IsKindOf（RUNTIME_CLASS（CHeader ... [英] IsKindOf ( RUNTIME_CLASS ( CHeader...

问题描述

void CListView::OnInitialUpdate()
{
	CListView::OnInitialUpdate();


	// TODO: You may populate your ListView with items by directly accessing
	//  its list control through a call to GetListCtrl().

	
	// Add the parent item
	GetListCtrl().InsertColumn(0, _T("Column Text"), LVCFMT_LEFT, 200);
	
	GetListCtrl().SetImageList(&m_ImageSmall, LVSIL_SMALL);
	GetListCtrl().SetImageList(&m_ImageLarge, LVSIL_NORMAL);

	// Add children
	for( int i = 1; i < 5; i++ ) {
		GetListCtrl().InsertItem (0, _T("Child of Parent Item"));
	}

	CHeaderCtrl hc;
	if (hc.IsKindOf(RUNTIME_CLASS(CHeaderCtrl)))
	{
		int i = 0;//ok
	}

	if (GetListCtrl().GetHeaderCtrl()->IsKindOf(RUNTIME_CLASS(CHeaderCtrl)))
	{
	        //fail to step in, why?
		HWND hWndHeader = GetListCtrl().GetDlgItem(0)->GetSafeHwnd();
		m_flatHeader.SubclassWindow (hWndHeader);
	
	}
}

为什么它无法进入第二个if？

Why is it unable to step into the second "if"?

推荐答案

请检查您的列表视图是否使用LVS_REPORT样式创建。如果没有，请添加此样式。

Please check whether your list view is created using LVS_REPORT style. If not, add this style.

IsKindOf仅在满足某些条件时才有效。



http://msdn.microsoft.com/en-us/library/b7tsah76.aspx [ ^ ]



你正在做的测试似乎是多余的：

IsKindOf only works if certain conditions are met.

http://msdn.microsoft.com/en-us/library/b7tsah76.aspx[^]

The test you are doing seems redundant:

GetListCtrl().GetHeaderCtrl()->IsKindOf(RUNTIME_CLASS(CHeaderCtrl))

GetListCtrl（）。GetHeaderCtrl（）返回CHeaderCtrl或NULL。就是这样。



http：// msdn .microsoft.com / zh-CN / library / c4s15zsx.aspx [ ^ ]

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