列表控件子项消失了吗? [英] List Control subitem disappear?

问题描述

以下是将项目插入listcontrl的代码.
当我将LVIF_PARAM 添加到lvi.mask时，仅显示第一个子项. (列表控件设置为报告查看模式).这是什么问题?

Hi,

The following is code to insert an item to listcontrl.
When i add LVIF_PARAM to lvi.mask, only first subitem is shown. (list control is set as report view mode). What is problem here??

m_lstCtrl.InsertColumn(0, L"First name" , LVCFMT_LEFT, onePercent * 35);
m_lstCtrl.InsertColumn(1, L"Middle name", LVCFMT_CENTER, onePercent * 35);
m_lstCtrl.InsertColumn(2, L"Last name", LVCFMT_LEFT, onePercent * 30);

LVITEM lvi;
// Insert #0
// Check if image available
lvi.mask = LVIF_TEXT | LVIF_PARAM ;
lvi.iItem = 0;				
lvi.iSubItem = 0;	
lvi.lParam = 100;
lvi.pszText =L"First";
m_lstCtrl.InsertItem(&lvi);
// Insert #1
lvi.iSubItem  = 1;
lvi.pszText = L"Middle";
m_lstCtrl.SetItem(&lvi);
// Insert #2
lvi.iSubItem = 2;
lvi.pszText = L"Last";
m_lstCtrl.SetItem(&lvi);

谢谢.

Quy

Thank.

Quy

推荐答案

快速的Google搜索显示，很多人在将LVIF_PARAM与子项一起使用时遇到问题.可能是一个错误.

尽量不要使用LVIF_PARAM.例如，您可以添加参数列表，并同时维护此列表和列表控件.

我知道此解决方案只是一种解决方法，但您可能会减少这样的时间.

A quick google search reveals that a lot of people has problems using LVIF_PARAM with sub items. It may be a bug.

Try not to use LVIF_PARAM. You can for example add a list of your param and maintain both this list and the list control.

I know this solution is just a workaround but you will probably loose less time like that.

感谢您的回复.
我发现它实际上不是错误.这有点微妙:)
LVITEM.mask(可能是整个LVITEM结构)应独立应用于每个子项目.我在上面的代码中的错误是我没有重置lvi.mask.

所以这是(至少就我而言)工作版本.

Thank for the replies.
It is actually not a bug, I figured it out. This is a little subtle :)
LVITEM.mask (probably whole LVITEM struct) should be independently applied for every subitems. My mistake in above code is that I didnt reset lvi.mask.

so here is (at least in my case) a working version.

m_lstCtrl.InsertColumn(0, L"First name" , LVCFMT_LEFT, onePercent * 35);
m_lstCtrl.InsertColumn(1, L"Middle name", LVCFMT_CENTER, onePercent * 35);
m_lstCtrl.InsertColumn(2, L"Last name", LVCFMT_LEFT, onePercent * 30);
 
LVITEM lvi;
// Insert First#0
// Check if image available
lvi.mask = LVIF_TEXT | LVIF_PARAM ;
lvi.iItem = 0;				
lvi.iSubItem = 0;	
lvi.lParam = 100;
lvi.pszText =L"First";
m_lstCtrl.InsertItem(&lvi);

// Insert Middle#1
lvi.mask = LVIF_TEXT;
lvi.iSubItem  = 1;
lvi.pszText = L"Middle";
m_lstCtrl.SetItem(&lvi);

// Insert Last#2
lvi.mask = LVIF_TEXT;
lvi.iSubItem = 2;
lvi.pszText = L"Last";
m_lstCtrl.SetItem(&lvi);

Quy

Quy

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