VC读写XML文件，包括新建、插入、修改，读取、删除等操作

// XMLSettings.cpp : implementation file // #include "stdafx.h" #include "BM.h" #include "XMLFun.h" #include <algorithm> ///////////////////////////////////////////////////////////////////////////// // CXMLFun CXMLFun::CXMLFun() { XmlDocPtr = NULL; xml_file_name = "config.xml"; } CXMLFun::~CXMLFun() { if(XmlDocPtr!=NULL) XmlDocPtr.Detach(); } CXMLFun::CXMLFun(CONST CHAR* filename) { ::CoInitialize(NULL); if(XmlDocPtr!=NULL) XmlDocPtr.Detach(); XmlDocPtr = NULL; xml_file_name=filename; load(filename); } void CXMLFun::clear() { if(XmlDocPtr!=NULL) XmlDocPtr.Detach(); DeleteFile(xml_file_name.c_str()); load(xml_file_name.c_str()); } // get a LONG value LONG CXMLFun::GetLong(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, LONG lDefaultValue) { /* Since XML is text based and we have no schema, just convert to a string and call the GetString method. */ LONG lRetVal = lDefaultValue; CHAR chs[256]; sprintf(chs,"%d", lRetVal); lRetVal = atol(GetString(cstrBaseKeyName, cstrValueName, chs).c_str() ); return lRetVal; } std::string CXMLFun::GetAttribute(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrAttributeName, CONST CHAR* cstrDefaultAttributeValue) { std::string strAttributeValue; std::string strDummy; GetNodeValue(cstrBaseKeyName, cstrValueName, NULL, strDummy, cstrAttributeName, cstrDefaultAttributeValue, strAttributeValue); return strAttributeValue; } // get a string value std::string CXMLFun::GetString(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrDefaultValue) { std::string strValue; std::string strDummy; GetNodeValue(cstrBaseKeyName, cstrValueName, cstrDefaultValue, strValue, NULL, NULL, strDummy); return strValue; } // set a LONG value LONG CXMLFun::SetLong(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, LONG lValue) { LONG lRetVal = 0; CHAR chsVal[256]; sprintf(chsVal,"%d", lValue); lRetVal = SetString(cstrBaseKeyName, cstrValueName, chsVal); return lRetVal; } // set a string value LONG CXMLFun::SetString(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrValue) { return SetNodeValue(cstrBaseKeyName, cstrValueName,cstrValue); } // set a string Attribute LONG CXMLFun::SetAttribute(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrAttributeName, CONST CHAR* cstrAttributeValue) { return SetNodeValue(cstrBaseKeyName, cstrValueName, NULL, cstrAttributeName, cstrAttributeValue); } LONG CXMLFun::GetNodeValue(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrDefaultValue, std::string& strValue, CONST CHAR* cstrAttributeName, CONST CHAR* cstrDefaultAttributeValue,std::string& strAttributeValue) { INT iNumKeys = 0; std::string cstrValue = cstrDefaultValue; std::string* pCStrKeys = NULL; std::string strBaseKeyName("//"); strBaseKeyName +=cstrBaseKeyName; if( strBaseKeyName.at(strBaseKeyName.length() -1) !='/' ) strBaseKeyName += "/"; strBaseKeyName += cstrValueName; MSXML2::IXMLDOMElementPtr rootElem = NULL; MSXML2::IXMLDOMNodePtr foundNode = NULL; foundNode=XmlDocPtr->selectSingleNode( _com_util::ConvertStringToBSTR(strBaseKeyName.c_str()) ); if (foundNode) { // get the text of the node (will be the value we requested) BSTR bstr = NULL; HRESULT hr = foundNode->get_text(&bstr); strValue =_com_util::ConvertBSTRToString(bstr); if(cstrAttributeName!