How to Create a WinForm Calculator in Visual Studio

 Windows Form Calculator

At first it was a challenge to build this calculator, but I found a good example out there and did it.  I am overwhelmed of the amount of logic and obstacles that went into creating this Windows form, but I finally triumphed.  I seized the day with this.

I had no reference material I could look at, but my computer at home.  I  was simply counting a programming book to search for answers, but I got none.  I am waiting for my C# book to arrive and I specifically ventured out today to find some kind of reference material at a bookstore, but I couldn't find a good book.  I had realized that relying on bookstores could be a dead end.  Now that I found an answer by google, I got my answer.  Yes!

This is just the beginning of the many applications that I try to overcome.  I plan to plug away and practice more to sharpen my C# programming skills.

Follow this code in your Visual Studio program and you will be on your way.

Here is the sample 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 Calculator2
{
    public partial class Calculator : Form
    {
        Double value = 0;
        string operation = "0";
        bool operation_pressed = false;
        public Calculator()
        {
            InitializeComponent();
        }

       

        private void button_Click(object sender, EventArgs e)
        {
            if ((result.Text == "0")|| (operation_pressed))
            {
                result.Clear();
            }

            Button b = (Button)sender;
            result.Text = result.Text + b.Text;
        }

        private void button18_Click(object sender, EventArgs e)
        {
            result.Text = "0";
        }

        private void operator_click(object sender, EventArgs e)
        {
            operation_pressed = false;
            Button b = (Button)sender;
            operation = b.Text;
            value = Double.Parse(result.Text);
            operation_pressed = true;
            equation.Text = value + " " + operation;
        }

        private void button16_Click(object sender, EventArgs e)
        {
            equation.Text = "";
            switch (operation)
                {
                case "+":
                    result.Text = (value + Double.Parse(result.Text)).ToString();
                    break;
                case "-":
                    result.Text = (value - Double.Parse(result.Text)).ToString();
                    break;
                case "*":
                    result.Text = (value * Double.Parse(result.Text)).ToString();
                    break;
                case "/":
                    result.Text = (value / Double.Parse(result.Text)).ToString();
                    break;
                default:
                    break;
            }//end switch
          

        }

        private void button17_Click(object sender, EventArgs e)
        {
            result.Text = "0";
            value = 0;
        }
    }
}