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

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? :confused:

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

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

Quote:

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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

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

Quote:

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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

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I can't find anything like it?

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

Via atof.

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

Code:

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void CVGRTaxDlg::OnButtCalc() {

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

}

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The application compiles but crashes.

Nevermind. The crash was being caused elsewhere :rolleyes:

Here's what I'm using:

Code:

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

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And it works great. Thanks.

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

www.boost.org