Solved

How to use ListCtrl's GetItem

Posted on 1998-09-03
3
564 Views
Last Modified: 2013-11-20
I need to retrieve the pzsText from a listctrl item.
I only know its iItem value.  The code below i tried keep crashing.

LV_ITEM lv ;
lv.mask = LVIF_TEXT ;
lv.iItem = 10 ; // e.g. i need the pszText from item No.10
m_listCtrl.GetItem(&lv);

CString psz = lv.pszText ;

Any suggestion?
0
Comment
Question by:leowlf
  • 2
3 Comments
 

Author Comment

by:leowlf
ID: 1321658
Edited text of question
0
 
LVL 8

Accepted Solution

by:
Answers2000 earned 50 total points
ID: 1321659
Answer in my comment below (takes me time to type)
0
 
LVL 8

Expert Comment

by:Answers2000
ID: 1321660
Basically your code is almost right, but there's a couple of problems:

1. The main problem is it's upto you to supply the buffer pointed to by LV_ITEM (and it's size).  The reason for the crash is that you don't supply the buffer, and where-ever lv.pszText happens to get point (probably NULL) will get overwritten.

2. You really should explicity intiialize the iSubItem member of lv to 0 (or a subitem).  The compiler will not necessarily do this for you

3. It would probably also be a good idea to check the return value of GetItem

The fixed code is then
char szBuffer[256] ;
LV_ITEM lv ;
lv.mask = LVIF_TEXT ;
lv.iItem = 10 ;
lv.iSubItem = 0 ;
lv.pszText = szBuffer ;
lv.cchTextMax = sizeof szBuffer ;
CString strValue ;
if ( m_listCtrl.GetItem(&lv) )
{
   strValue = szBuffer ;
}


One final point, if you are only ever retreiving the text, have you considered using GetItemText member of CListCtrl, example:

CString strValue ;
strValue = m_listCtrl.GetItemText( 10, 0 ) ; // first param is iItem, second is iSubItem
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
MFC Dialog 9 52
sumDigits challenge 9 171
difference between String.subString() and String.subSequence() 6 258
Problem to App 4 116
Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Introduction: Load and Save to file, Document-View interaction inside the SDI. Continuing from the second article about sudoku.   Open the project in visual studio. From the class view select CSudokuDoc and double click to open the header …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.

679 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