else

            {

                textBox_Result.Text = textBox_Result.Text + button.Text;

            }

            

        }

        private void operator_click(object sender, EventArgs e)

        {

            Button button = (Button)sender; //capture the event of all buttons

            if (resultValue != 0)

            {

                button28.PerformClick();

                operationPerformd = button.Text;

                textUpperLabel.Text = resultValue + " " + operationPerformd;

                isoperationIsPerformed = true;

            }

            else

            {

                operationPerformd = button.Text;

                resultValue = Double.Parse(textBox_Result.Text);

                textUpperLabel.Text = resultValue + " " + operationPerformd;

                isoperationIsPerformed = true;

            }

        }

        private void button10_Click(object sender, EventArgs e)

        {

            textBox_Result.Text = "0";

        }

        private void button16_Click(object sender, EventArgs e)

        {

            textBox_Result.Text = "0";

            resultValue = 0;

        }

        private void button28_Click(object sender, EventArgs e)

        {

            switch (operationPerformd)

            {

                case "+":

                    textBox_Result.Text = (resultValue + Double.Parse(textBox_Result.Text)).ToString();

                    break;

                case "-":

                    textBox_Result.Text = (resultValue - Double.Parse(textBox_Result.Text)).ToString();

                    break;

                case "*":

                    textBox_Result.Text = (resultValue * Double.Parse(textBox_Result.Text)).ToString();

                    break;

                case "/":

                    textBox_Result.Text = (resultValue / Double.Parse(textBox_Result.Text)).ToString();

                    break;

                    default:

                    break;

            }

            resultValue = Double.Parse(textBox_Result.Text);

            textUpperLabel.Text = "";

        }

        private void textUpperLabel_Click(object sender, EventArgs e)

        {

        }

    }

}

---

The output of the code

Helpful links for you as a dot net developer:

🔗 I made an image slide show using DotNet, visual studio & C#

🔗  Dot Net Technology practical and projects - BCA 5th Semester

🔗 C# practice questions for BCA 5th semester