Multi Line ListBox

My application is developig in VC++ 2008. I have a List Box. Where I am Loading some Text data from a text file. After Loaded the listBox is as show in the attached figure :

I have used it as a SINGLE SELECTION List Box. Here I would like to change as MULTILINE SELECTION so as to delete the selected List BOX datas.

For the Single Line Delete operation I have written the following code.

Code:

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      CListBox m_parameterlist;
        unsigned int len = m_parameterlist.GetCurSel();

        if(len==LB_ERR)
        {
                len = m_parameterlist.GetCount();
                len = len-1;
        }
        int current = m_parameterlist.DeleteString(len);
        int newcnt = m_parameterlist.GetCount();       
        CString str;
        if(newcnt>0)
        {
                for(int i = 0;i < newcnt;i++)
                {
                        m_parameterlist.GetText( i, str );
                }
        }
        else
                _asm nop;

---

This has worked. The single line deleted and the remaining datas listed on ListBx But Now the User requirment got modified. I have changed the property to MULTILINE SELCTION. But the coding is confused.... Can u help me plz...

1. Your code is a little strange: what for are you using

Code:

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_asm nop;

---

2. To delete items in a listbox with multi-selection you have to call CListBox::GetSelItems , then sort the item indexes in a buffer and then delete selected items in a loop beginning from the max index.

Sorry...In my appln, certain data is communicating with hardware.thats wy I have used certain assembly codes for error elimination.....Leave it...

Can u help me for coding it...I've tried it nw..bt failing..can u sugggest any such codes...

Start with the example from MSDN article CListBox::GetSelItems
I hope, a simple sorting algorithm won't be a problem for a programmer being able to program with Assembler for hardware! ;)

Assembler is extremely different from GUI concepts..... While working on GUI based pgms,I have struggled several times n the CodeGurus like u helped me a lot... tats wy am here for getti ng it. I've tried the same example.. It gets the Count of Total selected items.But How to select particular indices for Delete????

The CArray<int,int> aryListBoxSel contains the indexes of selected items.

lemme try more...... n come back 2 u..thanx....

As like the above said procedure..I've written the code as

Code:

---

  int iTot = m_parameterlist.GetCount();
        iTot-=1;
        int len=m_parameterlist.GetSelCount();
        CArray<int,int> arySel;
        arySel.SetSize(len);
        int newval=m_parameterlist.GetSelItems(len, arySel.GetData());
        int iNew=iTot-len;
       
        for(int i=0;i<=len;i++)
        {
                int current = m_parameterlist.DeleteString(i);
        }

---

It deletes data..But not in order...Having some bugs...... Can anybody help to fix it????

Please, read the documentation (MSDN).

PS: BTW, why did you get the arySel with the item indexes if you don't use it at all? :confused::thumbd:

Your question makes rethinking on me..
Bt after several try & error....... I reached here... n copied it here....
Ok.. So 1) how do I delete the exact Selected indexes....?
2)The return of . newval gets the Total Count of selected lines......!!!!!
got the logic..bt stucks some where......... ???

Please, read MSDN carefully!

Quote:

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CListBox::GetSelItems

Fills a buffer with an array of integers that specifies the item numbers of selected items in a multiple-selection list box.

int GetSelItems(
int nMaxItems,
LPINT rgIndex
) const;

Parameters
nMaxItems

Specifies the maximum number of selected items whose item numbers are to be placed in the buffer.

rgIndex

Specifies a long pointer to a buffer large enough for the number of integers specified by nMaxItems.

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and remember to delete them from the highest index downwards...