Problem with TiXmlDocument

[sandeep]

hi all,
i am facing the problem while writing the code like this:           

  TiXmlNode* xnode;
  {
        TiXmlDocument xdoc("C:\\books.xml");
    xdoc.LoadFile();
    xnode = xdoc.FirstChild();
  }
  TiXmlNode* node1;
  node1 = xnode;

once the document object goes outof scope it is no longer valid, but there is situation in my code resembmling the above sitation and i want the document object in the scope as above, i cant declare it in the same scope as xnode.
is there any solution for the such case?

[Ellers]

You can use Clone() to make a copy of the node.
http://www.grinninglizard.com/tinyxmldocs/classTiXmlNode.html#a72

So something like:
TiXmlNode* xnode;
{
TiXmlDocument xdoc("C:\\books.xml");
xdoc.LoadFile();
xnode = xdoc.FirstChild().Clone();
}

My 2c worth though (said without knowing the larger design scheme of your application) is that it is better to act on the data while you have it, rather than copy stuff.

e.g. something like:

TiXmlNode* xnode;
TiXmlDocument xdoc("C:\\books.xml");
xdoc.LoadFile();
xnode = xdoc.FirstChild();
do_something_with_node(xnode);

or to process many nodes

TiXmlNode* xnode;
TiXmlDocument xdoc("C:\\books.xml");
xdoc.LoadFile();
xnode = xdoc.FirstChild();
while (xnode) { // or use a for loop
  do_something_with_node(xnode);
  xnode=xnode->NextSibling();
}

HTH
Ellers