Validations for a dialog based application

Question

Hi

How do i add validations to an edit box  in a dialog based application where i type the name like the first letter shud be a capital letter,no numerals or special characters  and the word limit etc...

Answer 1

http://www.flounder.com/validating_edit_control.htm

Answer 2

Thanks Scott.. but i dint understand much... :(
I googled and searched for some sample code but unable to get one clear solution.

If i want to use EM_LIMITTEXT i need to send it using SendDlgItemMessage. How do i do that? any sample code? please help..

Answer 3

Are you using MFC?  If so you would benefit greatly from studying an MFC book. 

To take your last question first, you right-click on the edit control and do 'Add Variable'.  This gives your dialog class a member variable CEdit m_someeditname.  Use that variable to call CEdit member functions.

m_someeditname.SetLimitText(n);

sets the text limit.  A big part of MFC is to give you such functions so you do not have to send messages.

To validate input to the edit control you start by deriving a class from CEdit.  And you add a message handler in that class for WM_CHAR.  The flounder.com tutorial shows such a function as CFloatingEdit::OnChar.  To make your CEdit-derived class work with m_someeditname you simply change CEdit to CFloatingEdit in the dialog header file.

Answer 4

Thanks again Scott.. Will try that..and yes am using MFC.

Answer 5

Hi KEERV,

Scott has given you a great sample and a detailed description. And I also found a good example in Codeproject for your reference:

Validating Edit Controls

Best Regards,
Nancy

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Answer 6

Yes Nancy thank you. I did google and had found this link and had gone through it. I found it a little difficult to understand.
After a little more of searching in the msdn forums and reading an mfc book like Scott suggested I have now found a simpler way of validating edit controls. :)
("simpler way" according to me.)