CTreeCtrl中调用SortChildrenCB()后，为什么没反应？

[oiq]

int CALLBACK MyCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
// lParamSort contains a pointer to the tree control.
// The lParam of an item is just its handle,
// as specified with SetItemData
CTreeCtrlEx2 * pTree = (CTreeCtrlEx2 *) lParamSort;
HTREEITEM hItem1 = (HTREEITEM) lParam1;
HTREEITEM hItem2 = (HTREEITEM) lParam2;

CString strItem1 = pTree->DoLocStringFromItem(hItem1);
CString strItem2 = pTree->DoLocStringFromItem(hItem2);


return strcmp(strItem2, strItem1);
}


TVSORTCB tvs;
tvs.hParent = TVI_ROOT;
tvs.lpfnCompare = MyCompareProc;
tvs.lParam = (LPARAM) this;

BOOL b = SortChildrenCB(&tvs);
执行这句后，按理说应该调用上面的回调函数，但却没有调，这是为何！

[blackblue]

你在构造树的时候有没有对每个tree item调用SetItemData函数？

[zyoujie]

up

[oiq]

我好象没有，这个有影响吗？

[DoubleJiang]

这个好像有问题
HTREEITEM hItem1 = (HTREEITEM) lParam1;

LPTVITEM lpItem1 = (LPTVITEM) lParam1;

[zhucde]

up

[oiq]

to DoubleJiang(Double):
没什么问题啊！

[blackblue]

// lParamSort contains a pointer to the tree control.
// The lParam of an item is just its handle,
// as specified with SetItemData

这个注释说得很清楚，参数lParam是通过调用SetItemData设置的tree item的handle，
所以在构造树的时候应该调用SetItemData，
HTREEITEM h = m_Tree.InsertItem(....);
m_Tree.SetItemData(h, (DWORD)h);

这样才能保证排序函数能够传递正确的参数到你的回调函数中

[oiq]

还是不行啊，
BOOL b = SortChildrenCB(&tvs);
结果b是TRUE，也就是说成功执行了。但树中跟本就没按我的要求排序！

[oiq]

OK,成功了，原来
tvs.hParent 必须指定为要排序的那些ITEM的父ITEM

感谢大家的帮助，谢谢！


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