an Edit control , just, for float numbers

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Hi,
In my VC++ project, I want an Edit control that it ignores write anything except integer numbers and Dot(.) for giving float numbers.

I write a MyEdit class deived CEdit, in OnKeyDown() event :

UINT asciiCode = MapVirtualKey(nChar, 2);
	if( (asciiCode >= 48 && asciiCode <= 57) || asciiCode == 46)
		CEdit::OnKeyDown(nChar, nRepCnt, nFlags);
	else 
		nChar = 0;

But the Edit Box gives any characters!
How do i ignore other characters?

Posted 5-Jul-15 22:28pm

Zon-cpp

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Marc Hausmann · Answer 1 · 2015-07-05T22:43:00

Solution 1

What you can do is to implement a class extension of CEdit. Inside the OnChar or OnKeyUp event you can get the text of your control, check for conformity an correct if necessary.

Posted 5-Jul-15 22:43pm

Marc Hausmann

Comments

Zon-cpp 6-Jul-15 5:19am

In OnKeyUp event, what do I do when the text of control is a character else 'numbers' and 'dot'?

Marc Hausmann 6-Jul-15 5:41am

The on key up should give you the char value of the pressed key. In case of a character just return, in case of a digit add it to the control text, if a dot, check how many dots you have in the string and add it only if there are none.

barneyman 8-Jul-15 6:32am

dont forget to handle paste, and selection edits