Adding a Node to a XML file
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I'm having a problem adding a node to a XML file. I am able to open the file and read the elements but when i try to add a node is bombs. MSXML::IXMLDOMElement * node; node = document->createElement("Test"); document->appendChild(node); It doesn't like the append to child. What is the correct way to add a new node in a XML docuement? Thanks Scott
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I'm having a problem adding a node to a XML file. I am able to open the file and read the elements but when i try to add a node is bombs. MSXML::IXMLDOMElement * node; node = document->createElement("Test"); document->appendChild(node); It doesn't like the append to child. What is the correct way to add a new node in a XML docuement? Thanks Scott
try this instead:
MSXML::IXMLDOMElementPtr node; node = document->createElement("Test"); document->appendChild(node);This way you will use the smart pointer classes that make querying and managing interfaces a lot simpler. You will also need to use the #inport statement to load teh MSXML library and provide thses smart pointers for you.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
try this instead:
MSXML::IXMLDOMElementPtr node; node = document->createElement("Test"); document->appendChild(node);This way you will use the smart pointer classes that make querying and managing interfaces a lot simpler. You will also need to use the #inport statement to load teh MSXML library and provide thses smart pointers for you.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
That's what you need. Try the smart pointer implementation that I mentioned. If that does not work then make sure that you have a valid document created.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
That's what you need. Try the smart pointer implementation that I mentioned. If that does not work then make sure that you have a valid document created.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
Have you tried reading the error response codes to see why it bombs? It would also be useful to see the code that you are using starting with where your Document is created.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
Have you tried reading the error response codes to see why it bombs? It would also be useful to see the code that you are using starting with where your Document is created.
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!Heres the code String strPathName; strPathName = "C:\\My Documents\\C_Projects\\XML\\books.xml"; CString csString; HRESULT hr; hr = CoInitialize(NULL); if (FAILED(hr)) { return; } hr = CoCreateInstance(MSXML::CLSID_DOMDocument, NULL, CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER, MSXML::IID_IXMLDOMDocument, (LPVOID*)&document); if (!document) { return; } BSTR bstr = NULL; document->put_async(VARIANT_FALSE); bstr = strPathName.AllocSysString(); VARIANT_BOOL varOkay = document->load(bstr); SysFreeString(bstr); BSTR nodeName; if (varOkay) { hr = document->get_documentElement(&element); if (FAILED(hr) || element == NULL) { MessageBox(_T("Empty document!"), _T("Error Loading XML"), MB_ICONWARNING); return ; } element->get_nodeName(&nodeName); m_List.AddString(CString(nodeName)); if(element->hasChildNodes()) { MSXML::IXMLDOMNode* firstChild = NULL; HRESULT hr; hr = element->get_firstChild(&firstChild); if (SUCCEEDED(hr) && firstChild != NULL) { ((MSXML::IXMLDOMElement*)firstChild)->get_nodeName(&nodeName); m_List.AddString(CString(nodeName)); } } MSXML::IXMLDOMElementPtr node; node = document->createElement("Test"); document->appendChild(node); } else { long line, linePos; BSTR reason = NULL; document->get_parseError(&parseError); parseError->get_errorCode(&hr); parseError->get_line(&line); parseError->get_linepos(&linePos); parseError->get_reason(&reason); CString strMsg; strMsg.Format(_T("Error 0x%.8X on line %d, position %d\r\nReason: %s"), hr, line, linePos, CString(reason)); MessageBox(strMsg, _T("Error Loading XML"), MB_ICONWARNING); SysFreeString(reason); return; } on the line -- document->appendChild(node); is gives the error Unhandled exception in XML.exe(kernal32.dll); 0xEO6D7363; Microsoft C++ Exception Scott
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Heres the code String strPathName; strPathName = "C:\\My Documents\\C_Projects\\XML\\books.xml"; CString csString; HRESULT hr; hr = CoInitialize(NULL); if (FAILED(hr)) { return; } hr = CoCreateInstance(MSXML::CLSID_DOMDocument, NULL, CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER, MSXML::IID_IXMLDOMDocument, (LPVOID*)&document); if (!document) { return; } BSTR bstr = NULL; document->put_async(VARIANT_FALSE); bstr = strPathName.AllocSysString(); VARIANT_BOOL varOkay = document->load(bstr); SysFreeString(bstr); BSTR nodeName; if (varOkay) { hr = document->get_documentElement(&element); if (FAILED(hr) || element == NULL) { MessageBox(_T("Empty document!"), _T("Error Loading XML"), MB_ICONWARNING); return ; } element->get_nodeName(&nodeName); m_List.AddString(CString(nodeName)); if(element->hasChildNodes()) { MSXML::IXMLDOMNode* firstChild = NULL; HRESULT hr; hr = element->get_firstChild(&firstChild); if (SUCCEEDED(hr) && firstChild != NULL) { ((MSXML::IXMLDOMElement*)firstChild)->get_nodeName(&nodeName); m_List.AddString(CString(nodeName)); } } MSXML::IXMLDOMElementPtr node; node = document->createElement("Test"); document->appendChild(node); } else { long line, linePos; BSTR reason = NULL; document->get_parseError(&parseError); parseError->get_errorCode(&hr); parseError->get_line(&line); parseError->get_linepos(&linePos); parseError->get_reason(&reason); CString strMsg; strMsg.Format(_T("Error 0x%.8X on line %d, position %d\r\nReason: %s"), hr, line, linePos, CString(reason)); MessageBox(strMsg, _T("Error Loading XML"), MB_ICONWARNING); SysFreeString(reason); return; } on the line -- document->appendChild(node); is gives the error Unhandled exception in XML.exe(kernal32.dll); 0xEO6D7363; Microsoft C++ Exception Scott
Try appending your newly created node to the "element" or root nod eof your document rather than your document. I beleive your problem is that there is already a root element in the document and that is why there is a problem. However appending your new node ot the root element of the document seems to work fine. If you have any other questions feel free to ask. Good Luck
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life! -
I'm having a problem adding a node to a XML file. I am able to open the file and read the elements but when i try to add a node is bombs. MSXML::IXMLDOMElement * node; node = document->createElement("Test"); document->appendChild(node); It doesn't like the append to child. What is the correct way to add a new node in a XML docuement? Thanks Scott
Might not solve the issue, but the API says the child must be a
IXMLDOMNode*, not aIXMLDOMElement*.
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