Keydown event doesn't work properly....

[c00012]

Hey guys,

I'm writing a code for simple calculator to study UWP app development.
I wanted to input number and operator through keyboard.

Here's the code:

/

/code of keydown event of number key and numeric keyboard
void App2::MainPage::NumKey_Down(Platform::Object ^ sender, Windows::UI::Xaml::Input::KeyRoutedEventArgs^ e)
{
	if ((int)e->Key >= '0' && (int)e->Key <= '9')//number key 
		txtOutput->Text += ((int)e->Key - '0').ToString();
	else if ((int)e->Key >= 96 && (int)e->Key <= 105)//numeric keypad. 96 = 0, 105 = 9
		txtOutput->Text += ((int)e->Key - 96).ToString();
	else if ((int)e->Key == 67)//'c' key for reset input
		txtOutput->Text = "";
}

//code of keydown event of operator key(+,-.*,/)
void App2::MainPage::ArithKey_Down(Platform::Object ^ sender, Windows::UI::Xaml::Input::KeyRoutedEventArgs ^ e)
{
	//Get the string from the display, convert it to a number, and then store it as the left operand
	leftOperand = ConvertTextToInt(txtOutput->Text);
	int Op = (int)e->Key;

	if (Op == 107)
		currentOp = ArithOp::PLUS;
	else if (Op == 109)
		currentOp = ArithOp::MINUS;
	else if (Op == 106)
		currentOp = ArithOp::TIMES;
	else if (Op == 111)
		currentOp = ArithOp::DIVIDE;

	//Clear the display
	txtOutput->Text = "";
	clearOnNextKey = false;
}

I tested these using "123+456=579" scenario.
result:
1. inputting "123" works well.
2. "+" key downs't work.

I can't find out what's wrong with the code.
If anyone pick error for me, I'd very appreciate of it.

thanks,
c00012

[Thomas1965]

What is it? WPF or sth. else?

[bigmansq]

And did you wrap it in a document ready ?

[c00012]

this code is written in C++/CX.

[Thomas1965]

I am afraid not many people around here you know this stuff.
Maybe try http://www.dreamincode.net/forums/