[Resolved] MFC: "Please enter a number?"

[The Hobo]

I'm working in an MFC application (my first time), and whenever I erase the contents of my EditBox, or enter a non-numeric character, I get a messagebox saying "Please enter a number."

How can I get rid of this?

[dis1411]

r u using UpdateData(TRUE) instead of UpdateData(FALSE)
also check to make sure the variable u have linked to it is string or cstring

[McCain]

I think I read somewhere that there's a checkbox in the EditBox's properties that checks to make sure everything entered is a number. Make sure that checkbox is not selected

[The Hobo]

Originally posted by dis1411
r u using UpdateData(TRUE) instead of UpdateData(FALSE)
also check to make sure the variable u have linked to it is string or cstring

Yes, I'm using UpdateData(TRUE), but I'm using float for the type? Can I not do that?

Originally posted by McCain
I think I read somewhere that there's a checkbox in the EditBox's properties that checks to make sure everything entered is a number. Make sure that checkbox is not selected

I can't find anything like it?

[The Hobo]

Well, how can I convert a CString to a float?

[CornedBee]

Via atof.

[The Hobo]

How would I do that? This doesn't seem to work:

void CVGRTaxDlg::OnButtCalc() {

    MyTax.SetTaxableIncome(atof(m_IncomeAmount));
    m_iTaxAmount = MyTax.GetTaxAmount();
		
    CVGRTaxDlg::OnChangeEditTax();

}

The application compiles but crashes.

[The Hobo]

Nevermind. The crash was being caused elsewhere

Here's what I'm using:

MyTax.SetTaxableIncome(static_cast<float>(atof(m_IncomeAmount)));

And it works great. Thanks.

[CornedBee]

There are two additional options: an istringstream or the boost lexical_cast.

www.boost.org