CMFCListCtrl自动排序的实现

 　　由于工作中要用到CMFCListCtrl控件中的排序功能，但是MFC下的类CMFCListCtrl中只提供了虚函数CompareItems，因此这个函数在我们自己的代码中是要自己实现的。我想从CMFCListCtrl继承下来实现自己的CXSLMFCListCtrl。她的功能就有自动排序的，根据其ListCtrl控件上的内容来判断数据类型，然后再作排序的实现。优先排序顺序为整形、时间、IP、字符串。

 

　　以下是实现的类：

// XSLMFCListCtrl.cpp : implementation file//#include "stdafx.h"#include "XSLMFCListCtrl.h"// CXSLMFCListCtrlIMPLEMENT_DYNAMIC(CXSLMFCListCtrl, CMFCListCtrl)CXSLMFCListCtrl::CXSLMFCListCtrl(){m_bJugedType = FALSE;}CXSLMFCListCtrl::~CXSLMFCListCtrl(){}BOOL CXSLMFCListCtrl::CanStrToInt(CString strParam){try{CString szItemData = strParam;ENSURE(szItemData != "");for (int i = 0; i < strParam.GetLength(); i++){if (szItemData[i] < '0' || szItemData[i] > '9'){return FALSE;}}return TRUE;}catch (CException*){return FALSE;}}BOOL CXSLMFCListCtrl::CanStrToDateTime(CString strParam){try{COleVariant vtime(strParam);vtime.ChangeType(VT_DATE);return TRUE;}catch (CException*){return FALSE;}}BOOL CXSLMFCListCtrl::CanStrToIP(CString strIP){int nPos, nCount = 0;CString strRemain, strNum;while (strIP != "" && nCount < 4){strIP.Trim();if (nCount < 3){nPos = strIP.Find(_T('.'));if (-1 == nPos || 0 == nPos){return FALSE;}strNum = strIP.Mid(0, nPos);}if ((nCount < 3) && (atoi(strNum) < 0 || atoi(strNum) > 255)){return FALSE;}else if (atoi(strIP) < 0 || atoi(strIP) > 255){return FALSE;}strRemain = strIP.Mid(nPos+1, strIP.GetLength()-nPos-1);strIP = strRemain;nCount++;}return TRUE;}int CXSLMFCListCtrl::OnCompareItems(LPARAM lParam1, LPARAM lParam2, int iColumn){ENSURE(lParam1 != NULL);ENSURE(lParam2 != NULL);WsfItemData *pData1;pData1 = (WsfItemData*)lParam1;UINT nLineIndex1 = pData1->m_nLineIndex;WsfItemData *pData2;pData2 = (WsfItemData*)lParam2;UINT nLineIndex2 = pData2->m_nLineIndex;CString ItemData1 = GetItemText(nLineIndex1 < nLineIndex2 ? nLineIndex1 : nLineIndex2, iColumn);CString ItemData2 = GetItemText(nLineIndex1 < nLineIndex2 ? nLineIndex2 : nLineIndex1, iColumn);int nItem1, nItem2;COleVariant OleTime1(ItemData1);COleVariant OleTime2(ItemData2);if (!m_bJugedType){if (CanStrToInt(ItemData1) && CanStrToInt(ItemData2)){m_nColumnType = XSL_LIST_INT;}else if (CanStrToDateTime(ItemData1) && CanStrToDateTime(ItemData2)){m_nColumnType = XSL_LIST_DATETIME;}else if (CanStrToIP(ItemData1) && CanStrToIP(ItemData2)){m_nColumnType = XSL_LIST_IP;}else{m_nColumnType = XSL_LIST_STRING;}m_bJugedType = TRUE;}switch (m_nColumnType){case XSL_LIST_INT:nItem1 = _ttoi(ItemData1);nItem2 = _ttoi(ItemData2);if (nItem1 == nItem2){return 0;}else{return nItem1 < nItem2 ? -1 : 1;}break;case XSL_LIST_DATETIME:OleTime1.ChangeType(VT_DATE);OleTime2.ChangeType(VT_DATE);if (OleTime1 == OleTime2){return 0;}else{return OleTime1 < OleTime2 ? -1 :1;}break;case XSL_LIST_IP:if (inet_addr(ItemData1) == inet_addr(ItemData2)){return 0;}else{return inet_addr(ItemData1) > inet_addr(ItemData2) ? -1:1;}return 0;break;case XSL_LIST_STRING:return ItemData1.Compare(ItemData2);break;default:return 0;break;}}BEGIN_MESSAGE_MAP(CXSLMFCListCtrl, CMFCListCtrl)END_MESSAGE_MAP()// CXSLMFCListCtrl message handlers