getElementById() is a member of DOMDocument. If you're using a DOM parser
(such as DOMBuilder, as demonstrated in the DOMCount sample app), the parse
call will return a pointer to the DOMDocument. An excerpt from DOMCount.cpp
follows:
// Instantiate the DOM parser.
static const XMLCh gLS[] = { chLatin_L, chLatin_S, chNull };
DOMImplementation *impl =
DOMImplementationRegistry::getDOMImplementation(gLS);
DOMBuilder *parser =
((DOMImplementationLS*)impl)->createDOMBuilder(DOMImplementationLS::MODE_SYN
CHRONOUS, 0);
:
:
DOMDocument *doc = 0;
try
{
// reset document pool
parser->resetDocumentPool();
doc = parser->parseURI(xmlFile);
}
:
:
Once you've got the doc, you can look up the element and manipulate it.
Something like the following should work (I've cheated a bit on the string
constants in the interest of readability):
XMLCh * elementId = L"my_id";
DOMElement * element = doc->getElementById(elementId);
if (element)
{
XMLCh * attributeName = L"my_att_name";
XMLCh * attributeValue = element->getAttribute(attributeName);
}
If I understand the problem, you'll set elementId to something based on an
error number, and attributeName will be a constant of your choosing.
You may want to consider storing the error text in the element content
rather than an attribute. I think that's an aesthetic choice in this case.
It's somewhat easier to get attribute text, though.
-----Original Message-----
From: Leitner, Sarah M. [Contractor] [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, December 10, 2002 10:37 AM
To: '[EMAIL PROTECTED]'
Cc: '[EMAIL PROTECTED]'
Subject: question
On the response from Erik and subsequent emails, I was told to use the
GetElementByID() methodcall. I am having trouble figuring how to use this
call. What do I instantiate to get to it? Can someone give me some sample
code? How do I use GetAttribute (below)?
This was the problem (sorry, the original email is downloaded in my windows
partition): I need to assign a number or letter code to each error message
that can occur, then store the text of the messages in an XML doc. What is
the best way to do this? It was suggested to Parse the error description doc
with DOM and save the document for error lookups (I know how to parse, do I
have to do anything special to save it?). Then do a GetElementByID()
methodcall supplying the error number. Then I do a GetAttribute to get the
error message in english.
Thanks much for all of your help.
Sarah
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