Keypress To Simulate A Button Click in C#

Question

Ok, so I'm in the process of making a Tic-Tac-Toe game to help me learn C#. I'm attempting to add a bit of functionality to it, so I want people to be able to use the NumPad on a computer to simulate clicking the buttons. Here is what I have but when I use the NumPad the buttons don't click. Can any of you see a reason as to why? ``` //=============================== // start NumPad Simulate Clicks // NumPad MyButtons // 7 8 9 1 2 3 // 4 5 6 4 5 6 // 1 2 3 7 8 9 //=============================== public void myControl_NumPad7(object sender, KeyPressEventArgs e) { if (e.KeyChar == (char)Keys.NumPad7) { button1_Click(null, null); } } public void myControl_NumPad8(object sender, KeyPressEventArgs e) { if (e.KeyChar == (char)Keys.NumPad8) { button2_Click(null, null); } } public void myControl_NumPad9(object sender, KeyPressEventArgs e) { if (e.KeyChar == (char)Keys.NumPad9) { button3_Click(null, null); } } public void myControl_NumPad4(object sender, KeyPressEventArgs e) { if (e.KeyChar ==…

Accepted Answer

EDIT Noticed that I have to be clearer about what I mean...

From the code you posted I suspect you have 9 controls you added your key-events to. These controls will only receive key-events when they are focused.

To handle keys globally for the form, you have to set `Form.KeyPreview` to `true`. Also, I'd not handle the keys the way you do, but add a `Form.KeyDown` event and write something like:

```
switch (e.KeyCode)
{
    case Keys.NumPad9:
        e.Handled = true;
        button3.PerformClick();
        break;
    case Keys.NumPad8:
        e.Handled = true;
        button2.PerformClick();
        break;
    // And so on
}
```

This will handle the NumPad-Keys within the form - you can then remove all the event handlers you posted in your question.

To programatically "click" a button, you should use the `Button.PerformClick()` method, as more than one event handler may be added to the click event, which would not be called otherwise.

EDIT 2 Syntax for the `switch`-statement was invalid. Of course every "case" must start with the `case` keyword... Now it should work.

Keypress To Simulate A Button Click in C#

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