Using C + + to manipulate XML, mainly the use of internal loop methods

This paper mainly shares the use of the loop method, set the XML node properties, using 3 kinds of cyclic methods.

XML file:

<?xml version= ' 1.0 ' encoding= ' utf-8 '?>
<root>
<seqs>
<seq name= "A" license= "1" enable= "true"/>
<seq name= "B" license= "1" enable= "true"/>
</seqs>
</root>

The first method: the Vecseq size as a cyclic condition, the most convenient, because you can directly use the int i

#include <iostream>
#include "rapidxml/rapidxml.hpp"
#include "rapidxml/rapidxml_utils.hpp"
#include "rapidxml/rapidxml_print.hpp"
#include "boost/property_tree/xml_parser.hpp"

using namespace Rapidxml;

struct SEQSTRUCT
{
Std::string Seqname;
Std::string Seqlicense;
};

int main ()
{
Seqstruct Seqs;
std:: vector<seqstruct> vecseq;
Seqs.seqname = "Zhang";
Seqs.seqlicense = "true";
Vecseq.push_back (SEQS);
Seqs.seqname = "Liu";
Seqs.seqlicense = "true";
Vecseq.push_back (SEQS);

for (int i = 0; i < 2; i++)
{
Std::cout <<vecSeq[i].seqName;
Std::cout <<vecSeq[i].seqLicense;
Std::cout << Std::endl;
}

File<> Fdoc ("E:/uimris/branches/umr_main/main/features/win32test/xmlfile6.xml");
Std::cout << fdoc.data () << Std::endl;
Xml_document<> xmldoc;
Xmldoc.parse<0> (Fdoc.data ());

xml_node<>* RootNode = Xmldoc.first_node ();
xml_node<>* Seqsnode = Rootnode->first_node ();

xml_node<>* Seqnode = Seqsnode->first_node ();

for (int i = 0; i < vecseq.size (); ++i)
{
xml_attribute<>* attrseq = Seqnode->first_attribute ();
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqname.c_str ()));

Attrseq = Attrseq->next_attribute ();
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqlicense.c_str ()));

Seqnode = Seqnode->next_sibling ();
}
std::string text;
Rapidxml::p rint (Std::back_inserter (text), xmldoc, 0);
std::cout<<text<<std::endl;
Std::ofstream out ("E:/uimris/branches/umr_main/main/features/win32test/xmlfile7.xml");
if (!out.good ())
{
std::cout<< "Error";
}
Out << text;
Out.close ();

GetChar ();

return 0;
}

The second method is to point to the loop as a node, but need to redefine an int i

int i = 0;
for (xml_node<>* Seqnode = Seqsnode->first_node (); Seqnode! = NULL; seqnode = seqnode->next_sibling ())
{
xml_attribute<>* attrseq = Seqnode->first_attribute ();
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqname.c_str ()));

Attrseq = Attrseq->next_attribute ();
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqlicense.c_str ()));
i++;
}

The third method: the node attribute also acts as a loop, because there are 3 properties, only the first two properties, so you have to judge the condition

int i = 0;
for (xml_node<>* Seqnode = Seqsnode->first_node (); Seqnode! = NULL; seqnode = seqnode->next_sibling ())
{

for (xml_attribute<>* attrseq = Seqnode->first_attribute (); Attrseq->next_attribute () = NULL; AttrSeq = Attrseq->next_attribute ())//only Change 2 attribute
{
if (Bfirst)
{
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqname.c_str ()));
Bfirst = false;
}
Else
{
Attrseq->value (Xmldoc.allocate_string (Vecseq[i].seqlicense.c_str ()));
Bfirst = true;
}
}
i++;
}

Using C + + to manipulate XML, mainly the use of internal loop methods