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Help!!! How to know whether the user has finished writing in edit box?

Posted on 2000-02-25
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Last Modified: 2013-11-20
Hi,

I want the user to enter the name of a file in an edit box, my qn is:

1. how to know the user has finished writing?
2. how to know if the user did not write anything? (for error checking purpose)

Pls help!

Thanks a lot!
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Question by:greenbird
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6 Comments
 
LVL 10

Expert Comment

by:RONSLOW
ID: 2560381
1) When the control looses focus (because he has tabbed/moved out to another control, or pressed enter)

2) see if the test is empty.
0
 
LVL 3

Expert Comment

by:akalmani
ID: 2560384
Hi
  Hook a message hanlder for edit box i.e OnKillFocus() , Do all the things there. U can get to know whether the user typed anything or not
0
 
LVL 10

Expert Comment

by:RONSLOW
ID: 2560394
Best to use DDX_Text to associate a CString member var with the control.  Then add an ON_EN_KILLFOCUS (which would call, say, OnKillfocusEditbox) to the message map.

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Author Comment

by:greenbird
ID: 2560423
Hi, all,

could u pls illustrate more? i am new to VC++, so can not get it, could u pls provide some examples?
such as, the code written in the functions etc.

thanks a lot!
0
 
LVL 10

Accepted Solution

by:
RONSLOW earned 40 total points
ID: 2560442
I assume you have a dialog with an edit box in it.

Go to the dialog edit.

Ctrl+Double Click on the edit control to add a member variable of type CString.

Ctrl+W to bring up the Class Wizard.

Select the ID for your edit control.  Select the kill focus message from the list and add a handler for it, push the edit code button to take you to the code.

This function will be called when the user has finished typing in the control .  Do whatever you want there.  In particular you can look at the CString member variable you created above to see if it is empty (.IsEmpty() function).

That should do it.

If you have problems, try some of the tutorials (like Scribble) that take you through these steps.

Or come back here for some more help.
0
 

Author Comment

by:greenbird
ID: 2560571
Hi,

thanks , i will try it later :)

wish u a happy weekend.
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