KeyCode handles key presses

You have a TextBox control on your Windows Forms application and need to detect Enter. With KeyCode, we can detect keys.

Solution info

Our solution involves the KeyDown event in our C# Windows Form and the KeyCode property. This code can make programs more interactive by detecting key presses.

First, click on your TextBox control in the form display. You will see the Properties Pane. Click on the lightning bolt icon. This icon stands for events: we use it to create events.

using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Linq;

namespace WindowsProgramNamespace
{
    public partial class TextWindow : Form
    {
        public TextWindow()
        {
            InitializeComponent();
        }

        private void textBox1_KeyDown(object sender, KeyEventArgs e)
        {

        }
    }
}

Example 2

Here is the code that detects when Enter is pressed. Keys is an enumeration, and it stores special values for many different keys pressed. KeyCode must be compared to Keys.

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        // Enter (return) was pressed.
        // ... Call a custom method when user presses this key.
        AcceptMethod();
    }
}

Summary

We used KeyCode in the KeyDown event to check against the Keys enumeration to detect the Enter key. It is possible to check many other keys.