ListBox

C NewBe

I'm dumping data in a listbox using a loop. I would like the listbox to display the data after each iteration as oppose to after the loop is over, how do I do that?

CPallini

Threads?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Cedric Moonen

If you do that in one single thread, the UI won't be able to process messages anymore (because the main thread is busy in your loop). This way, it will freeze and process the messages only when you exit the loop. The way to solve this problem is either to create a worker thread that will send a message to the GUI each time a new item should be added in the list, or you can extract messages yourself from the queue and process them (GetMessage and DispatchMessage, see here[^] for some info).

Cédric Moonen Software developer
Charting control [v1.3]

C NewBe

I'm new to mfc...can you give me a kick start? also, would using a different control be better?

krmed

Another option is after you add each string to the listbox, call the UpdateWindow:

m_pMyListBox->AddString(_T("Whatever string"));
m_pMyListBox->UpdateWindow();

The UpdateWindow bypasses the normal message loop, so you can update that way. Hope that helps.

Karl - WK5M PP-ASEL-IA (N43CS) PGP Key: 0xDB02E193 PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

CPallini

Please detail your problem. For instance, if your need to represent a very large amount of data, a virtual list control [^] maybe an option. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

C NewBe

Karl, UpdateWindow has solved my problem...... Thanks How do I close this thread?

krmed

Glad I could be of assistance. I don't know how you mark a thread as completed or resolved. Perhaps someone else knows.

Karl - WK5M PP-ASEL-IA (N43CS) PGP Key: 0xDB02E193 PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

CPallini

C++NewBe wrote:

How do I close this thread?

Don't bother about, anyway you can modify the OP title (maybe adding [PROBLEM SOLVED] to the title). :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Hamid Taebi

You cna use of CListCtrl instead CListBox that is better.

David Crow

Exactly how does that solve the problem?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Hamid Taebi

I think listctl is bette than listbox and I think its better to try with listctrl so I said ctrl is better and its not direct his answer.