请教关于CListCtrl中单击Header对表中数据排序的实现方法.

[Atan]

应该使用哪个消息获得用户对哪列的header单击了.
另外,是不是应该使用::SortItem成员函数.
它的参数我看不明白,请各位前辈执教.
一揖到地.

[WHQ]

给你一个例子，做的不是很好：
#if !defined(AFX_NEWLISTCTRL_H__8C532984_C739_11D3_A6D6_444553540000__INCLUDED_)
#define AFX_NEWLISTCTRL_H__8C532984_C739_11D3_A6D6_444553540000__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// NewListCtrl.h : header file
//

/////////////////////////////////////////////////////////////////////////////
// CNewListCtrl window
#define LVS_NOTSORT 0x00
#define LVS_SORTSTRING 0X01
#define LVS_SORTINTEGER 0X02
#define LVS_SORTDECIMAL 0X03
#define LVS_SORTDATE 0X04

class CNewListCtrl : public CListCtrl
{
// Construction
public:
CNewListCtrl();

// Attributes
public:
static CNewListCtrl * m_pOuter;
CArray<BYTE,BYTE> m_SortType;
// Operations
public:

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CNewListCtrl)
//}}AFX_VIRTUAL

// Implementation
public:
void ReSetItemData();
int CompareDate(LPARAM lParam1,LPARAM lParam2,LPARAM lParamSort);
int CompareNumber(LPARAM lParam1,LPARAM lParam2,LPARAM lParamSort);
int CompareString(LPARAM lParam1,LPARAM lParam2,LPARAM lParamSort);
friend int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort);
virtual ~CNewListCtrl();

// Generated message map functions
protected:
//{{AFX_MSG(CNewListCtrl)
afx_msg void OnColumnclick(NMHDR* pNMHDR, LRESULT* pResult);
afx_msg void OnDeleteitem(NMHDR* pNMHDR, LRESULT* pResult);
//}}AFX_MSG

DECLARE_MESSAGE_MAP()
};

typedef struct tagSortItemlParam{
long lProductID;
int nIndex;
}SortItemlParam;
/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_NEWLISTCTRL_H__8C532984_C739_11D3_A6D6_444553540000__INCLUDED_)
// NewListCtrl.cpp : implementation file
//

#include "stdafx.h"
#include "QChannels.h"
#include "NewListCtrl.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

CNewListCtrl * CNewListCtrl::m_pOuter = 0;

/////////////////////////////////////////////////////////////////////////////
// CNewListCtrl

CNewListCtrl::CNewListCtrl()
{
m_pOuter = this;
}

CNewListCtrl::~CNewListCtrl()
{
}


BEGIN_MESSAGE_MAP(CNewListCtrl, CListCtrl)
//{{AFX_MSG_MAP(CNewListCtrl)
ON_NOTIFY_REFLECT(LVN_COLUMNCLICK, OnColumnclick)
ON_NOTIFY_REFLECT(LVN_DELETEITEM, OnDeleteitem)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CNewListCtrl message handlers
void CNewListCtrl::OnColumnclick(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
// TODO: Add your control notification handler code here
if(m_SortType[pNMListView->iSubItem] & 0x80)
m_SortType[pNMListView->iSubItem] &= ~0x80;
else
m_SortType[pNMListView->iSubItem] and = 0x80;
if(m_SortType[pNMListView->iSubItem] & 0x7F != 0x00)
SortItems(CompareFunc,pNMListView->iSubItem);
ReSetItemData();
*pResult = 0;
}

int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
int result = 0;
BYTE SortType = (CNewListCtrl::m_pOuter)->m_SortType[lParamSort];
switch(SortType & 0x7F)
{
case LVS_SORTSTRING:
result = (CNewListCtrl::m_pOuter)->CompareString(lParam1,lParam2,lParamSort);
break;
case LVS_SORTINTEGER:
result = (CNewListCtrl::m_pOuter)->CompareNumber(lParam1,lParam2,lParamSort);
break;
case LVS_SORTDECIMAL:
result = (CNewListCtrl::m_pOuter)->CompareNumber(lParam1,lParam2,lParamSort);
break;
case LVS_SORTDATE:
result = (CNewListCtrl::m_pOuter)->CompareDate(lParam1,lParam2,lParamSort);
}
return SortType & 0x80 ? result : -result;
}

