为什么WinForms中的textBox无法显示双倍？

Question

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 P2_7_24_2016_ED_app
{
    public partial class Form1 : Form
    {
        int win;
        int loss;
        int winCounter;
        int lossCounter;
        public Form1()
        {
            InitializeComponent();
        }

        private void buttonWin_Click(object sender, EventArgs e)
        {
            this.textBoxWin.Text = "";
            ++win;
            ++winCounter;
            this.textBoxWin.Text = win.ToString();
        }

        private void buttonLoss_Click(object sender, EventArgs e)
        {
            this.textBoxLoss.Text = "";
            ++loss;
            ++lossCounter;
            this.textBoxLoss.Text = loss.ToString();
        }

        private void buttonRate_Click(object sender, EventArgs e)
        {
            textBox1.Text = "";
            double result = winCounter / (winCounter + lossCounter);
            textBox1.Text = result.ToString();
        }
    }
}

This is the code in windows form application, its short so i'm not going to explain everything. Problem is that in the end textBox1.Text = result.ToString(); is showing "0", but it should be some numbers. When the win winCounter is like 1, and lossCounter is 1 it should insert 1/(1+1) = 0.5 but it says "0". I tried everything i knew so please give me a tip.

Answer 1

This is integer arithmetic:

(winCounter/(winCounter+lossCounter))

The result is not going to be what you expect.

Cast either winCounter or (winCounter+lossCounter) to a floating point type (float, double or decimal depending on the speed/accuracy you need) before doing the division:

 (winCounter/(decimal)(winCounter+lossCounter))

or

 ((double)winCounter/(winCounter+lossCounter))

and you'll get the result you expect.

Answer 2

As described in the comments, you will need to cast your result. This should work:

textBox1.Text = (winCounter/(double)(winCounter+lossCounter)).ToString();