asked on

Clearing MFC Combo Box for repopulating

I have a combo box whose displayed list is dependent upon another user selection. When the user makes the selection,
the code:

ModelCount = m_modelCombo.GetCount();

for (i=0; i<ModelCount; i++)
m_modelCombo.DeleteString(i);

is executed. The combo box "m_modelCombo" is the given new values through the AddString method.

The new values are being displayed, but the previous values are partially left over, and the list continues to grow with each update attempt. What am i missing?

Randy

fuzzyjon79

Have you tried using UpdateData(TRUE) to your code? I would add the UpdateData(TRUE); line right underneath the m_modelCombo.DeleteString(i); line. If that does not work try using UpdateData(FALSE); I can't remember which one would work but try either one to see if that fixes your problem. Hope that this helps.

Jon

subhadeepin

hi
Instead of using AddString; use InsertString.

for (int i=0; i<m_combo1.GetCount(); i++)
m_combo1.DeleteString(i);
m_combo1.InsertString(0,"*.iii");
m_combo1.InsertString(1,"*.kkk");

That shall do the work for you

cox8355

ASKER

Thanks...but...tried both of these, but the problem remains. Portions of the previous list still linger after supposedly being deleted. For example, this is what typically happens:

First list: Second list: ...etc.

1st_Item_1 2nd_Item_1
1st_Item_2 2nd_Item_2
1st_Item_3 2nd_Item_3
1st_Item_4 2nd_Item_4
1st_Item_5 2nd_Item_5
1st_Item_2
1st_Item_4

Any other ideas?

Thanks

subhadeepin

This codes works perfectly well
Check it out

int temp=m_combo1.GetCount();
int text1;

for(int i=temp;i>=0;--i)
text1=m_combo1.DeleteString(i);

m_combo1.InsertString(0,"hi");
m_combo1.InsertString(1,"hello");

m_combo1.SetCurSel(0);

ASKER CERTIFIED SOLUTION

subhadeepin

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cox8355

ASKER

Thanks!

Still somewhat of a mystery for this reason...I was going from element 0 to (GetCount-1), where your loop was (GetCount) to 0.

I thought if GetCount returned, say, 10, that the elements would be referenced from 0 to 9. Your loop deletes elements 10 through 0....one more than it seems it should...??? Maybe I'm missing something that I'll see later...but it works.

Many thanks,
Randy

SOLUTION

LSkywalker

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bcladd

No comment has been added lately, so it's time to clean up this TA. I will
leave a recommendation in the Cleanup topic area that this question is:

Answered: Points split between subhadeepin and LSkywalker

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