int CNewListCtrl::CompareString(LPARAM lParam1, LPARAM lParam2,LPARAM lParamSort)
{
CString string1 = GetItemText( ( (tagSortItemlParam*)lParam1 )->nIndex,lParamSort );
CString string2 = GetItemText( ( (tagSortItemlParam*)lParam2 )->nIndex,lParamSort );
int result = string1.Compare(string2);
return result;
}

int CNewListCtrl::CompareNumber(LPARAM lParam1, LPARAM lParam2,LPARAM lParamSort)
{
float dNum1,dNum2;
CString string1 = GetItemText( ( (tagSortItemlParam*)lParam1 )->nIndex,lParamSort );
CString string2 = GetItemText( ( (tagSortItemlParam*)lParam2 )->nIndex,lParamSort );
dNum1 = atof(string1);
dNum2 = atof(string2);
if(dNum1 > dNum2)
return 1;
else if(dNum1 < dNum2)
return -1;
else if(dNum1 == dNum2)
return 0;
return 0;
}


int CNewListCtrl::CompareDate(LPARAM lParam1, LPARAM lParam2,LPARAM lParamSort)
{
CString string1 = GetItemText( ( (tagSortItemlParam*)lParam1 )->nIndex,lParamSort );
CString string2 = GetItemText( ( (tagSortItemlParam*)lParam2 )->nIndex,lParamSort );
COleDateTime date1,date2;
date1.ParseDateTime(string1);
date2.ParseDateTime(string2);
if(date1> date2)
return 1;
else if(date1 < date2)
return -1;
else if(date1 == date2)
return 0;
return 0;
}

void CNewListCtrl::ReSetItemData()
{
tagSortItemlParam* lParam;
for(int i = 0 ; i < GetItemCount() ; i ++)
{
lParam = (tagSortItemlParam*)GetItemData(i);
lParam->nIndex = i;
SetItemData( i,(LONG)lParam );
}
}

void CNewListCtrl::OnDeleteitem(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
// TODO: Add your control notification handler code here
tagSortItemlParam* lParam = (tagSortItemlParam*)GetItemData(pNMListView->iItem);
if(lParam != NULL)
delete lParam;
*pResult = 0;
}

[netmare]

响应LVN_COLUMNCLICK,在xxx::OnColumnclickXXX中调用CList::SortItems,SortItems的第一个参数是一个函数指针,指向你写的用来比较CList中各项大小的回调函数(称之为foo),第二个参数是一个指针,指向要传给foo的数据(即foo的第三个参数l3),foo有三个参数,l1,l2,l3,CList::SortItems每次取出表中的两个数据作为l1和l2调用foo,如果foo返回-1表示l1<l2,1表示l1>l2,0表示l1=l2,如此循环知道所有数据比完.

[yb]

在向ListCtrl添加数据项时，在初始化LVITEM时使
LVITEM.lParam = (LPARAM)&LVITEM;

在OnColumnclick的消息事件中调用SortItems,在第一个参数中指定Compare Callback Function，在第一个参数中指定排序方式。

在Compare Callback Function:
int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2,
LPARAM lParamSort);
其中lParam1,lParam2中分别为待比较的两个数据项的指针，
lParamSort为用户指定的排序方式。

Now,what is you want to do?There goes anything!

[yb]

更正：排序方式应在Compare Callback Function的第二个参数中指定。

[Atan]

我的ListCtrl是一个对话框中的控件.
.....
void CFilecontrol::OnColumnclickFileconlist(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
// TODO: Add your control notification handler code here
long item ;//保存用户单击的列号
item = pNMListView->iSubItem ;//得到行号
//根据不同的列选择不同的排序方法
m_fileconlist.SortItems(CompareFunc,item);
*pResult = 0;
}
int CALLBACK CompareFunc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
//在此得到的前两个参数总是0,为什么????????
int result = 0;
result = CFilecontrol::m_pFilecon->CompareStringlParam1,lParam2,lParamSort);
return result ;
}

int CFilecontrol::CompareString(LPARAM lParam1, LPARAM lParam2,LPARAM lParamSort)
{
CString string1 = m_fileconlist.GetItemText(lParam1,lParamSort );
CString string2 = m_fileconlist.GetItemText(lParam2,lParamSort );
int result = string1.Compare(string2);
return result;
}

[Atan]

我从CodeGuru站点找到了答案.自己改了改用上了.但还是感谢大家!