Create a Simple Calculator in C# Windows form Application with Source Code

Object:

Create a Simple Calculator in C# Windows form Application with Source Code. C# windows form application projects with source code.

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 Lab_a

{

    public partial class Form1 : Form

    {

        double num1, num2, result;

        public Form1()

        {

            InitializeComponent();

        }

        private void textBox1_TextChanged(object sender, EventArgs e)

        {

        }

        private void button1_Click(object sender, EventArgs e)

        {

            num1 = Convert.ToDouble(textBox1.Text);

            num2 = Convert.ToDouble(textBox2.Text);

            result = num1 + num2;

            textBox3.Text = result.ToString();

        }

        private void button2_Click(object sender, EventArgs e)

        {

            num1 = Convert.ToDouble(textBox1.Text);

            num2 = Convert.ToDouble(textBox2.Text);

            result = num1 – num2;

            textBox3.Text = result.ToString();

        }

        private void button3_Click(object sender, EventArgs e)

        {

            num1 = Convert.ToDouble(textBox1.Text);

            num2 = Convert.ToDouble(textBox2.Text);

            result = num1 * num2;

            textBox3.Text = result.ToString();

        }

        private void button4_Click(object sender, EventArgs e)

        {

            num1 = Convert.ToDouble(textBox1.Text);

            num2 = Convert.ToDouble(textBox2.Text);

            result = num1 / num2;

            textBox3.Text = result.ToString();

        }

        private void button5_Click_1(object sender, EventArgs e)

        {

            textBox1.Text = “0”;

            textBox2.Text = “0”;

            textBox3.Text = “0”;

        }

        private void button6_Click(object sender, EventArgs e)

        {

            Application.Exit();

        }

        private void label5_Click(object sender, EventArgs e)

        {

        }

    }

}

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 Lab_a
{
    public partial class Form1 : Form
    {
        double num1, num2, result;
        public Form1()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(textBox1.Text);
            num2 = Convert.ToDouble(textBox2.Text);
            result = num1 + num2;
            textBox3.Text = result.ToString();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(textBox1.Text);
            num2 = Convert.ToDouble(textBox2.Text);
            result = num1 - num2;
            textBox3.Text = result.ToString();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(textBox1.Text);
            num2 = Convert.ToDouble(textBox2.Text);
            result = num1 * num2;
            textBox3.Text = result.ToString();
        }

        private void button4_Click(object sender, EventArgs e)
        {
            num1 = Convert.ToDouble(textBox1.Text);
            num2 = Convert.ToDouble(textBox2.Text);
            result = num1 / num2;
            textBox3.Text = result.ToString();
        }
        private void button5_Click_1(object sender, EventArgs e)
        {
            textBox1.Text = "0";
            textBox2.Text = "0";
            textBox3.Text = "0";
        }

        private void button6_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void label5_Click(object sender, EventArgs e)
        {

        }

    }
}

Output: