Solved

MFC: verifying Edit Control input

Posted on 2008-06-18
3
1,293 Views
Last Modified: 2013-11-20
I'm having some trouble verifying MFC Edit Box data (the box where users type in data). Here's what I need to verify:

- the user types an integer into the edit box, which can be negative
- the verification function should ensure the integer is within a certain range
- if it is an illegal value, it must be changed to some default legal value

The verification function is trivial, but what Edit Box event it is attached to is causing issues. Right now I have the input verification even attached to "EN_CHANGE" but that seems to be causing problems since it runs on every character types. Is there a more appropriate input to attach the verification function to?

Is there a way to not verify the Edit Box data until the user is done inputting? Perhaps by hitting enter or something?
0
Comment
Question by:Fippy_Darkpaw
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 21814778
See http://www.codeproject.com/KB/edit/ValidatingTextBoxControls.aspx ("Validating Edit Controls") - this article comes with full source code and demonstrates how to do that.
0
 
LVL 86

Assisted Solution

by:jkr
jkr earned 100 total points
ID: 21814807
Sorry, wrong link, the above is managed code. See http://www.codeproject.com/KB/edit/validatingedit.aspx ("Validating Edit Controls"). The same applies, full source code - even the author is the same person.
0
 
LVL 19

Accepted Solution

by:
alb66 earned 150 total points
ID: 21819880
You must handle EN_KILLFOCUS:

BEGIN_MESSAGE_MAP(CYourDlg, CDialog)
      ON_EN_KILLFOCUS(IDC_EDIT1, OnEnKillfocusEdit1)
END_MESSAGE_MAP()

void CYourDlg::OnEnKillfocusEdit1()
{
      // do something here...
}
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. A brief on problem: Lets take example problem for simplicity: - I have a G…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question