KeyDown事件不会引发

Question

I have a form with a button in. I want to capture the Form.KeyDown event.

private void buttonStart_Click(object sender, EventArgs e)
{
   if (!this.gameRunning)
   {
       this.buttonStrat.Text = "Pause";
       this.timer1.Enabled = true;
   }
   else
   {
       this.buttonStart.Text = "Continue";
       this.timer1.Enabled = false;
   }
   this.gameRunning = !this.gameRunning;
}

However, I was disabling buttonStart without supporting PAUSE and it was working nice. Since I have added the PAUSE advantage, the Form.KeyDown event doesn't raise and buttonStart is Focuse d. Whenever I disable buttonStart , it fires.

NOTES:

• I have set Form.KeyPreview to true , stills doesn't raise
• I have set Form.AcceptButton to null , stills doesn't raise
• I have made buttonStart subscriped to Form.KeyDown , stills doesn't.

Answer 1

I hope this will helps you ..

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Override IsInputKey behaviour

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You must override the IsInputKey behavior to inform that you want the Right Arrow key to be treated as an InputKey and not as a special behavior key. For that you must override the method for each of your controls. I would advise you to create your won Buttons, let's say MyButton

The class below creates a custom Button that overrides the IsInputKey method so that the right arrow key is not treated as a special key. From there you can easily make it for the other arrow keys or anything else.

    public partial class MyButton : Button
    {
        protected override bool IsInputKey(Keys keyData)
        {
            if (keyData == Keys.Right)
            {
                return true;
            }
            else
            {
                return base.IsInputKey(keyData);
            }
        }
    }

---

Afterwards, you can treat your keyDown event event in each different Button or in the form itself:

In the Buttons' KeyDown Method try to set these properties:

private void myButton1_KeyDown(object sender, KeyEventArgs e)
{
  e.Handled = true;
  //DoSomething();
}

-- OR --

handle the common behaviour in the form: (do not set e.Handled = true; in the buttons)

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    //DoSomething();
}