=NULL) { MSXML2::IXMLDOMElementPtr elptr=foundNode; strAttributeValue=_com_util::ConvertBSTRToString(_bstr_t( elptr->getAttribute(_bstr_t(cstrAttributeName)))); } if (bstr) { SysFreeString(bstr); bstr = NULL; } return 0; } else return -1; } LONG CXMLFun::SetNodeValue(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName, CONST CHAR* cstrValue, CONST CHAR* cstrAttributeName, CONST CHAR* cstrAttributeValue) { /* RETURN VALUES: 0 = SUCCESS -1 = LOAD FAILED -2 = NODE NOT FOUND -3 = PUT TEXT FAILED -4 = SAVE FAILED */ LONG lRetVal = 0; INT iNumKeys = 0; std::string* pCStrKeys = NULL; // Add the value to the base key separated by a '\' std::string strBaseKeyName(cstrBaseKeyName); if( strBaseKeyName.at(strBaseKeyName.length() -1) !='/' ) strBaseKeyName += "/"; strBaseKeyName += cstrValueName; // Parse all keys from the base key name (keys separated by a '\') pCStrKeys = ParseKeys(strBaseKeyName.c_str(), iNumKeys); // Traverse the xml using the keys parsed from the base key name to find the correct node if (pCStrKeys) { if (XmlDocPtr == NULL) return -2; MSXML2::IXMLDOMElementPtr rootElem = NULL; MSXML2::IXMLDOMNodePtr foundNode = NULL; XmlDocPtr->get_documentElement(&rootElem); // root node if (rootElem) { // returns the last node in the chain foundNode = FindNode(rootElem, pCStrKeys, iNumKeys, true); if (foundNode) { HRESULT hr=NULL; // set the text of the node (will be the value we sent) if(cstrValue!=NULL) hr = foundNode->put_text(_bstr_t(cstrValue)); if(cstrAttributeName!=NULL ) { MSXML2::IXMLDOMElementPtr elptr=foundNode; elptr->setAttribute(_bstr_t(cstrAttributeName), _bstr_t(cstrAttributeValue) ); } if (!SUCCEEDED(hr)) lRetVal = -3; foundNode = NULL; } else lRetVal = -2; rootElem = NULL; } delete [] pCStrKeys; } return lRetVal; } // XMLFun.DeleteSetting("Settings/who","");删除该键及其所有子键 // delete a key or chain of keys LONG CXMLFun::DeleteSetting(CONST CHAR* cstrBaseKeyName, CONST CHAR* cstrValueName) { LONG bRetVal = -1; INT iNumKeys = 0; std::string* pCStrKeys = NULL; std::string strBaseKeyName(cstrBaseKeyName); if ( strBaseKeyName!="" ) { if( strBaseKeyName.at(strBaseKeyName.length() -1) !='/' ) strBaseKeyName += "/"; strBaseKeyName += std::string(cstrValueName); } // Parse all keys from the base key name (keys separated by a '\') pCStrKeys = ParseKeys(strBaseKeyName.c_str(), iNumKeys); // Traverse the xml using the keys parsed from the base key name to find the correct node. if (pCStrKeys) { if (XmlDocPtr == NULL) return bRetVal; MSXML2::IXMLDOMElementPtr rootElem = NULL; MSXML2::IXMLDOMNodePtr foundNode = NULL; XmlDocPtr->get_documentElement(&rootElem); // root node if (rootElem) { // returns the last node in the chain foundNode = FindNode(rootElem, pCStrKeys, iNumKeys); if (foundNode) { // get the parent of the found node and use removeChild to delete the found node MSXML2::IXMLDOMNodePtr parentNode = NULL; foundNode->get_parentNode(&parentNode); if (parentNode) { HRESULT hr = parentNode->removeChild(foundNode); parentNode = NULL; } foundNode = NULL; } rootElem = NULL; } delete [] pCStrKeys; } return bRetVal; } // get a basekey's all children's value LONG CXMLFun::GetKeysValue(CONST CHAR* cstrBaseKeyName, std::map<std::string, std::string>& keys_val) { INT iNumKeys = 0; std::string* pCStrKeys = NULL; std::string strValue; pCStrKeys = ParseKeys(cstrBaseKeyName, iNumKeys); if (pCStrKeys) { if (XmlDocPtr == NULL) // load the xml document return -1; MSXML2::IXMLDOMElementPtr rootElem = NULL; MSXML2::IXMLDOMNodePtr foundNode = NULL; MSXML2::IXMLDOMNodeListPtr nodelst= NULL; MSXML2::IXMLDOMNodePtr pNode= NULL; XmlDocPtr->get_documentElement(&rootElem); // root node if (rootElem) { foundNode = FindNode(rootElem, pCStrKeys, iNumKeys); if (foundNode) nodelst=foundNode->GetchildNodes(); if(nodelst!=NULL) { for (INT i=0; i<nodelst->length; i++) { pNode = nodelst->item[i]; keys_val[(CONST CHAR*)(pNode->nodeName)]=pNode->text;//(CONST CHAR*)pNode->xml; } foundNode = NULL; } pNode=N