Thread: Need some help with TinyXML

Hello, I need some help figuring out how to read the next element on the list. I first need to get out of the <Account> loop though, but i tired using break, but it doesn't work.

I kept getting an error when my parser get to <VirtualUser>.

Currently my code looks like this:

Code:

#include <iostream>
#include <string>
#include "tinyxml.h"
using std::cout;
using std::string;
using namespace std;
int main() {
    string file = "test7.xml";
    TiXmlDocument doc(file.c_str());
    if (doc.LoadFile()) {
        TiXmlElement *root = doc.RootElement();//goes to completeAccount

                for(TiXmlElement* example2 = root->FirstChildElement(); example2;
                example2 = example2->NextSiblingElement()) {   //goes to account        
  TiXmlElement* level2  = example2->FirstChildElement();  //goes to the level where name is          
            cout << "\n Name: ";
            cout << example2->FirstChild("name")->FirstChild()->Value();//take child name and turn in to string so i can use cout on it
            cout << "\n type:";
            cout << example2->FirstChild("type")->FirstChild()->Value();
            cout << '\n';
            break;//I used break to get out of the look because when it tired to keep going to read virtualUser It gave me an error.

        }
        cout << "Break ";   
         for(TiXmlElement* example2 = root->FirstChildElement(); example2;
                example2 = example2->NextSiblingElement()) {
            cout << "\n Login Name: ";
            cout << example2->FirstChild("loginName")->FirstChild()->Value();
                }
    }
}

My xml looks like this:


Optional: My other question is for example I noticed i get an error if one of my account doesn't have "type" in it how would i get it to just put "null" instead of giving me an error?

NextSiblingElement() should do the trick.

It should be noted that using attributes in tinyxml xml is much simpler than using actual child elements.

Code:

<completeAccount>
   <accountEntry>
       <account name = "AAA" type = "admin"/>
       <virtualUser loginName = "BBB" password = "1"/>
   </accountEntry>
</completeAccount>

Code:

struct AccountEntry
{
   std::string accountName;
   std::string accountType;
   std::string loginName;
   std::string password;
};

typedef std::vector<AccountEntry> entries;
entries accountEntries;

std::ostringstream ostrm;
std::ifstream inFile("myxml.xml");
ostrm << inFile.rdbuf();

TiXmlDocument doc;
doc.Parse(ostrm.str().c_str());

inFile.close();

TiXmlElement *pRoot = doc.RootElement();
if (pRoot)
{
    AccountEntry entry;
    TiXmlElement *pChild = pRoot->FirstChildElement();

    while (pChild)
    {
        TiXmlElement *pChildNode = pChild->FirstChildElement();
         if (pChildNode)
         {
            entry.accountName = pChildNode->Attribute("name");
            entry.accountType = pChildNode->Attribute("type");
         }

         pChildNode = pChildNode->NextSiblingElement();
         if (pChildNode)
         {
            entry.loginName = pChildNode->Attribute("loginName");
            entry.password = pChildNode->Attribute("password");
         }

         accountEntries.push_back(entry);   
         pChild = pChild->NextSiblingElement();
    }
}

That change in the XML will allow you to read in the items in a while loop and it makes the XML simpler to read. This code is not all that safe from a tinyxml standpoint b/c it assumes it knows the layout of the xml file. There are other functions to use which require you to specify the name of the node you want and also provided error checking if that node does not exist. The methods I used will simply throw exceptions deep in xstring or assembly code and will not give you an indication of the problem.

This code was tested in MSVS 2005 and should work with the example XML.