Respond to multiple KeyDown events

Question

I\'m making a simple WinForm car race game. I\'ve got two objects - cars, and they move on the form when key is pressed (Form1KeyDown_Event).

The only thing is, that wh

Answer 1

Here's a simple example of what you can do in order to listen to several keys at the same time, using the keyup and keydown events instead.

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace WinFormTest {
    public partial class Form1 : Form {
        private readonly IDictionary downState;

        public Form1() {
            InitializeComponent();
            downState = new Dictionary();
            downState.Add(Keys.W, false);
            downState.Add(Keys.D, false);

            KeyDown += remember;
            KeyUp += forget;
        }

        protected override void OnLoad(EventArgs e) {
            base.OnLoad(e);
            Timer timer = new Timer() { Interval = 100 };
            timer.Tick += updateGUI;
            timer.Start();
        }

        private void remember(object sender, KeyEventArgs e) {
            downState[e.KeyCode] = true;
        }

        private void forget(object sender, KeyEventArgs e) {
            downState[e.KeyCode] = false;
        }

        private void updateGUI(object sender, EventArgs e) {
            label1.Text = downState[Keys.W] ? "Forward" : "-";
            label2.Text = downState[Keys.D] ? "Right" : "-";
        }
    }
}