Listview_getitem() macro returns empty STRING in win32 api

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When I'm trying to remove the selected item from the list view, the "ListView_GetItem()" returns empty text. Here just added my code for getting selected text item from the list view.

LVITEM lvitem;
int item = ListView_GetNextItem(listView, -1, LVNI_SELECTED);

if (selectedItem != -1)
{
			wchar_t str[1024];
			lvitem.cchTextMax= 552;
			lvitem.mask= LVIF_TEXT;
			lvitem.iItem= selectedItem;
			lvitem.pszText= str;
			ListView_GetItem(listView, &lvitem);
			// Here Printing "lvi.pszText" text
}

Note: I'm using windows 10 OS. It's working correctly for me. But it's not working in few systems that also have same Windows 10 OS.

Give me any suggestions to resolve this problem...

What I have tried:

When I'm trying to remove the selected item from the list view, the "ListView_GetItem()" returns empty text. Here just added my code for getting selected text item from the list view.

LVITEM lvitem;
int item = ListView_GetNextItem(listView, -1, LVNI_SELECTED);

if (selectedItem != -1)
{
			wchar_t str[1024];
			lvitem.cchTextMax= 552;
			lvitem.mask= LVIF_TEXT;
			lvitem.iItem= selectedItem;
			lvitem.pszText= str;
			ListView_GetItem(listView, &lvitem);
			// Here Printing "lvi.pszText" text
}

Note: I'm using windows 10 OS. It's working correctly for me. But it's not working in few systems that also have same Windows 10 OS.

Posted 26-Mar-19 3:36am

Piraisudan

Updated 20-Apr-19 11:52am

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Comments

KarstenK 26-Mar-19 9:41am

typo: max char should be <512 :-O

Rick York 26-Mar-19 13:11pm

Have you tried to print str? That is where the text should be placed.

Piraisudan 26-Mar-19 13:47pm

Yes I tried. But it's working in some system and not working in some other system. What I'm missing? Or what's that reason?

3 solutions

Solution 3

Here is your fixed code:

LVITEM lvitem;
int item = ListView_GetNextItem(listView, -1, LVNI_SELECTED);

if (selectedItem != -1)
{
	wchar_t str[1024];
	lvitem.cchTextMax = 552;
	lvitem.mask = LVIF_TEXT;
	lvitem.iItem = selectedItem;
	lvitem.pszText = str;
	lvitem.iSubItem = 0;
	ListView_GetItem(listView, &lvitem);
	// Here Printing "lvi.pszText" text
}

Posted 20-Apr-19 11:52am

Michael Haephrati

Solution 2

I am surprised this works ANYWHERE. Try something like this :

C++

int selectedItem = ListView_GetNextItem(listView, -1, LVNI_SELECTED);
if( selectedItem != -1 )
{
    LVITEM lvitem = { 0 };
    const int strsize = 511;
    wchar_t str[strsize+1] = { 0 };
    lvitem.cchTextMax= strsize;
    lvitem.mask= LVIF_TEXT;
    lvitem.iItem= selectedItem;
    lvitem.pszText= str;
    ListView_GetItem( listView, &lvitem );
    // Here Printing "lvi.pszText" text
}

Posted 26-Mar-19 10:29am

Rick York

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CPallini · Accepted Answer · 2019-03-26T04:46:00

Solution 1

You didn't set lvitem.iSubItem = 0;
By the way, how do you check the return string?

Posted 26-Mar-19 4:46am

CPallini

Comments

Piraisudan 27-Mar-19 6:55am

Thanks, @CPillini... It worked like a charm...

CPallini 27-Mar-19 7:55am

You are welcome.