Windows窗体计算器-输入的数字键

Question

I am currently in the middle of learning c# for my job, I have been trying some starter projects and i decided to make a calculator, I have all of the functions of a simple calculator working, however i can not get the numpad keys to work with a keypress event or a keydown event, I am wondering if someone can help me in some detail, i am wanting to sett all of the numpad keys to the corrspondings ones on the calculator, here is the code i have tried for the keypress event and i have also tried this with numpad lock on and off.

 private void n1_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyChar = '1')
        {
            e.Handled = true;
            n1.PerformClick();

        }

    }

Just a quick edit, i have tried to follow MSDN example and include the following

private void n1_KeyDown(object sender, KeyEventArgs e) {

        if (e.KeyCode < Keys.D0 || e.KeyCode > Keys.D9)
        {
            if (e.KeyCode < Keys.NumPad0 || e.KeyCode > Keys.NumPad9)
            {
                nonNumberEntered = true;
            }
        }

And still no success

Answer 1

Refer to MSDN Key Enum page for reference.

eg Keys.NumPad0 is on keypad, Keys.D0 is the number key. So you want to do something like this

if (e.KeyCode == Keys.NumPad0 || e.KeyCode == Keys.D0)

And also you probably want to map the operators, eg Keys.Add for your add.

Answer 2

Check what the equals operator should be.

if (e.KeyChar == '1')

(You won't be the last person to fall down that particular hole, trust me....)

Answer 3

尝试使用比较而不是分配。