How can I get rid of character repeat delay in C#?

Answer 1

You should be handling KeyDown and KeyUp rather than ProcessCmdKey if you want greater control over what happens between the time a key is pressed and released.

The absolute easiest thing to do in your scenario would be to have a timer on your form that moves the monster. Enable the timer (and set some sort of variable or deltaX and deltaY that indicates how to move the monster) when KeyDown is fired, then stop the timer when KeyUp is fired.

Edit

As an example (very barebones)

public class MyForm : Form
{
    private int deltaX;
    private int deltaY;

    private const int movementAmount = 10;

    private Timer movementTimer = new Timer();

    public MyForm()
    {
        movementTimer.Interval = 100; // make this whatever interval you'd like there to be in between movements

        movementTimer.Tick += new EventHandler(movementTimer_Tick);
    }

    void movementTimer_Tick(object sender, EventArgs e)
    {
        myMonster.Location = new Point(myMonster.X + deltaX, myMonster.Y + deltaY);
    }

    protected override void OnKeyDown(KeyEventArgs e)
    {
        base.OnKeyDown(e);

        switch (e.KeyCode)
        {
            case Keys.Left:
                {
                    deltaX -=movementAmount;
                } break;
            case Keys.Right:
                {
                    deltaX += movementAmount;
                } break;
            case Keys.Up:
                {
                    deltaY -= movementAmount;
                } break;
            case Keys.Down:
                {
                    deltaY += movementAmount;
                } break;
        }

        UpdateTimer();
    }

    protected override void OnKeyUp(KeyEventArgs e)
    {
        base.OnKeyUp(e);

        switch (e.KeyCode)
        {
            case Keys.Left:
                {
                    deltaX += movementAmount;
                } break;
            case Keys.Right:
                {
                    deltaX -= movementAmount;
                } break;
            case Keys.Up:
                {
                    deltaY += movementAmount;
                } break;
            case Keys.Down:
                {
                    deltaY -= movementAmount;
                } break;
        }

        UpdateTimer();
    }

    private void UpdateTimer()
    {
        movementTimer.Enabled = deltaX != 0 || deltaY != 0;
    }
}